Surface Water Delineation Report - Environmental Protection of

Transcription

Delineation Report_Georgia_March 2013
”Environmental Protection of International River Basins”
Activity 2.2: Water body identification and typology
CHOROKHI-ADJARISTSKALI PILOT BASIN, GEORGIA
March 2013
Table of Contents
Introduction ...........................................................................................................................................2
1. Criteria and Procedure of Delineation of Surface Water Bodies……………………………………………… …….3
1.1 Summary of the methodology for identifying surface water bodies…………………………………….........3
1.2 Coding of the Water Bodies in the Chorokhi-Adjaristskali pilot basin………………………………......…....5
2. Identification and delineation of Surface Water Bodies ................................................................... 5
3. Summary of of Delineated Water BodiesTypology ............................................................................ 6
4. Summary of Identification of Heavily Modified and Artificial Water Bodies .................................... 7
5. Preliminary Identification of Surface Water Bodies “at risk” ............................................................. 9
6. Water Bodies within Protected Areas ................................................. Error! Bookmark not defined.
7. Mapping of Delineated Water Bodies ............................................................................................. .14
References ............................................................................................................................................ 14
Annex I. List of Delineated Surface Water Bodies in the Chorokhi-Adjaristskali pilot basin................ 15
Annex II Methodology for Identification, Delineation and Classification of Surface Water Bodies.....20
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Abbreviations and Acronyms
AWB
Artificial Water Body
CIS
Common Implementation Strategy
DTL
Deputy Team Leader
EPIRB Environmental Protection of International River Basins Project
EU
European Union
GIS
Geographic Information System
HMWB Heavily Modified Water Body
HPP
Hydro Power Plant
NEA
National Environmental Agency under the Ministry of Environmental Protection of Georgia
NGO
Nongovernment organisation
RBA
River Basin Analysis
RBMP River Basin Management Plan
ToR
Terms of Reference
WB
Water Body
WBR
Water body “at risk”
WFD
Water Framework Directive
Introduction
The present report is prepared by the Project Key Experts, Tatjana Kolcova and Michael Jackman with
the assistance of Zurab Jincharadze, DTL. The technical implementation was made by “Information
Engineering Centre” NGO (Georgi Mikeladze) under the contract for providing GIS services for Water
Body Identification and Typology and Preliminary Classification of water bodies in the ChorokhiAdjaristskali pilot basin of Georgia. The following local experts dealing with hydromorphological and
hydro-chemical monitoring have been assisting in collecting information: Marina Arabidze(NEA), Djemal
Dolidze (NEA), Irakli Kordzaia (NEA), and Levan Papachashvili (NEA).
The Chorokhi-Adjaristskali pilot basin covers the Georgian part of the trans-boundary Chorokhi River, its
basin and the small rivers flowing into the Black Sea.
Information on the Turkish part of Chorokhi River Basin is not available at this stage of the Project.
The Chorokhi-Adjaristskali pilot basin is located in Ajara Autonomous Republic, which is located in
South-Western part of the country on the Black Sea coast.
Identification, delineation, typology and preliminary classification of the water bodies in the ChorokhiAdjaristskali pilot basin have been implemented based on the River Basin Analysis, which is a first step of
the River Basin Management Plan (RBMP). To achieve the objectives, the following specific activities
were carried out:
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1. Identification of surface water bodies in the Chorokhi-Adjaristskali pilot basin based on the
results of anthropogenic pressure-impact analysis and hydromorphological assessment.
2. Determination of the typology of identified surface water bodies.
3. Delineation and mapping of surface water bodies, including water bodies at risk (WBR) and
heavily modified water bodies (HMWB).
4. Preliminary classification of the surface water bodies in the Chorokhi-Adjaristskali pilot basin.
The technical implementation of the above-described activities was based on the practical application of
elements of the WFD and CIS documents, particularly the CIS Guidance Document #2 “Identification of
Water Bodies” and CIS Guidance Document #4: "Identification and Designation of Heavily Modified and
Artificial Water Bodies".
The outcomes of this activity will serve as a foundation for the next steps of development of the River
Basin Management Plan for the Chorokhi-Adjaristskali pilot basin.
1. Criteria and Procedure of Delineation of Surface Water Bodies
Under the term surface waters we considered all inland water objects, including rivers, canals, lakes,
reservoirs and ponds.
For the purpose of assessing the ecological status of surface water and planning and implementing
program of measures, rivers and lakes have been divided into discrete volumes, or bodies of surface
water (WBs). According to the Water Framework Directive (WFD) the “water body” should be a
coherent sub-unit in the river basin to which the environmental objectives of the directive must apply.
1.1 Summary of the methodology for identifying surface waterbodies
Surface “water bodies“ are discrete sections or parts of water bodies, which differ from each other in
specific natural characteristics, the nature of the impact of human activity, or any other significant and
distinguishable parameters (Sall et al, 2012).
The process of delineation and identifying surface water bodies consisted of division of water bodies
into sections and parts according to agreed parameters and criteria.
Each surface water body is subject to regular assessment of status and measures for improving and
maintaining the status of water bodies.
The method used for the WBs delineation involves identification of the location and boundaries of
surface water bodies and initial characterisation in accordance with the methodology described below.

The surface WBs within the river basin /sub-basin were identified as falling within either one of
the following surface water categories —rivers, lakes, or as heavily modified surface water
bodies.
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



