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Service Contract No 2007 / 147-446 Strategic ... - Swaziland

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Table 7:Capacity, use, types and characteristics of existing large reservoirs in <strong>Swaziland</strong>PropertiesCapacity(Mm 3 )NameSurface area at FSL(ha)Draws water fromLubovaneDam 9Van EckDamLavumisaDamLuphohloDamMaguga Dam Mnjoli Dam Mkinkomo Weir NyetaneDamSand RiverDamSivunga Dam Hawane Dam155 10.4 0.345 23.6 (GSC) 332 (GSC) 153 (GSC) 3.2 (original) 6 50 6.9 2.7520 (NSC) 302 (NSC) 131 (NSC) 2.0 (present) 441,390 124.00 27.22 120.00 1 042.00 1 500.00 590.00 110.00 70Usuthu River UsuthuRiverPongolapoortDamLusushwanaRiverKomati RiverBlack Mbuluzi Lusushwana (LittleRiverUsuthu) RiverNyetaneRiverKomatiRiverNyetane andUsuthu RiversHeight (m) 50 17.9 16.05 45 115 42 15 20 25 13.25 11.5DWL (m) 1200 580 450 870 1500 400 630 <strong>147</strong>8 1200FSL (m) 224.00 135.88 7.52 1015.8(masl)626 294.5 At contour297.485Mbuluzi River129.25 Level (contour)Max drawdown (m) 120 2 997 (masl) 526 260.5 6 m from spill crest 9.5 119.0 10TypeClaycore/Rock fillRock fill Earth Rock fill Earth/Rock fill1 367 (masl)Rock fill Rock fill Earth Earth Earth ConcreteDate established 2009 1969 1996 1984 2001 1980 1963 RaisedIrrigation Irrigation Irrigation PowerIrrigation/Domestic19921965 1972 1984Irrigation Power Generation Irrigation Irrigation Irrigation Water supply toUseGeneration /Power generationMbabane &NgwenyaLocation 26º 10’S 26º 45’S 27º 17’S 26º 22’S 26 o 06’S 26º 10’S 26 o 30’S 26º 00’S 26º 40’S 26 o 14’S31º 40’E 31º 55’E 31º 51’E 31º 05’E 31 o 14’E 31º 40’E 31º 18’E 31 o 42’E 32º 00’E 31 o 05’ESiphofaneni Ubombo Lavumisa Siphocosini NkomanziDvokolwako Matsapha Big Bend IYSIS Ubombo HawanePlaceSugar Border(Pigg’s Peak) (Manzana)Scheme Ranches (Big(Big Bend) (Golela)Bend)* GSC = gross storage capacity; masl = metres above sea level; NSC = net storage capacity; FSL = full supply level; DWL = dam wall lengthSource: MNRE, WRB (2006)9 Lubovane has three dam walls: (i) Mhlatuzane – roller-compacted concrete, 50m high max; (ii) Golome – clay core rock fill, 50m high max; (iii) South saddle – earth embankment, 8m highmax.RDMU (<strong>Strategic</strong> Environmental Assessment of the National Adaptation Strategy) - Page 39

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