Sedimentation represents a serious threat to the dam and reduces its useable water storage and its life span. Due to erosion and sedimentation problems, a dam gradually loses its ability to store water for the purposes for which it was built. The Soil and Water Assessment Tool model (SWAT) was utilized to estimate the sediment yield in Wadi Al-Arab dam at the northern part of Jordan. In this research, two sediment transport relationships were developed: one for the sediment yield as a function of surface runoff and another for the sediment yield as a function of the slope, area of the watershed, and water discharge by using a statistical regression analysis on a set of hydraulic variables. The results showed that the reservoir storage is reduced with an annual rate of 0.093 MCM, and the accumulated sediment occupies 15% of the total storage capacity during a period of 32 years. The model also identified the location of high sediment yield within the study area, which is located at the western part of the watershed. The result of this study was compared with those of other investigators and with the actual sediment data. The difference in sediment yield between this study and actual sediment deposition was about 7%. Based on the results, it was found that SWAT model could be used to predict catchment soil erosion in watershed and sediment yield trapped behind similar dams.

中文翻译：

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利用水文评估工具模型估算沉积物产量：以约旦北部的瓦迪·阿拉伯水坝为例

沉积物对大坝构成了严重威胁，并减少了大坝的可用蓄水量和寿命。由于侵蚀和沉积问题，大坝逐渐失去了用于建造目的的蓄水能力。利用土壤和水评估工具模型（SWAT）估算约旦北部Wadi Al-Arab大坝的沉积物产量。在这项研究中，建立了两种沉积物输运关系：一种方法是通过对水质进行统计回归分析，将沉积物产量与地表径流量成函数关系，将其与坡度，流域面积和排水量成函数关系。一组液压变量。结果表明，水库储量以每年0.093 MCM的速度减少，在32年的时间里，累积的沉积物占总存储量的15％。该模型还确定了位于研究区（位于流域西部）内高沉积物产量的位置。这项研究的结果与其他研究人员的研究结果和实际泥沙数据进行了比较。该研究与实际沉积物沉积之间的沉积物产量差异约为7％。根据结果​​，发现SWAT模型可用于预测流域集水区的土壤侵蚀和类似大坝后面的沉积物产量。这项研究的结果与其他研究人员的研究结果和实际泥沙数据进行了比较。该研究与实际沉积物沉积之间的沉积物产量差异约为7％。根据结果​​，发现SWAT模型可用于预测流域集水区的土壤侵蚀和类似大坝后面的沉积物产量。这项研究的结果与其他研究人员的研究结果和实际泥沙数据进行了比较。该研究与实际沉积物沉积之间的沉积物产量差异约为7％。根据结果​​，发现SWAT模型可用于预测流域集水区的土壤侵蚀和类似大坝后面的沉积物产量。