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Environmental Resources Research، جلد ۲، شماره ۲، صفحات ۱۳۴-۱۴۶
عنوان فارسی
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عنوان انگلیسی Investigation of efficiency of Rangeland Hydrology and Erosion Model (RHEM) in water erosion (Case Study: Sangane Watershed- Iran)
چکیده انگلیسی مقاله Computer simulation models are increasingly popular for predicting soil loss to quantify the processes of detachment, transport and deposition of eroded soils. To assess the effects of different management on soil erosion and select the best management practices using models (especially process-oriented models) and their validation a positive step is considered. In this research the Rangeland Hydrology and Erosion Model (RHEM) was evaluated by using soil erosion measuring plots and recorded observed rain in Sangane research station, Khorasan razavi province, Iran. The model was run and the predicted runoff and sediment yield values were compared with measured runoff and sediment yield values. Then sensitivity analysis and calibration were done on sensitive parameters and model was run with calibrated parameters. In the calibration period the, the model efficiency (ENS) values and the coefficient of determination (r2) were 0.92 and 0.95 for sediment, and 0.60 and 0.70 for runoff, respectively. In validation period, the (ENS) values and (r2) values in 99% Confidence level were 0.70 and 0.84 for sediment and 0.11 and 0.65 for runoff, respectively. Our research indicated that the results of model were acceptable in 99% confidence level for sediment and could be used with reasonable confidence for soil loss quantification in the Sangane watershed and the other rangeland watershed with similar condition.
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نویسندگان مقاله محسن فعله گری |
correspond

علی طالبی |
my master

محمد تقی دستورانی | mohammad taghi
my master

صالح رنگ آور |
my master

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