In the past few decades, considerable efforts have been made to model rainfall‐runoff and to predict the hydrological impacts of various factors using computer technology. The Environmental Protection Agency Storm Water Management Model (SWMM) has been proved to be a powerful tool which simulates the flow of watersheds with different characteristics. The SWMM model is a dynamic rainfall‐runoff simulation model used for single event and/or continuous runoff simulation. It is widely used throughout the world for analysis, planning, and design related to storm water of drainage systems in urban areas, with many applications in nonurban areas as well. This study aimed to assess the performance of the SWMM model for flood simulation in the Shiraz Khoshk River originated from an arid zone watershed. The study area with a combination of natural and urban watersheds (900.3 km²) is located in South‐West of Iran in Fars Province. In this study, the model was calibrated using 12 flood events recorded at the Eghbal‐Abad gauge station. Then, for validation, 10 and 4 other hydrographs were simulated for the Nahre‐Azam and Chenarsukhte gauge stations, respectively. The calibration and validation results show a good agreement between the observed and simulated flows (R² = 0.96 for the calibration, 0.91 and 0.87 for validation). The model performance criteria were plausible (e.g., Nash‐Sutcliff coefficient = 0.91 for calibration; and 0.88 and 0.86 for validation). Therefore, the results indicate the high efficiency of the model to simulate the flow in this watershed, useful for predicting the impact of various management scenarios on flow characteristics.

中文翻译：

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使用SWMM模型的洪水水文模拟：伊朗设拉子霍斯赫河的半干旱区流域案例研究

在过去的几十年中，已经做出了巨大的努力来模拟降雨径流并使用计算机技术预测各种因素对水文的影响。事实证明，环境保护局的雨水管理模型（SWMM）是一种功能强大的工具，可以模拟具有不同特征的流域的流量。SWMM模型是用于单个事件和/或连续径流模拟的动态降雨径流模拟模型。它在全世界范围内广泛用于与城市排水系统的雨水相关的分析，规划和设计，在非城市地区也有许多应用。这项研究旨在评估源于干旱区流域的设拉子Khoshk河中洪水模拟的SWMM模型的性能。²）位于法尔斯省伊朗西南部。在这项研究中，该模型是使用在Eghbal-Abad测距站记录的12次洪水事件进行校准的。然后，为进行验证，分别对Nahre-Azam和Chenarsukhte规范站模拟了另外10张和4张水文图。校准和验证结果表明，观察到的流量和模拟流量之间具有良好的一致性（ 校准的R ² = 0.96，验证的R ² = 0.91和0.87）。模型性能标准是合理的（例如，用于校准的Nash-Sutcliff系数= 0.91；用于验证的0.88和0.86）。因此，结果表明，该模型在此流域中模拟水流的效率很高，可用于预测各种管理方案对水流特征的影响。