Performance evaluation of different estimation methods of suspended sediment load by sediment rating curve in Sefidrood watershed

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mohammadi sedighe; SALAJEGHE ALI; AHMADI HASAN; GHODOUSI JAMAL; KIANI RAD ALI

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Journal: Journal of Range and Watershed Managment Year:2018 | Volume:70 | Issue:4 Page(s): 977-990

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Title

Performance evaluation of different estimation methods of suspended sediment load by sediment rating curve in Sefidrood watershed

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Keywords

Sediment Rating CurveQ2

SefidroodQ1

model efficiencyQ1

logarithmic conversionQ1

correction factorQ1

Abstract

Suspended sediment load is the biggest non-point pollution source and a major factor of degradation of surface water quality. Because of hydraulic models of sediment transport can not predict the suspended sediment load, Sediment Rating Curves as usual hydrological methods are utilized spread for this goal. Cause of regression equations of rating curve have a lot of bias due to logarithmic convert, correction factors in optimization of Sediment Rating Curve were used for eliminating of logarithmic conversion effect and bias of extrapolation in 20 hydrometric stations in up streams and major rivers of Sefidrood watershed. Comparing of 9 rating curve methods as one-linear, one-linear with correction factors as CF1, CF2, FAO, two-linear, mean loads within discharge classes, mean loads within discharge classes with correction factors as CF1, CF2 and FAO was conducted by RMSE and NASH criteria. Results showed that mean loads within discharge classes, mean loads within discharge classes with CF1 and CF2 correction factors have the most fitting to Sefidrood watershed stations. Our findings illustrated that CF1 and CF2 correction factors in majority of stations have compensated underestimation of rating curves and increased efficiency of models. Power of equation between sediment load and area was more than of one. According to results 30 million ton suspended sediment load enter to reservior of Sefidrood dam annually.

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APA: Copy

mohammadi, sedighe, SALAJEGHE, ALI, AHMADI, HASAN, GHODOUSI, JAMAL, & KIANI RAD, ALI. (2018). Performance evaluation of different estimation methods of suspended sediment load by sediment rating curve in Sefidrood watershed. JOURNAL OF RANGE AND WATERSHED MANAGEMENT (IRANIAN JOURNAL OF NATURAL RESOURCES), 70(4 ), 977-990. SID. https://sid.ir/paper/162546/en

Vancouver: Copy

mohammadi sedighe, SALAJEGHE ALI, AHMADI HASAN, GHODOUSI JAMAL, KIANI RAD ALI. Performance evaluation of different estimation methods of suspended sediment load by sediment rating curve in Sefidrood watershed. JOURNAL OF RANGE AND WATERSHED MANAGEMENT (IRANIAN JOURNAL OF NATURAL RESOURCES)[Internet]. 2018;70(4 ):977-990. Available from: https://sid.ir/paper/162546/en

IEEE: Copy

sedighe mohammadi, ALI SALAJEGHE, HASAN AHMADI, JAMAL GHODOUSI, and ALI KIANI RAD, “Performance evaluation of different estimation methods of suspended sediment load by sediment rating curve in Sefidrood watershed,” JOURNAL OF RANGE AND WATERSHED MANAGEMENT (IRANIAN JOURNAL OF NATURAL RESOURCES), vol. 70, no. 4 , pp. 977–990, 2018, [Online]. Available: https://sid.ir/paper/162546/en

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