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Effect of vegetation and engineering control structures on surface runoff and sediment yield at Fizagat, Swat

Effect of vegetation and engineering control structures on surface runoff and sediment yield at Fizagat, Swat

Syed Zainul Arifeen and Abdul Khaliq Chaudhry

ABSTRACT

This study was conducted to evaluate the effect of different soil conservation measures, both biological and engineering on surface runoff and sediment yield in five contiguous small catchments having almost similar slopes and soil characteristics. Different treatments namely; mix plantation with engineering techniques, mix plantation, pure chir pine plantation with engineering techniques and pure chir pine plantation with range land improvement practices were randomly applied to four sub-catchments, while the 5th one was kept untreated and open to grazing. Nine year's (1986-1995) average data showed that both the hydrologic response and sediment yield from the catchment treated with mix plantation and engineering technique was less than half as compared to other treatments. This response was much higher in the catchment untreated and kept open to grazing. The analysis of variance showed that hydrological response and sediment concentration was significant and non significant at 5% level, respectively.

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Pakistan Journal of Forestry

June

Vol. 74, Iss. 1

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