For each surface water category, the relevant surface WB within the river basin/sub-basin was
differentiated according to a type. These types are defined using the system A of the WFD in
accordance with the ToR of EPIRB Project (Tab. 1).
Each surface WB within the river basin/sub-basin should be differentiated by the relevant
ecoregions in accordance with the geographical areas. The pilot basin under this review belongs
to the 24-th ecoregion (the Caucasus).
Afterwards the WBs were differentiated by surface water body types according to the
descriptors set out in the table 1.
For heavily modified surface water bodies the differentiation was undertaken in accordance
with the descriptors for whichever of the surface water categories (rivers or lakes) most closely
resembles.
Table 1.System A: Rivers and Lakes
Fixed
typology
Ecoregion
Type
RIVERS
Descriptors
24 (Caucasus)
Altitude typology
 high: >800 m
 mid-altitude: 200 to 800 m
 lowland: <200 m
Size typology based on catchment area
 small: 10 to 100 km2
 medium: >100 to 1 000 km2
 large: >1 000 to 10 000 km2
 very large: >10 000 km2
Geology
 calcareous
 siliceous
 organic
LAKES
Descriptors
24 (Caucasus)
Altitude typology
 high: >800 m
 lowland: <200 m
Size typology based on surface area
 0.5 to 1 km2
 1 to 10 km2
 10 to 100 km2
 >100 km2
Depth typology based on mean depth
 <3 m
 3 to 15 m
 >15 m
Geology
 calcareous
 siliceous
 organic
All rivers with a river basin over 20 km2 were considered for the purpose of establishing and identifying
surface water bodies. Rivers with the catchment areas smaller than 20 km2 were categorized into
individual water bodies in respect to their significance. However, all small rivers are included into larger
drainage basins, which serve as the basis for the management of water bodies.
There is no any lake with an area over 0,5 km2 within the pilot basin territory.
Establishment of surface water bodies was based on types of water bodies in natural conditions. The
type of the water body in natural conditions was identified for each surface water body.
The other criteria included:
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-
Human influence on the physical status of water bodies (“at risk”);
Stricter protection requirements established for protected areas.
A methodological problem for water management regulation is the large number of identified river
bodies and the consequent large volume of work required for studies, monitoring and surveillance.
Aggregating and grouping river bodies, in particular, should be considered in the future to reduce
administrative burden.
The guidelines used for WB identification and delineation is mentioned in Annex II on the page 20.
1.2 Coding of the Water Bodies in the Chorokhi-Adjaristskali pilot basin
For the coding of the delineated water bodies the international hydrological coding system was used,
known as the Hack's main streams or Gravelius order (Zavoianu et al, 2009), ranks streams based on a
hierarchy of tributaries.
Each delineated water body in the Chorokhi-Adjaristskali pilot basin will obtain a unique identifier using
the following format:
XxxYZZ, where
Xxx is a first 3 letters of the river name;
Y is the order of the river:




0 – order of the main river is flowing to the sea,
1 – order of its tributary,
2 – order of tributary of the 1-st order river,
3 – order of tributary of the 2-nd order river);
ZZ is the consecutive number of water bodies on the river of given order.
For example: the identifier for the second water body on Akavreta River is Aka202.
2. Identification and delineation of Surface Water Bodies
Surface water bodies are classified into water bodies in natural conditions, heavily modified and artificial
water bodies. Determination of surface water bodies and heavily modified water bodies is based on
several guidelines and an agreed methodology, is described below.
97 surface water bodies have been identified on the rivers of the Chorokhi-Adjaristskali pilot basin. Five
water bodies have been identified as heavily modified surface water bodies. No one artificial water body
is located on the territory of the pilot basin.
Table 2. Number and total length of river water bodies of the Chorokhi-Adjaristskali pilot basin
Water bodies in natural
Artificial water bodies
Heavily modified water bodies
conditions
Number
Length, km
Number
Length, km
Number
Length, km
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92
611.1
-
-
5
15.2
On the pilot basin territory there are no lakes with the surface area larger than 0,5km2 to be identified
as a water body. The results of WBs delineation are provided in Table 2.
A list of all surface water bodies is provided in Annex I and they are shown on the map in Figure 1.
Figure 1. Surface water bodies in Chorokhi-Adjaristskali pilot basin
3.Summary of of Delineated Water Bodies Typology
The type of a water body depends on the set of natural properties of the water body or their parts.
Identification of the types of rivers is based mainly on geographical and morphological character.
On the basis of the ecoregion all rivers in the Chorokhi-Adjaristskali pilot basin belong to one single type,
meanwhile by the Altitude, Geology factors and the Catchment size rivers fall within 11 groups:
- Type I includes 3 water bodies with the organic formation and the small catchment area less than
100 km2on the altitude below 200 m;
- Type II includes 14 water bodies with the siliceous formation and the small catchment area less
than 100 km2on the altitude below 200 m;
- Type III includes 22 water bodies with the siliceous formation and the small catchment area less
than 100 km2on the altitude from 200 to 800 m;
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- Type IV includes 15 water bodies with the siliceous formation and the small catchment area less
than 100 km2on the altitude above 800 m;
- Type V includes 1 water body (Kintrishi River) with the organic formation and the medium
catchment area from 100 to 1000 km2on the altitude below 200 m;
- Type VI includes 8 water bodies with the siliceous formation and the medium catchment area from
100 to 1000 km2on the altitude below 200 m;
- Type VII includes 13 water bodies with the siliceous formation and the medium catchment area
from 100 to 1000 km2on the altitude from 200 to 800 m;
- Type VIII includes 4 water bodies with the siliceous formation and the medium catchment area
from 100 to 1000 km2on the altitude above 800 m;
- Type IX includes 7 water bodies with the siliceous formation and the large catchment area 1000 to
10 000 km2on the altitude below 200 m;
- Type X includes 3 water bodies with the siliceous formation and the large catchment area 1000 to
10 000 km2on the altitude 200 to 800 m;
- Type XI includes 7 (Chorokhi River) water bodies with the siliceous formation and the catchment
area larger 10 000 km2on the altitude below 200 m.
The WB types within the Chorokhi-Adjaristskali pilot basin and the corresponding characterizing factors
are provided in Tables 3 below.
Table 3. Typology of rivers in theChorokhi-Adjaristskali pilot basin
Descriptor
I
II
III
IV
V
Ecoregion
Catchmen
t size, km2
Type
VI
VII
VIII
IX
X
XI
24
small:10 to 100 km2
Geology
Organic
Altitude
<200
medium: >100 to 1 000 km
Siliceous
<200
200800
Organic
>800
<200
2
Siliceous
<200
200800
>800
large:
>1 000 to
10 000 km2
very
large:
>10 000
km2
Siliceous
Siliceous
<200
200800
<200
4. Summary of identification of heavily modified water bodies and artificial waterbodies
Heavily modified and artificial water bodies are sub-categories of surface water bodies. Initial
identification of HMWBs and AWBs was based on the existing and easily available information for water
bodies.
A water body can be designated as a heavily modified surface water body or artificial water body only if
it meets the following criteria:
1) Changes in the hydromorphological properties of the water body, which would be required to achieve
a good ecological status, would have a significant negative impact on:
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



the environment in general;
activities for which the water is abstracted, such as drinking water reserves, electricity
production or irrigation;
water regulation, protection against floods, or drainage;
other equally significant permanent human development activities.
2) Due to limited technical resources or excessive costs, the benefits resulting from the artificial or
modified nature of the water body would not be achievable through alternative methods, which would
be more favourable for the environment.
In accordance with the EU WFD the HMWB is designed as “a body of surface water which as a result of
physical alterations by human activity is substantially changed in character” (CIS, Guidance Document
#4).
At this stage of the project the HMWBs were preliminary designed. The HMWB designation process aims
at justifying the reason of why the pre-designated HMWB should be finally classified as HMWB and
therefore should have less stringent objectives in terms of ecological status improvements.
Figure 2. Heabily modified water bodies and water bodies „at risk“ in the Chorokhi-Adjaristskali pilot basin
The HMWB designation process consisted of the following steps:
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1. Pre-designation: identification of the location, size, etc. of the water body, description of the
hydromorphological changes and ecological alteration(s);
2. Characterisation of the user(s) benefiting from the changes (subject or users that would benefit from
the changes);
3. Identification of measures to restore good ecological status of the water body (hydromorphological
characteristics);
4. Description of the impacts of the measure(s) on the user(s) and on the wider environment;
5. Test: Are the impacts significant?
6. Identification of potential alternative means for the user to achieve the same function;
7. Test: Are these alternatives feasible technically, economically and environmentally?
Five water bodies have been identified as heavily modified surface water bodies in the ChorokhiAdjaristskali pilot basin (Fig. 2):

