Moneague Flooding (Jamaica)

Moneague Flooding
Hebert Thomas, Water Resources Authority, Jamaica
Content
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Description
History
Causes
Present status and projections
Recommendations
Summary
Water Resources Authority,
Reproduced with permission of
WRA and the UDS, UWI-Mona.
Location
Water Resources Authority,
Reproduced with permission of
WRA and the UDS, UWI-Mona.
History of Flooding
Year of Rise
Annual Rainfall
(mm)
Duration of lake
(years)
1804
1810
1863
1874
1886
1916
1933
1963
1970
1974
1988
2002
2004, 2005
Impact
3 sq. mi.
covered
3,205
3
3,582
>3
> 0.7 sq. miles, >
8 houses
covered. 2 lives
lost
I life lost
>3
3,398 for 2005
Still rising in
2006
Water Resources Authority,
Reproduced with permission of
WRA and the UDS, UWI-Mona.
.65 sq. miles, 12
houses covered
2 lives lost
19
71
1964
197
6
-
193
4
06
197
60
6-1
Water Resources Authority,
Reproduced with permission of
WRA and the UDS, UWI-Mona.
Water Resources Authority,
Reproduced with permission of
WRA and the UDS, UWI-Mona.
Flooding Factors
Geology
Topography
Rainfall
Antecedent conditions
Water Resources Authority,
Reproduced with permission of
WRA and the UDS, UWI-Mona.
Geology
Geologic Factors
•Volcanics – runoff from
whch is recharge to the
Limestone Formation
•Basin underlain by White
Limestone Formation
BH #9
BH #10
-Features; faults, fractures
and sinkholes
BH #8
BH #5
BH #6
LYDFORD PLANT #1
BH #7
BH #12
BH #4
BH #11
BH #3
BH #2
BH #1
Water Resources Authority,
Reproduced with permission of
WRA and the UDS, UWI-Mona.
X-sec BH 1,11,12, Lydford Plant
BH #1
BH #11
BH #12
Lydford P lant
Water Resources Authority,
Reproduced with permission of
WRA and the UDS, UWI-Mona.
X-Sex BH 2,4,8
BH #2
BH #4
BH –Bore Hole
Water Resources Authority,
Reproduced with permission of
WRA and the UDS, UWI-Mona.
BH #8
X Sec BH 1,4,5,10
BH #4
BH #1
BH #5
BH #10
Water Resources Authority,
Reproduced with permission of
WRA and the UDS, UWI-Mona.
Sinkhole map
Water Resources Authority,
Reproduced with permission of
WRA and the UDS, UWI-Mona.
Catchment Area
Water Resources Authority,
Reproduced with permission of
WRA and the UDS, UWI-Mona.
Rainfall
Water Resources Authority,
Reproduced with permission of
WRA and the UDS, UWI-Mona.
Antecedent effects
Water Resources Authority,
Reproduced with permission of
WRA and the UDS, UWI-Mona.
Present Flooding
Moneague Lake
•Area covered 1,680,859 sq. m
(415 acres)
•12 house inundated
•Max depth – 11 meters (36 ft)
•Riverhead road depth – 7 m
•Rate of rise .04 ft /day
Tadmore (Clapham) Lake
•Area covered 491468 sq. m
(121 acres)
•1 houses inundated
•Goshen road threatened
Water Resources Authority,
Reproduced with permission of
WRA and the UDS, UWI-Mona.
Recommendations
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Investigate the feasibility of dyking or raising the level of the threatened
Riverhead to Goshen Road and implement the appropriate action.
Regular monitoring of the water quality and dissemination information to the
community.
Assess the suitability of the lake for recreational enterprises and provide
support for safe implementation.
Demarcate based on 1933 flood levels, the zones for appropriate landuse.
(Restrict the flood zones to agriculture)
Relocate houses in the flood zones
Water Resources Authority,
Reproduced with permission of
WRA and the UDS, UWI-Mona.
End
Water Resources Authority,
Reproduced with permission of
WRA and the UDS, UWI-Mona.