The subbasin hydrologic behaviors have been altered by many natural and anthropologic factors such as climate change and land development activities. Model-based assessment can be used to simulate both natural hydrological processes, human-induced effects, and management strategies on water resources. For the Ketar subbasin, the WEAP (water evaluation and planning) hydrologic model was developed that aimed at (1) evaluating the application of the WEAP model in the Ketar subbasin, (2) evaluating the demonstration of the WEAP model using model efficiency evaluation criteria, and (3) simulating hydrological processes of the subbasin using the WEAP model. WEAP-based soil moisture method (rainfall-runoff) hydrology routine is comprised of a lumped, one-dimensional, two-layer soil water accounting that uses empirical functions to designate evapotranspiration, surface runoff, interflow, and deep percolation for a sub-unit at root zone. A catchment is considered as the smallest hydrologic response unit. The catchment’s surface hydrological balance is typically estimated by discretizing the catchment into multiple land uses for which water balance is estimated at root zone. The monthly measured and simulated streamflow statistics showed a positive strong relationship with R2 of 0.82, NSE of 0.80, and IA of 0.95; and with R2 of 0.91, NSE of 0.91, and IA of 0.98 for calibration and validation periods respectively. Similarly, the mean monthly measured and simulated streamflow showed an agreement with R2 of 0.99, NSE of 0.97, and IA of 0.99, and R2 of 0.94, NSE of 0.93, and IA of 0.93 for the periods of calibration and validation respectively. The model has demonstrated the capability to represent the hydrologic dynamics of the subbasin both at monthly and mean monthly periods. In general, the overall model performance evaluation statistics show a very good agreement between measured and simulated streamflow at the outlet of the subbasin.

中文翻译：

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WEAP 模型在模拟埃塞俄比亚中央裂谷盆地流域水文中的评价

气候变化和土地开发活动等许多自然和人类因素改变了子流域的水文行为。基于模型的评估可用于模拟自然水文过程、人为影响和水资源管理策略。对于 Ketar 子流域，开发了 WEAP（水评估和规划）水文模型，旨在 (1) 评估 WEAP 模型在 Ketar 子流域中的应用，(2) 使用模型效率评估标准评估 WEAP 模型的示范, (3) 使用 WEAP 模型模拟子流域的水文过程。基于 WEAP 的土壤水分方法（降雨-径流）水文例程由一个集总的、一维的、两层土壤水分核算，使用经验函数来指定根区亚单位的蒸发蒸腾、地表径流、互流和深层渗透。流域被认为是最小的水文响应单元。流域的地表水文平衡通常是通过将流域离散为多个土地用途来估计的，这些用途在根区估计水平衡。每月测量和模拟的流量统计显示与 R2 为 0.82、NSE 为 0.80 和 IA 为 0.95 的正相关关系；校准和验证期间的 R2 为 0.91，NSE 为 0.91，IA 为 0.98。类似地，月平均测量和模拟流量显示与 R2 为 0.99、NSE 为 0.97 和 IA 为 0.99，以及 R2 为 0.94、NSE 为 0.93 和 IA 为 0 的一致性。93 分别用于校准和验证期间。该模型已经证明了在月和月平均期间表示子流域的水文动态的能力。总体而言，模型整体性能评价统计表明，子流域出口处实测和模拟的水流具有很好的一致性。