Only one water body of the Adjaristskali River, Adj111, with a length 3.9 km, was identified as
HMWB due to significant hydromorphological changes by HPP construction. The derivation type
Adjaristskali HPP (“Atshesi”) with 16.0MW installed capacity was put into operation in 1930s of
the last century. The HPP withdraws water amounting to 45 m3/sec from the intake facility
located on the Adjaristskali River. From the intake structure, water is delivered to two turbines
located in the power house, through a 3.9 m diameter tunnel.

Four other HMWBs are located in the Chorokhi River’s downstream: Cho004, Cho006, Cho007
and Cho008. For more than 10 km to the mouth Chorokhi River is channelled, and the banks of
the river are reinforced by concrete dams of 3-4 meters height. These permanent and significant
alterations of river morphology should lead the changes in the hydrological regime. However,
the detailed analysis is not possible owing to lack of data.
Following the initial establishment of heavily modified surface water bodies, the final establishment will
be conducted after analyzing the gaps in the monitoring data and Joint Field Surveys. The final
establishment will consist of verification of the validity of the criteria used to qualify a water body as a
heavily modified surface water body.
5. Preliminary Identification of Surface Water Bodies “at risk“
According to the EU WFD, the WB category “at risk” means a risk of not achieving the “good“
status of water by 2015 owing to significant influence of the human activities. This category is
the additional criteria for division of the WBs which differ from others owing to the nature of
the impact of human activity.
The analysis and evaluation were based on the experts’ opinion and historic data, which did not
allow for deeper analysis of hydrologic and socioeconomic developments taking place in the
pilot basin. However, the detailed analysis of water regime and the water quality for these river
reaches has not been done due to lack of data. For this reason, the delineation of water bodies
“at risk“ were only a preliminary assessments and should be verified during the JFS.
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The category of rivers, water bodies “at risk“ are those which are significantly affected by sand
and gravel extraction from river beds, and water quality problems caused by anthropogenic
pollution.
The risk from sand and gravel extraction from river beds is a very important factor in the river
basin making a significant environmental impact, as this activity is widespread on the river
banks of Adjra. Over-extraction of sand and gravel negatively affects aquatic and riparian
ecosystems, and also causes river bed degradation and unstable banks.
The risk factors which determine the assignment of river water bodies in the ChorokhiAdjaristskali pilot basin within the risk group are given in Table 4 below.
Table4. Water bodies at risk in the category of rivers in the Chorokhi-Adjaristskali pilot basin and risk
Factors (“1” indicates a risk)
River
Basin
HMWB
Chorokhi
Achkva
Kintrishi
Korolistskali
1
0
0
0
HPP
0
0
0
0
Risk factors
Water quality problems
Point
Sand/gravel
pollution
extraction
1
1
1
0
0
1
0
1
Number Length,
of WB
km
6
1
1
1
29,3
1,7
0,9
8,5
Water bodies at risk due to water quality problems include 9 water bodies (8% of 85 river WBs):

The Adjaristskali River reach from Khulo settlement to the confluence with Kedlebi River
(Adj103) has a significant impact of urban waste water discharge to the river.

The Adjaristskali River reach from Kveda Makhuntseti settlement to the confluence with
Dologani River (Adj113) has significant impact due to sand and gravel extraction from
river beds and can release many non -priority specific pollutants e.g. sodium,
magnesium, potassium, calcium, manganese, antimony, sulphate and chloride and can
also affect the clarity of the water producing high turbidity and Total Suspended Solids
(TSS).

The Adjaristskali River reach from Shuakhevi settlement to the confluence with the
Chvanis-Tskali River (Adj105) has a significant impact due to urban waste water
discharge to the river and the main physico-chemical indicators of such pollution
pressures are high nutrient load and disturbed oxygenation conditions e.g. Biochemical
Oxygen Demand & physical parameters such as Total Dissolved Solids (TDS). In addition,
sand and gravel extraction from river beds is carried out and can release many non priority specific pollutants e.g. sodium, magnesium, calcium, manganese, antimony,
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sulphate and chloride and can also affect the clarity of the water producing high
turbidity and TSS.

The Adjaristskali River reach from Keda settlement to the confluence with the
Kalaskurisi River (Adj109) has a significant impact due to urban waste water discharge to
the river. The main physico-chemical indicators of such pollution pressures are high
nutrient load and disturbed oxygenation conditions e.g. high Biochemical Oxygen
Demand & physical parameters such as Total Dissolved solids (TDS). In addition, sand
and gravel extraction from river beds is carried out, and can release many non -priority
specific pollutants e.g. sodium, magnesium, calcium, antimony, sulphate and chloride
and can also affect the clarity of the water producing high turbidity and TSS.

The Chorokhi River upstream and downstream the confluence with the Adjaristskali
River nearby the Acharistskali settlement (Cho002, Cho003) has significant pollution
pressure from the sand and gravel extraction from river beds. This can release many
non -priority specific pollutants e.g. sodium, magnesium, calcium, manganese,
antimony, sulphate and chloride and can also affect the clarity of the water producing
high turbidity and TSS.

The Korolostskali River downstream Ortabatumi settlement (Kor002) has significant
pollution pressure due to sand and gravel extraction from river beds. This can release
many non -priority specific pollutants e.g. sodium, magnesium, potassium, calcium,
manganese, antimony, sulphate and chloride and can also affect the clarity of the water
producing high turbidity and TSS.

The Kintrishi River downstream of confluence with the Kinkishi River (Kin005) nearby
Kobuleti has the morphological alterations of the channel and significant pressure due
to sand and gravel extraction from river beds. This can release many non -priority
specific pollutants e.g. sodium, magnesium, potassium, calcium, manganese, antimony,
sulphate and chloride and can also affect the clarity of the water producing high
turbidity and TSS.

