摘要 : The present study aims to explore the spatial distribution and trends in rainfall, its seasonality and erosivity between 1971 and 2015 over the Suketi river catchment of lower Himachal Himalayas in India. Daily rainfall recorded a... 展开 The present study aims to explore the spatial distribution and trends in rainfall, its seasonality and erosivity between 1971 and 2015 over the Suketi river catchment of lower Himachal Himalayas in India. Daily rainfall recorded at three stations in the catchment have been used for the computation of rainfall seasonality and erosivity by employing non-parametric indices say seasonality index, precipitation concentration index and modified Fournier index. The distribution maps have been prepared by applying the kriging technique of geographic information system. The results have indicated remarkable spatial and temporal variability in rainfall as well as in its seasonality and erosivity. Largely, the pattern of rainfall has been found unimodal (single wet season) and more than 95% area of the catchment have witnessed a marked seasonality and prevalence of very severe rainfall erosivity. However, the long-term annual rainfall erosivity has revealed a statistically non-significant decreasing trend. The highest values of rainfall erosivity have been observed in the month of July followed by August, June and September with lower reaches being the most vulnerable one. We have witnessed an absolute relationship between annual rainfall and modified Fournier index (R-2 = 0 center dot 999;p < 0 center dot 001), indicating that the spatial distribution of annual rainfall erosivity is intensely controlled by annual rainfall depth. Finally, it is hoped that the results of this study will assist farmers, agronomists and policy makers in chalking out best management practices for reducing soil erosion vulnerability not only for the Suketi river catchment but also for other identical catchments of the lower Himachal Himalayas. 收起