Regional Office based in Kakamega
Lake Victoria North Catchment Area (LVNCA) extends in latitude from its southern border on the equator 00º 00’ to about 01º 15’ N and in longitude from 34º 00’ to 35º 30’ East. Total area of LVNCA is 18,374km2, corresponding to 3.2% of the country.
The major rivers in LVNCA are Nzoia, Yala, Malaba, Malakisi, and Sio rivers. The Nzoia River is the largest river with a drainage area of 12,853 km2, or 70% of LVNCA, and is followed by the Yala River with a drainage area of 3,259 km2. Both rivers flow into Lake Victoria. The Sio, Lwakhakha, Malakisi and Malaba rivers flow across the border to Uganda. The Sio River drains into Lake Victoria along the border with Uganda. Total drainage area of these four trans boundary rivers accounts for 2,301 km2, or 12.5% of LVNCA.
Water demand and water availability
Available Water Resources
The available water resources consisting of the surface water runoff and sustainable yield of groundwater were estimated in LVNCA for the years 2010 and 2030 as follows:
Annual Available Water Resources
|Year||Volume in MCM/year|
|Percentage of 2010 values||107%||93%||107%|
Source: NWMP, 2030
The sustainable yield of groundwater was derived as 10% of the groundwater recharge in the catchment area excluding river courses and riparian areas with a width of 1 km.
The annual water demands estimated for 2010 and 2030 are summarized below;
Water Demands by Subsector
Water Demands (MCM/year)
-Source: NWMP, 2030