The Achkva River mouth reach nearby Kobuleti (Ach002) has certain impact on quality of
the water resources. The main pollution pressures are: urban water discharge,
wastewaters of food industry and solid wastes the main physico-chemical indicators of
such pollution pressures are high nutrient load and disturbed oxygenation conditions
e.g. Biochemical Oxygen Demand & physical parameters such as Total Dissolved solids
(TDS).
This information is summarised in Table 5, which also includes the tentative values for the
parameters that could be the upper concentration limits of the individual parameters, when the
river is under normal flows, and excludes turbulent flood conditions. Unfortunately there is
insufficient data available to accurately define these values, so these values are a basic starting
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point for an iterative approach. When the joint field survey is completed more data should be
available to refine these results.
Table 5. Water bodies “at risk” in the Chorokhi-Adjaristskali pilot basin
Discharge
Area Point (P)
Pollutant
WB CODE
Description
Length
Km2 Diffuse
Pressures
(D)
Aja103
The Adjaristskali
River reach from
Khulo settlement to
the confluence with
the Kedlebi River
11.6
279
D&P
Aja105
The Adjaristskali
River reach from
Shuakhevi
settlement to the
confluence with the
Chvanis-Tskali River
The Adjaristskali
River reach from
Keda settlement to
the confluence with
the Kalaskurici River
5.4
882
D&P
4.4
1380
D&P
The Adjaristskali
River reach from
Khveda
Makhuntseti
settlement to the
confluence with the
Bartskhana River
The Chorokhi River
confluence with the
Adjaristskali River
nearby Acharistskali
settlement
6.6
1499
D
sand and gravel
extraction from
river beds.
2.9
20392
D
Sand and gravel
extraction from
river beds.
Na,(>300), Mg,(>100),K
Ca,(>100), Mn (>0.5),
Sb(>0.05) SO4 (>300), &Cl
(>300) TDS (>800), TSS,
(>30) Turbidity(>100)
The Chorokhi River
confluence with the
Adjaristskali River
nearby Acharistskali
4.7
21947
D
Sand and gravel
extraction from
river beds.
Na,(>300), Mg,(>100),K
Ca,(>100), Mn (>0.5),
Sb(>0.05) SO4 (>300), &Cl
(>300) TDS (>800), TSS,
Aja109
Aja113
Cho002
Cho003
Urban
Wastewater.
Food industry
waste water.
Pollutant Physico/ Chemical
Indicators
urban waste
water discharge
to the river, the
sand and gravel
extraction from
river beds.
Urban waste
water discharge
to the river and
the sand and
gravel
extraction from
river beds.
BOD,(>5) Total N,
NO3,(>2.5) PO4( >
0.1),Total P (>0.2),
Cl,(>300), NH4 (>0.4),
&TDS (>800)
Na,(>300), Mg,(>100),K
Ca,(>100), Mn (>0.5),
Sb(>0.05) SO4 (>300), &Cl
(>300) TDS (>800), TSS,
BOD,(>5) Total N,
NO3,(>2.5) PO4( >
0.1),Total P (>0.2),
Cl,(>300), NH4 (>0.4),
Na,(>300), Mg,(>100),K
Ca,(>100), Mn (>0.5),Sr,
Mo, Sb(>0.05) SO4
(>300), &Cl (>300) TDS
(>800), TSS, (>30)
Turbidity(>100)
Na,(>300), Mg,(>100),K
Ca,(>100), Mn (>0.5),
Sb(>0.05) SO4 (>300), &Cl
(>300) TDS (>800), TSS,
Page 12 of 36
Ach002
WB CODE
settlement
The Achkva River
mouth reach
nearby Kobuleti
Description
1.7
Length
38
Area
Km2
D
Discharge
Point (P)
Diffuse
(D)
Water
discharge,
wastewaters of
food industry
and solid
wastes
BOD,(>5) Total N,
NO3,(>2.5) PO4( >
0.1),Total P (>0.2),
Cl,(>300), NH4 (>0.4), TDS
(>800)
Pollutant
Pressures
Pollutant Physico/ Chemical
Indicators
Na,(>300), Mg,(>100),K
Ca,(>100), Mn (>0.5),
Sb(>0.05) SO4 (>300), &Cl
(>300) TDS (>800), TSS,
Na,(>300), Mg,(>100),K
Ca,(>100), Mn (>0.5),
Sb(>0.05) SO4 (>300), &Cl
(>300) TDS (>800), TSS,
Kor001
The Korolistkali
River downstream
Ortabatumi
settlement
8.5
9
D
the sand and
gravel
extraction from
river bedsand
Kin005
The Kintrihi River
downstream of
confluence with the
Kinkishi River
nearby Kobuletih
0.9
250.2
D
Sand and gravel
extraction from
river beds
6. Water bodies within Protected areas
The purpose of protecting various areas is to preserve and protect the environment in certain regions
from the negative impact of human activities to preserve the people’s immediate living environment
and a viable natural environment as a whole.
On the territory of the Chorokhi-Adjaristskali pilot basin the Mtirala National Park, the Kintrishi Reserve
and the Machakhela National Papk are located.
The Mtirala National Park is situated on Kobuleti-Chakvi hill at far western part of the Adjara-Imereti
Range of minor Caucasian mountains. The area has the highest level of humidity in Georgia. The national
park covers 16 000 ha, and features flora and fauna characteristic of the humid forests.
There are whole five water bodies (Cha001, Cha002, Cha003, Bez101, Mch101) in the Chakvistskali River
Basin, one water body (Kor001) in the Korolistskali River Basin and one water body (Bar201) in the
Adjaristskali River Basin within the protected area.
The Kintrishi Reserve is situated in Kobuleti district, upstream of the Kintrishi River, 450-2000 m above
the Sea Level , which was founded in 1959. Total area of the Reserve is 13,893 hectares, of which
12,817 ha is forests, 200 ha – meadows, and 966 ha – reservoirs. The Kintrishi Reserve includes two
water bodies (Kin001 and Kin002) in the Kintrishi River Basin.
The Machakhela National Papk was established in July 2012 in the Valley of the Machakhela River. The
National Park has been established for the purpose of preservation of unique biological species and
landscape diversity, long-term protection of the Colchis forest ecosystem, development of tourism and
recreational activities in the natural and safe environment. The new National Park is part of the West
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Minor Caucasus Corridor and covers about 9,000 ha. There are five WBs of the Machakhlistskali River
Basin (Mac102, Mac103, Mac16, Mac108 and Sku201) within the protected area.
7. Mapping of Delineated Water Bodies
Mapping of the delineated surface water bodies of the Chorokhi-Adjaristskali pilot basin has been
implemented according to the provisions and recommendations of EU WFD (CIS) Guidance Document
#9: “Implementing the Geographical Information Systems (GIS) of the Water Framework Directive”.
Maps have been prepared in original scale of 1:250 000 for A3 format. All GIS Layers have been
assembled into entire feature class and stored in the ESRI ArcGIS 10.1 personal geo-database, in
WGS_1984_UTM_Zone_38N coordinate system.
The following GIS vector and raster layers were used during the implementation of the activity:
 Boundary of Ajara AR
 Point and polygon layers with settlements in Ajara AR
 River network of Ajara AR
 Catchment areas of all river streams with more than 5km in length
 Protected areas
 Digital Elevation Model of Ajara AR
 Satellite images of Ajara AR
 Geologic data of Ajara AR
 Data of point sources of pollution
 Data of diffused sources of pollution
 Data of Water abstraction sites
 Data of morphologically changed river beds
The following GIS layers were generated as a result of activity:



