It is widely accepted that soil erosion has become a serious problem in recent decades for dams in general. In particular, the Dam of Beni Haroun (Algeria) is confronted with this problem. The present paper aims at investigating all the parameters likely to have an impact on this phenomenon. For this, the Soil and Water Assessment Tool model is applied for the purpose of estimating the solid inputs that would arrive at the dam, using two different scenarios in order to determine the most appropriate data that allows having the best representation of the watershed. The simulated results are compared with the ones obtained with the first scenario, for which R² is between 0.032 and 0.9 and the NSE (Nash-Sutcliffe efficiency coefficient) is in the interval 0.1–0.88, for the calibration period. However, the value of R² is found between 0.028 and 0.4 and the NSE in an interval of 0.27–0.88 for the validation period. In addition, R² is between 0.5 and 0.7, and the NSE ranges from 0.51 to 0.94 for the calibration period, in the second scenario; however, R² is in the interval from 0.27 to 0.52, and the NSE from 0.63 to 0.91 for the validation period. The total soil erosion rate of the watershed turns out to be equal to 3944.835 tons/km²/year.

中文翻译：

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利用SWAT模型在阿尔及利亚贝尼·哈伦大坝流域的两种情景下进行泥沙输运模型

人们普遍认为，近几十年来，水土流失已成为大坝的严重问题。特别是贝尼·哈伦（Beni Haroun）大坝（阿尔及利亚）面临着这个问题。本文旨在研究可能对这一现象产生影响的所有参数。为此，使用土壤和水评估工具模型，以使用两种不同的方案估算将要到达大坝的固体投入量，以便确定最合适的数据，从而最好地代表流域。将模拟结果与在第一种情况下获得的结果进行比较，其中R ²介于0.032和0.9之间，并且在校准期间NSE（纳什-苏特克利夫效率系数）在0.1–0.88之间。但是，在验证期内，R ²的值介于0.028和0.4之间，NSE介于0.27-0.88之间。另外，在第二种情况下，校准期间的R ²在0.5到0.7之间，NSE在0.51到0.94之间。但是，在验证期间，R ²在0.27到0.52之间，NSE在0.63到0.91之间。该流域的总土壤侵蚀率等于3944.835吨/ km ² /年。