Abstract: Flooding continues to be a common environmental hazard in both developed and developing countries. Crops, settlement and infrastructure are usually impaired wherever flooding occur. The severity of damage as a result of floods has been documented to have a relationship with the flood magnitude, flood frequency and settlement of population on flood prone areas. Whereas various intervention measures have been implemented, the problem still persists. This is partly due to lack of adequate information on the extent of Lower Nzoia River Basin Flood Flows.