Surface water bodies of the Chorokhi-Adjaristskali pilot basin
Heavily modified surface water bodies of the Chorokhi-Adjaristskali pilot basin
Water bodies “at risk”
Page 14 of 36
REFERENCES
Environmental and Hydrologic Overview of Chorokhi-Adjaristskali River Basin, EPIRB Project,
2012
EU Water Framework Directive (2000/60/EC) Common Implementation Strategy, Guidance Document
#2, " Identification of Water Bodies", European Communities, 2003
EU Water Framework Directive (2000/60/EC) Common Implementation Strategy, Guidance Document
#4, "Identification and Designation of Heavily Modifiedand Artificial Water Bodies",European
Communities, 2003
EU Water Framework Directive, (2000/60/EC), European Communities, 2000
Methodology for Identification, Delineation and Classification of Surface Water Bodies, MCA-Moldova
THVA Project - Irrigation Sector Reform Activity, 2012
Sall M., Peterson K.andKuldna P. The Role of River Basin Management Plans in addressing diffuse
pollution from agriculture to limit the eutrophication of the Baltic Sea. National Report of Estonia, Baltic
Compass project, SEI Tallinn,2012
Zavoianu I., Herisanu G. and Cruceru N. Classification and codification systems for stream networks and
drainage basins. Annals of DAAAM & Proceedings, Report, 4EUAU, 2009
Page 15 of 36
ANNEX I: LIST OF THE SURFACE WATER BODIES IN CHOROKHI-ADJARISTSKALI PILOT BASIN
DelName
DelCode
Criteria
Elevation, m
Geology
Length(km)
Area, km2
Type
Adjaristskali
Adj101
>800
Siliceous
20.8
111
8
Gordjomi
Naplatis-Tskali
Gor201
Nap301
>800
>800
Siliceous
Siliceous
11.4
11.9
38.1
53.7
4
4
Gordjomi
Gor202
200-800
Siliceous
2.6
97.1
3
Adjaristskali
Adj102
200-800
Siliceous
1.3
210
7
Diakonidze
Dia201
>800
Siliceous
8.9
33
4
Adjaristskali
Adj103
200-800
Siliceous
8.4
279
7
Kachakhis-Tskali
Kac401
>800
Siliceous
9.9
48.7
4
Shiganis-Tskali
Skhalta
Didi-Tskali
Shi302
Skh201
Did301
>800
>800
>800
Siliceous
Siliceous
Siliceous
4.8
2.7
10.4
37.2
95.2
33.6
4
4
4
Skhalta
Skh202
>800
Siliceous
7.7
159.1
8
Skhalta
Skh203
200-800
Siliceous
10.2
219.6
7
Adjaristskali
Adj104
200-800
Siliceous
9.2
538
7
Uiusu
Uiu301
>800
Siliceous
9.4
43.6
4
Chirukhis-Tskali
Chi201
>800
Siliceous
19.3
156.6
8
Modulis-Tskali
Mod301
>800
Siliceous
11.4
56.7
4
Chirukhis-Tskali
Chi202
200-800
Siliceous
9.0
253.4
7
Tbeti
Tbe301
>800
Siliceous
11.9
61.2
4
Tbeti
DelName
Tbe302
DelCode
200-800
Elevation, m
Siliceous
Geology
5.1
Length(km)
73.4
Area, km2
3
Type
200-800
Siliceous
1.6
327.9
7
Chirukhis-Tskali
Chi203
R
Criteria
Page 15 of 36
Adjaristskali
Adj105
Naghvarevis-Tskali
R
200-800
Siliceous
5.4
882
7
Nag301
>800
Siliceous
23.6
135.5
8
Vanis-Tskali
Van301
>800
Siliceous
10.2
28.3
4
Chvanis-Tskali
Chv201
200-800
Siliceous
5.1
188.6
7
Adjaristskali
Adj106
200-800
Siliceous
12.0
1144
10
Tsoniarisi-Tskali
Tso201
200-800
Siliceous
8.5
35.1
3
Adjaristskali
Adj107
200-800
Siliceous
4.0
1202
10
Zvare
Zva201
200-800
Siliceous
5.2
13.0
3
Adjaristskali
Adj108
200-800
Siliceous
5.6
1235
10
Akavreta
Aka201
>800
Siliceous
3.7
47.7
4
Lodnari
Lod301
>800
Siliceous
10.8
38.3
4
Akavreta
Aka202
200-800
Siliceous
9.4
131.8
7
Adjaristskali
Adj109
<200
Siliceous
4.2
1380
9
Kalaskurisi
Kal201
200-800
Siliceous
8.2
30.2
3
Adjaristskali
Adj110
<200
Siliceous
1.1
1411
9
Khokhnis-Tskali
Kho201
200-800
Siliceous
10.5
24.2
3
Adjaristskali
Adj111
<200
Siliceous
3.9
1443
9
Adjaristskali
Adj112
<200
Siliceous
2.3
1469
9
Adjaristskali
Adj113
R
<200
Siliceous
5.8
1490
9
Dologani
Dol201
PA
200-800
Siliceous
3.6
6.5
3
Dologani
Dol202
200-800
Siliceous
6.4
11.5
3
Adjaristskali
DelName
Adj114
DelCode
<200
Elevation, m
Siliceous
Geology
0.8
Length(km)
1491
Area, km2
9
Type
Bartskhana
Brt201
200-800
Siliceous
6.7
11.5
3
R
R
HMWB
Criteria
Page 16 of 36
Adjaristskali
Adj115
<200
Siliceous
6.2
1522
9
Chorokhi
Cho001
<200
Siliceous
8.4
20034
11
Machakhlis-tskali
Mac101
200-800
Siliceous
3.5
2.6
3
Machakhlis-tskali
Mac102
PA
200-800
Siliceous
1.8
264
7
Machakhlis-tskali
Mac103
PA
200-800
Siliceous
3.9
5.7
3
Machakhlis-tskali
Mac104
200-800
Siliceous
2.4
289
7
Machakhlis-tskali
Mac105
200-800
Siliceous
4.2
308
7
Skurdidi
Sku201
>800
Siliceous
4.6
15.5
4
Skurdidi
Sku202
200-800
Siliceous
5.6
29.0
3
Kedkedi
Mac106
200-800
Siliceous
5.2
10.2
3
Machakhlis-tskali
Mac107
<200
Siliceous
6.7
367
6
Machakhlis-tskali
Mac108
PA
<200
Siliceous
1.6
369
6
Chorokhi
Cho002
R
<200
Siliceous
2.9
20410
11
Chorokhi
Cho003
R
<200
Siliceous
3.1
21941
11
Dzhocho-Tskali
Dzh101
<200
Siliceous
6.8
22.4
2
Chorokhi
Cho004
<200
Siliceous
1.5
21968
11
Chorokhi
Cho005
<200
Siliceous
1.3
21970
2
Makho
Mak101
<200
Siliceous
3.5
13.4
2
Chorokhi
Cho006
<200
Siliceous
2.7
21986
11
Boloko
Bol101
200-800
Siliceous
5.2
17.3
3
Boloko
Bol102
<200
Siliceous
5.2
21.4
2
<200
Elevation, m
Siliceous
Geology
3.5
Length(km)
22009
Area, km2
11
Type
200-800
Siliceous
6.5
18.7
3
Chorokhi
DelName
Cho007
DelCode
Charnali
Chr101
PA
PA
HMWB
HMWB
HMWB
Criteria
Page 17 of 36
Charnali
Chr102
<200
Siliceous
7.7
28.7
2
Chorokhi
Cho008
<200
Siliceous
3.6
22065
11
Achkva
Ach001
<200
Siliceous
13.0
28.4
2
Achkva
Ach002
R
<200
Siliceous
5.6
37.1
2
Achkva
Ach003
R
<200
Organic
1.7
38.0
1
Bartskhana
Bar001
<200
Siliceous
10.1
27.7
2
Medzhinisi
Med001
<200
Siliceous
9.6
31.6
2
Korolis-Tskali
Kor002
R
<200
Siliceous
8.3
20.4
2
Korolis-Tskali
Kor001
PA
200-800
Siliceous
5.8
31.7
3
Dekhva
Dek001
200-800
Siliceous
4.8
20.8
3
Dekhva
Dek002
<200
Siliceous
10.7
42.6
2
Dekhva
Dek003
<200
Organic
0.9
43.3
1
Chakvis-Tskali
Cha001
PA
200-800
Siliceous
11.1
86.9
3
Chakvis-Tskali
Cha002
PA
<200
Siliceous
2.6
93.1
2
Bezonis-Tskali
Bez101
PA
200-800
Siliceous
7.3
14.2
3
Chakvis-Tskali
Cha003
PA
<200
Siliceous
2.8
116.1
6
Chakvis-Tskali
Cha004
<200
Siliceous
5.8
142.4
6
Monairis-Tskali
Cha005
200-800
Siliceous
2.8
5.1
3
Mechkhris-Tskali
Mch102
<200
Siliceous
6.6
21.2
2
Mechkhris-Tskali
Mch101
200-800
Siliceous
3.4
6.4
3
Chakvis-Tskali
Cha006
<200
Siliceous
2.8
173.2
6
Kintrishi
DelName
Kin001
DelCode
PA
Criteria
>800
Elevation, m
Siliceous
Geology
9.3
Length(km)
58.7
Area, km2
4
Type
Kintrishi
Kin002
PA
200-800
Siliceous
14.2
137.1
7
HMWB
PA
PA
Page 18 of 36
Kintrishi
Kin003
<200
Siliceous
11.9
188.1
6
Kintrishi
Kin004
<200
Siliceous
6.0
205.5
6
Kintrishi
Kin005
<200
Siliceous
5.9
211.8
6
Kinkisha
Kik101
200-800
Siliceous
7.0
24.6
3
Kinkisha
Kik102
<200
Siliceous
8.7
37.0
2
Kinkisha
Kik103
<200
Organic
1.2
37.2
1
Kintrishi
Kin006
<200
Organic
0.9
250.3
5
R
Page 19 of 36
ANNEX II: Methodology for Identification, Delineation and Classification
of Surface Water Bodies
February 2013
Table of contents
1. Introduction ...................................................................................................................................... 22
2. GIS....................... ............................................................................................................................. 22
3. Method for identification and delineation ....................................................................................... 22
4. Identification and delineation using system A ................................................................................ 24
4.1 The ecoregion boundary .............................................................................................................. 23
4.2 Designation of the surface water categories ............................................................................... 26
4.3 Apply the altitude typology ........................................................................................................... 29
4.4 Apply the geology typology ........................................................................................................... 29
4.5 Apply the depth typology (lakes, reservoirs, ponds) ..................................................................... 29
4.6 Apply the catchment/surface area criteria ................................................................................... 30
4.7 Other criteria for the water bodies delineation ............................................................................ 30
5. Classification ..................................................................................................................................... 33
5.1 Principles for classification ............................................................................................................. 33
6. Coding of surface water bodies ........................................................................................................ 34
Page 20 of 36
Definitions
Artificial waterbody - a body of surface water created by human activity;
Body of surface water - a discrete and significant element of surface water such as a lake, an reservoir, a
pond, a stream, river or canal or part of a stream, river or canal or transitional water;
Ecoregion – a recurring pattern of ecosystems associated with characteristic combinations of soil and
landform that characterise that region, within which there is spatial coincidence in
characteristics of geographical phenomena associated with differences in the quality, health,
and integrity of ecosystems;
Heavily modified water body - a body of surface water which as a result of physical alterations by human
activity is substantially changed in character;
Lake - a body of standing surface water that is not linked to an ocean;
Point source of pollution - a point source of pollution is a single identifiable source of air, water, thermal,
noise or light pollution;
Pond - an artificial body of surface water, created by damming in the water with the help of dykes or by
turning off the water flow, used for fish growing or irrigation etc, with a volume of water, at the
normal retention level, up to one million m3;
Reservoir- an artificial body of water, which constitutes a reserve of water, with possible use for
different purposes, with a volume of water, at the normal retention level, over one million m3;
River basin - the area of land from which all surface water run-off flows through a sequence of streams
and rivers and possibly lakes into the sea at a single river mouth, estuary or delta, delimited by
the water outline;
Sub-basin - an area of land within a river basin district from which all surface runoff flows through a
series of streams, rivers and lakes to a particular point in a water course within that river basin
district;
Surface water - all water standing and/or flowing on the surface of the land other than groundwater;
List of Abbreviations
AWB
EU
GIS
HMWB
IDC
RBDMP
artificial water body
European Union
geographic information system
heavily modified water body
identification, delineation and classification
River Basin District Management Plan
Page 21 of 36
Methodology for identification, delineation and classification of surface water bodies
1. Introduction
This part describes the methodology for identification, delineation and classification (IDC) of surface
water bodies. The document is based on the material on the Methodology of identification and
classification of water bodies, developed under the Project “Irrigation Sector Reform Activity”
«Methodology for Identification, Delineation and Classification of Surface Water Bodies», September
2012.
2. GIS
The methodology presumes theavailability of asupporting geographic
(GIS);development of such a GIS is not part of this methodology.
information system
3. Method for identification and delineation
The method is elaborated in accordance with the requirements specified in Annex II of the EU Water
Framework, based on the typology.
Identification and delineation with the typology-based approach implies that surface water bodies can
be classified in accordance with:


