Effect of Rainfall and Temperature Variability on Streamflow in Nzoia River Basin, Kenya

Nzoia River Basin is individual of the regions in Kenya namely highly vulnerable to trend change making its hydrological regimes very sensitive to rainfall and hotness variability. The aim concerning this study is to assess the effect of precipitation and temperature instability on streamflow using long-term practical data from nine of or in the atmosphere stations and two hydrological stations. Trends are indicators to climatic instability and have been analysed utilizing the parametric test of Linear regression and the non-parametric test of Mann–Kendall. Mann-Kendall mathematical test was used to identify statistically significant styles in streamflow, rainfall and hotness. Rainfall and temperature exhibit both growing and decreasing styles in the basin. Streamflow in Nzoia river domains upstream at Webuye (IDA02) and coming after at Rwambwa (IEFO1) has been slowly climbing. There is a positive equating between streamflow and rainfall signifying that streamflow changes in accordance with precipitation. On the other hand, streamflow is negatively had connection with temperature. This is understandable likely that rainfall is the ruling factor for runoff creation; and higher hotnesses are a second order effect usually leading to raised evaporation and happening. The results of this study will be useful to tactics makers in the growth of adaptation plans for effective water money management in the lagoon.

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