Watershed Characteristics and Hydrological Parameters vs. Sediment Yield—Northern Regions of Pakistan

by Muhammad Ashiq, (M.ASCE),

Abstract: In order to manage, restore, or effectively maintain a watershed it is necessary to know what is really going on inside that watershed, which includes the effects of watershed and hydrological parameters and their resultant effect on sediment yield. Investigation of these parameters is relatively easy in developed countries having sufficient data and related information. So far as developing countries are concerned, with the lack of geological, vegetative, climatic, and sediment yield data (due to insufficient fmancial resources) the watershed management and restoration are difficult, particularly for uphill areas. This study was an effort to investigate the effects of watershed and hydrological parameters on sediment yield. For this purpose twelve watersheds, altitudes varying from 600 to 3000 meters, were selected in the northern regions of Pakistan. The temporal effects of watershed and hydrological parameters on sediment yield have been analysed. Three individual models and a combined model were developed. The combined model may be used to compute sediment yield from a watershed, at reservoirs inlet or at sites where new reservoirs have to be constructed.

Subject Headings: Watersheds | Sediment | Hydrology | Parameters (statistics) | Developing countries | Resource management | Information management | Ecological restoration | Asia | Pakistan

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