The Soil and Water Assessment Tool (SWAT) was used to simulate monthly runoff in the Yarmouk River Basin (YRB). The objectives were to assess the performance of this model in simulating the hydrological responses in arid watersheds then utilized to study the impact of YRB agricultural development project on transport of sediments in the YRB. Nine and three years of input data, namely from 2005 to 2013, were used to calibrate the model, whereas data from 2014 to 2015 were used for model validation. Time series plots as well as statistical measures, including the coefficient of determination ( R 2 ) and the Nash–Sutcliffe coefficient of efficiency (NSE) that range between 0 to 1 and −∞ to 1, respectively, between observed and simulated monthly runoff values were used to verify the SWAT simulation capability for the YRB. The SWAT model satisfactorily predicted mean monthly runoff values in the calibration and validation periods, as indicated by R 2 = 0.95 and NSE = 0.96 and R 2 = 0.91 and NSE = 0.63, respectively. The study confirmed the positive impact of soil conservation measures implemented in the YRB development project and confirmed that contouring can reduce soil loss from 15 to 44% during the study period. This study showed that the SWAT model was capable of simulating hydrologic components in the drylands of Jordan.

中文翻译：

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SWAT模型在干旱地区流域模拟中的评估：以Yarmouk流域（约旦）为例

土壤和水评估工具（SWAT）用于模拟Yarmouk流域（YRB）的每月径流。目的是评估该模型在模拟干旱流域的水文响应中的性能，然后用于研究黄河三角洲农业发展项目对黄河三角洲沉积物运输的影响。使用九年和三年的输入数据（即2005年至2013年）来校准模型，而使用2014年至2015年的数据来进行模型验证。时间序列图和统计量度，包括确定的系数（R 2）和纳什-萨特克利夫效率系数（NSE），分别介于观测的和模拟的每月径流量值之间，范围是0到1和-∞到1。被用来验证YRB的SWAT模拟能力。SWAT模型令人满意地预测了校准和验证期内的月平均径流量值，分别由R 2 = 0.95和NSE = 0.96和R 2 = 0.91和NSE = 0.63表示。该研究证实了在YRB开发项目中实施的土壤保持措施的积极影响，并证实了等高线可以在研究期间将土壤流失从15％减少到44％。这项研究表明，SWAT模型能够模拟约旦干旱地区的水文成分。该研究证实了在YRB开发项目中实施的土壤保持措施的积极影响，并证实了等高线可以在研究期间将土壤流失从15％减少到44％。这项研究表明，SWAT模型能够模拟约旦干旱地区的水文成分。该研究证实了在YRB开发项目中实施的土壤保持措施的积极影响，并证实了等高线可以在研究期间将土壤流失从15％减少到44％。这项研究表明，SWAT模型能够模拟约旦干旱地区的水文成分。