type-specific reference conditions;
type-specific criteria for physico-chemical, hydrobiological and hydromorphological
parameters, in order to assess the chemical and ecological status of surface water
bodies.
The surface water bodies within the river basin district/sub-basin shall be identified as falling within
either one of the following surface water categories —rivers, lakes, or transitional waters— or as
artificial surface water bodies or heavily modified surface water bodies.
For each surface water category, the relevant surface water bodies within the river basin district/subbasin shall be differentiated according to type. These types are those defined using either system A
(EPIRB) or system B. Application of system B involves similar steps as described for system A, but also
involves additional steps and iterations in the case of additional factors characterizing water bodies.
The criteria to be applied under the system-A typology for rivers and lakes are summarised in Table 1.
For artificial and heavily modified surface water bodies the differentiation shall be undertaken in
accordance with the descriptors for whichever of the surface water categories most closely resembles
the heavily modified or artificial water body concerned.
Page 22 of 36
Table 1 System A: Rivers and lakes
Fixed
RIVERS
typology
Descriptors
LAKES
Descriptors
Ecoregion
Ecoregions shown in Figure 11
Ecoregions shown in Figure 11
Type
Altitude typology
 high: >800 m
 lowland: <200 m
Size typology based on catchment area
Altitude typology
 high: >800 m
 lowland: <200 m
Size typology based on surface area

