Assessment of optional sediment transport functions via the complex watershed simulation model SWAT

Haw Yen, Shenglan Lu, Qingyu Feng, Ruoyu Wang, Jungang Gao, Dawn Michelle Brady, Amirreza Sharifi, Jungkyu Ahn, Shien Tsung Chen, Jaehak Jeong, Michael James White, Jeffrey George Arnold

研究成果: Article同行評審

16 引文 斯高帕斯(Scopus)

摘要

The Soil and Water Assessment Tool 2012 (SWAT2012) offers four sediment routing methods as optional alternatives to the default simplified Bagnold method. Previous studies compared only one of these alternative sediment routing methods with the default method. The proposed study evaluated the impacts of all four alternative sediment transport methods on sediment predictions: the modified Bagnold equation, the Kodoatie equation, the Molinas and Wu equation, and the Yang equation. The Arroyo Colorado Watershed, Texas, USA, was first calibrated for daily flow. The sediment parameters were then calibrated to monthly sediment loads, using each of the four sediment routing equations. An automatic calibration tool-Integrated Parameter Estimation and Uncertainty Analysis Tool (IPEAT)-was used to fit model parameters. The four sediment routing equations yielded substantially different sediment sources and sinks. The Yang equation performed best, followed by Kodoatie, Bagnold, and Molinas and Wu equations, according to greater model goodness-of-fit (represented by higher Nash-Sutcliffe Efficiency coefficient and percent bias closer to 0) as well as lower model uncertainty (represented by inclusion of observed data within 95% confidence interval). Since the default method (Bagnold) does not guarantee the best results, modelers should carefully evaluate the selection of alternative methods before conducting relevant studies or engineering projects.

原文English
文章編號76
期刊Water (Switzerland)
9
發行號2
DOIs
出版狀態Published - 2017

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Geography, Planning and Development
  • Aquatic Science
  • Water Science and Technology

指紋 深入研究「Assessment of optional sediment transport functions via the complex watershed simulation model SWAT」主題。共同形成了獨特的指紋。

引用此