[1] Tech Univ Kenya, Dept Geosci & Environm, Nairobi, Kenya
[2] Tech Univ Kenya, Dept Civil Engn, Nairobi, Kenya
[3] Univ Nat Resources & Life Sci, Inst Hydrol & Water Management, Dept Water Atmosphere & Environm, Vienna, Austria
[4] Tech Univ Kenya, Fac Appl Sci & Technol, Ctr Integrated Water Resource Management, Nairobi, Kenya
[5] Tech Univ Kenya, Dept Geog & Spatial Sci, Nairobi, Kenya
[6] Tech Univ Kenya, Dept Biosyst & Environm Engn, Nairobi, Kenya