Impact of rainfall and landuse pattern on water and sediment yield in Soan Basin
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This study was undertaken for spatial and temporal rainfall pattern along with landuse landcover classification and change detection of Soan basin Pothwar region, further the assessment of water and sediment yield and modelling the impact of landuse changes on sediment yield of Soan basin was done using semi-distributed basin scale SWAT model The temporal rainfall trend using Mann-Kendall and Sen’s Slope estimates test revealed the decreasing trend of average annual rainfall due to negative values of Q and Z – statistics. The average annual rainfall ranges 400mm – 1710 mm in Soan basin and temporal and spatial rainfall analysis 1991 to 2012 depicted that there is substantial year to year and season to season variability in rainfall pattern and rainfall pattern is generally erratic in nature. The seasonal patterns showed that 60 % to 70 % rainfall occurred in monsoon months (Jun-Sep). The mean monthly analysis indicated that intensity of rainfall gradually goes on increasing from May to August and decreases sharply by the month of October. August is the highest rainfall recording month in all the stations.