small: 10 to 100 km2

0.5 to 1 km2

medium: >100 to 1 000 km2

1 to 10 km2

large: >1 000 to 10 000 km2

10 to 100 km2

very large: >10 000 km2

>100 km2
Depth typology based on mean depth

<3 m

3 to 15 m

>15 m
Geology
Geology

calcareous

calcareous

siliceous

siliceous

organic

organic
Surface water, as defined and delineated in accordance with the method based on a typology will not
make much difference in river basin management planning without verification of type and criteria for
chemical and ecological status of surface water bodies. In addition (in this case), to assess the status
should be available compatible monitoring data.
4. Identification and delineation using system A
4.1 The ecoregion boundary
Moldova and Ukraine are situated inside two ecoregions, as shown in Figure 11:


16: Eastern plains
12: Pontic province
Page 23 of 36
Belarus is located within 16 ecoregion (Eastern plains), Caucasus countries – within 24 ecoregion
(Caucasus).
For inclusion in the GIS, the boundaries of the ecoregions are defined in the (ZIP compressed) shape file
(vector data, polygon):
wfd_shp_ecoregions.zip, which can be downloaded from
http://www.eea.europa.eu/data-and-maps/data/ecoregions-for-rivers-and-lakes.
Figure 1.Ecoregions for rivers and lakes
In case the ecoregion boundary crosses a water body, this leads to dividing it into two separate water
bodies, as illustrated in the next two figures.
Page 24 of 36
Water body 1 Water body 2
Water body 3
Water body 4
Water body 5
Figure 2. Water bodies without ecoregion
Water body 3
Water body 4
Water body 5
Water body 6
Ecoregion 12: Pontic province
`
Ecoregion 16: Eastern planes
Figure 3.Water bodies with ecoregion.
4.2 Designation of the surface water category
A surface water body can comprise only one (and thus cannot overlap with) one of the following surface
water categories:




