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Extraction and re-implementation of SWATModel calculations under the MAELIA platform
in order to simulate the socio-environmental
impacts of norms.
Hong Y., Vavasseur M., Louail T., Balestrat M., Sanchez-Perez J.M.,
Sauvage S., Therond O.
2013 International SWAT Conference, Toulouse, France
Context and objectives of MAELIA platform
- Water scarcity and agriculture water-use management.
- Simulation of interactions between water resources,
agriculture management, economic effects and climate
changes in REAL-TIME.
- Assessing the environmental, economic and social impacts of
management strategies and policies.
- Multi-agent platform.
MAELIA Platform
Material
Resources
Cognitive
Resources
Actors
Modeling of hydrological processes in MAELIA
Land phase
Routing phase
Other water
managements
Hydrological processes in MAELIA
Hydrological
MAELIA
Cropland
+ Water Cycle + Water management
Water flow
French Land-use Identification
System (RPG) to represent the
agricultural plots.
Jeux d’O Model
(Nolot 2003, INRA)
Land Phase
Create a special type of
HRU named HRU-RPG
SWAT
Specific
Formalisms
Routing Phase (Muskingum)
Land Phase HRU
Integrated Land-phase
SAsubbasin =  SAHRU +  SAHRU-RPG
Water cycle of land phase in MAELIA and SWAT
Enter sub-basin loop
Enter sub-basin loop
Compute precipitations and temperatures for
elevation bands
Enter HRU loop
Compute water yield for HRU-RPG
Compute precipitations and
temperatures for elevation bands
Enter HRU loop
Compute snowfall and snowmelt
Compute snowfall and snowmelt
Compute surface runoff and infiltration
rainfall using SCS curve number method
Compute soil water and lateral flow
Sub-basin
iteration
HRU
iteration
Compute surface runoff and
infiltration
Compute soil water and lateral flow
Compute water uptake and actual ET
Compute water uptake and actual ET
Compute base flow
Compute base flow
Aggregate HRU water yields
Aggregate HRU-non-RPG water yields
End HRU loop
End sub-basin loop
End HRU loop
Aggregate all HRUs results to sub-basins
(b) Land phase of SWAT
Compute geo-localized ponds, wetlands and
water-use (In prospect)
End sub-basin loop
(a) Land phase of MAELIA
Case study: Upper part of Garonne watershed
(MAELIA Zone)
- Water scarcity in the
Adour-Garonne Basin
(AGB):
250 Million m3/year;
80% agriculture water-use.
- Firstly tested in MAELIA
Zone.
- Drainage area: 6000 km2;
Length: 140 km.
Input Data: DEM and Pre-defined subwatershed and river networks.
DEM 50m
a) DEM 50m, (IGN).
National Geographical
Institute of France.
Pre-defined
sub-watershed
b) Pre-defined sub-watershed.
Elementary management areas
called Hydrographic Zones (ZH),
National Water-management
Office of France (ONEMA).
Pre-defined
stream networks
c) Pre-defined stream
networks. (AEAG)
Water Agency of AGB,
then simplified.
Input Data: Soil, Landuse and Weather Station
Soil Types
a) Soil Types. (INRA)
National Institute of the
Agronomic Research;
Needed parameters were
estimated through observations.
Land-use
b) Land-use. (CLC)
Corine-Land-Cover of
France, then simplified.
Weather Stations
SAFRAN
c) Weather Stations.
Rainfall, Temperature and
PET by 8x8 km grid;
Climatic model SAFRAN
(Météo-France).
First results with SWAT-calibrated results
Conclusions and perspectives
- The formalisms and hydrological processes of SWAT are
stable for integrating in other platforms or models.
- Sensitivity analysis of MAELIA platform and calibration.
- Simulation of ponds according to their different
characteristics (e.g. connectivity with river network, position
in the watershed, volume etc.).
MAELIA Application
Thank You !

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