The Impact Of Land Use Change On Runoff And
Peak Flood Discharges For The Nyando River In
Lake Victoria Drainage Basin, Kenya
Author(s)
P. M. Kundu & L. O. Olang
Abstract
The effects of land use changes on the characteristics of floods in the Nyando
River basin were investigated. Historical changes in the state of land cover were
derived by processing multi-temporal Landsat images. The detected changes,
together with other spatial datasets were subsequently used to estimate the
physically based catchment and hydrologic model parameters for runoff
generation and transformation, and for channel flow routing. The results
obtained indicated that the basin experienced significant increases in peak
discharge values, especially in the upstream areas where higher rates of
deforestation were detected. Over the study period, the peak discharges increased
by 16% in all of the 14 sub-catchments in the basin. Simulated flood volumes in
the basin also increased by 10% over the same period. Based on the results
obtained, the study outlined the consequences of land use change for flood
events in the basin.
Keywords: land use change, peak floods, catchment, GIS, hydrological model.
Keywords
land use change, peak floods, catchment, GIS, hydrological model
Related Book
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