river;
lake;
reservoir;
pond.
Page 25 of 36
Step 1: Define the boundaries of water bodies
Error! Reference source not found.4 shows an example of a lake that is situated inside the course of a
river, thus resulting in three separate water bodies. The same situation applies when a reservoir or pond
has been created inside the river’s course.
Figure 4. The boundaries to the categories of surface water create boundaries to water bodies
Following these principles, surface water bodies are designated in the sub-basins and along the main
streams, in accordance with the corresponding categories.
Lakes, ponds and reservoirs with a surface area less than 0.5 km2 (<0.5 km2) will not be identified as
separate surface water bodies, in order to avoid an endless subdivision of surface water bodies.
Nevertheless, they will have to be addressed by the corresponding RBMP.
Step 2: Physical characteristics that are important in the delineation of water bodies
The confluence of a tributary may lead to a sub-division into three water bodies as illustrated in Figure
55: the main stream upstream of the confluence point, the tributary itself, and the main stream after
the confluence of the tributary.
Page 26 of 36
Figure 5.Example of the sub-division of a river based on physical features – in this case a river confluence
In order to avoid an endless subdivision of surface water bodies, in sub-basins the confluence of a
tributary will only be used for distinguishing separate surface water bodies if the length of this tributary
is equal to or larger than 10 km (≥10 km). As a consequence, tributaries with a length less than 10 km
(<10 km) will not be identified as separate surface water bodies. Nevertheless, they will have to be
addressed by the corresponding RBMP.
In particular cases, the identification and delineation of surface water bodies along the main stream, the
confluence of a tributary will only be used for distinguishing separate surface water bodies if the length
of this tributary is equal to or larger than 100 km (≥100 km).
The lake can be divided into more than one water body, if part of it is different from the rest of the
physical characteristics of the lake (Fig. 6).
Page 27 of 36
Figure 6. Example of the sub-division of a lake based on the typology
Step 3. Identification of Heavily modified and artificial water bodies
In principle, the boundaries of heavily modified water bodies are primarily delineated by the extent of
changes to the hydromorphological characteristics that is a result from physical alterations by human
activity and prevent the achievement of good ecological status.
See Step 1 for an example with a lake in the middle of the river, leading to the three surface WBs, and
similarly, this applies to the ponds and reservoirs which are HMWB or AWB.
In the next example, part of the river has been straightened (thus being ‘heavily modified’), rendering
this stretch into a separate heavily modified water body.
Figure 7. The establishment of water body boundaries through the identification and subsequent designation of
heavily modified water bodies
Page 28 of 36
4.3 Apply the altitude typology
The altitude criteria are mentioned in Table 1.
The next two figures show how the altitude typology can result in different water bodies. The figures
represent a river running downhill, with two lakes (reservoirs) inside its course.
Figure 8.Water bodies before applying the altitude criterion (‘longitudinal view’)
Figure 1Water bodies after the applying altitude criterion (‘longitudinal view’)
4.4 Apply the geology typology
The geology criteria are mentioned in Table 1.
4.5 Apply the depth typology (lakes, reservoirs, ponds)
The depth criteria are mentioned in Table 1 and applied to natural lakes, as well as ponds and reservoirs.
Page 29 of 36
4.6 Apply the catchment/surface area criteria
The catchment and surface area criteria are mentioned in Table 1. The surface area criteria are applied
to natural lakes, as well as ponds and reservoirs.
4.7 Other criteria for the water bodies delineation
4.7.1 Pressures and status of water
The location of discharge of wastewater from a point source of pollution (such as a municipal
wastewater treatment plant, an enterprise or the outlet of untreated municipal sewage) forms a
boundary for further differentiation in surface water bodies. The section downstream of the wastewater
discharge will be distinguished as a separate water body, as illustrated in Error! Reference source not
found.10 and Figure 11.
Water body 3
Water body 4
Water body 5
Figure 10.Water bodies without a wastewater discharge
Page 30 of 36
Figure 11.Water bodies with a wastewater discharge
The major changes in the status of surface water should be used to delineate surface water body
boundaries. If there is no sufficient information to accurately define the status of
waters, the analysis on pressures and impacts should be used as a surrogate for status. As
understanding of status improves, the boundaries of water bodies can be adjusted.
Page 31 of 36
Figure 12: Identification of water bodies according to differences in status
Page 32 of 36
4.7.2 Protected areas
The boundaries of water bodies and protected areas will, in most cases, not coincide because both
geographical areas are being defined for different purposes on the basis of different criteria. In case a
water body would not fully be inside or outside a protected area, it may be considered to sub-divide the
water bodies into two parts so that the boundaries coincide.
4.7.3 Wetlands
In relation to wetlands, this means that those wetlands must be associated with a “water
body”, which are directly influencing the status of the related “water body”. The boundaries of such
wetlands must be identified in a pragmatic way in order to meet the requirement of a “discrete and
significant” element.
5. Classification
5.1 Principles for classification
The identified and delineated surface water bodies will be classified in accordance with the provisions of
the WFD CIS Guidelines No.13“Overall Approach to the Classification of Ecological Status and Ecological
Potential” using the data of the biological, physical, chemical and hydromorphological monitoring.
If no surface water quality monitoring data are available for the surface water body itself, the following
approaches could be considered.
a) In case the surface water body is situated between two monitoring sites, its classification might
be interpolated from the monitoring data for both sites, while applying expert judgements and
knowledge about the actual situation in the field. The latter includes for example the
presence/absence of wastewater discharges between the two monitoring locationsand/or other
factors affecting the surface water quality along this stretch.
b) In case no downstream monitoring site exists, its classification might be inferred from the data
of the nearest upstream monitoring site, while applying expert judgements and knowledge
about the actual situation in the field. The latter includes for example the presence/absence of
wastewater discharges, the inflow of tributaries inside this stretch, the distance between the
surface water body and the monitoring site, et cetera.
c) In case the surface water body cannot be reasonably linked to monitoring sites, it could be
classified:
a. Provisionally by inference from surface water bodies situated in other parts of the subbasin or other sub-basins with presumed comparable characteristics and overall
settings. This requires expert judgements and a clear description of the arguments used
for inference. Furthermore, it should be clearly indicated that it concerns a provisional
classification.
b. As “unknown”, implying that it cannot be addressed in the RBMP for example in terms
of plans of measures.
Page 33 of 36
The Guidelines distinguishes five classes. In order to show the results of classification of surface water
bodies in maps either when highlighting results in tables, the following colours will be used:
(Use) Class I
(Use) Class II
(Use) Class III
(Use) Class IV
(Use) Class V
unknown
blue
green
yellow
orange
red
no colour
6. Coding of surface water bodies
The system for coding the identified and delineated surface waters will have to be developed in
harmony with the structure and contents of the State Water Cadastre.
Examples of elements for coding identified and delineated surface water bodies are included in Table 2.
It should, however, be noticed that the choice for a coding system will partially also depend on the
selection of the method for identification and delineation of surface water bodies.
Table 2 Examples of elements for coding surface water bodies
Descriptor
COUNTRY
RIVER BASIN
Elements
 Georgia
 Chorokhi
 Adjaristskali
all defined sub-basins
Possible codes
 GE
 Cho
 Adj
 The first three letters of
the name of the subbasin
ECOREGION
 12 - Provincia pontică
 24 - Caucasus
 12
 24
CATEGORY
 river
 lake
 reservoir
 RIV
 LAK
 RES
SUB-BASIN
Remarks
IDC of water
bodies has to be
done separately
for the main
stream, so
additional codes
have to be
defined for these
rivers
The eco-region
will not be
determined
during STAGE-I,
but acts a
placeholder for
future
developments
placeholders for
future use of
‘artificial water
Page 34 of 36
ALTITUDE+GEOLOGY
SEQUENCE NUMBER
 pond
 HMWB
 AWB
 PON
 HMWB
 AWB
 lowland: <200 m
 mid-altitude: 200 to 800
m
 calcareous
 siliceous
 AG1: lowland + siliceous
 AG2: mid-altitude +
siliceous
 AG3: lowland +
calcareous
 AG4: mid-altitude +
calcareous
body’ and
‘heavily modified
water body’
should be
considered
for the time
being, only two
generic types of
geology are
relevant: siliceous
(dominating) and
calcareous at
some locations
Numbering
convention
should be
sufficiently
flexible to allow
for addition of
more surface
water bodies in
the future as well
as chances in the
definition of
existing water
bodies
Page 35 of 36

Surface Water Delineation Report - Environmental Protection of

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