A Study on the Applicability of a Swat Model in Predicting the Water Yield and Water Balance of the Upper Ouémé Catchment in the Republic of Benin

IF 0.6 Q4 ENGINEERING, CIVIL

Slovak Journal of Civil Engineering Pub Date : 2022-03-01 DOI:10.2478/sjce-2022-0007

Oluwatosin Olofintoye, Am Ayanshola, A. W. Salami, Akim Idrissiou, J. O. Iji, O. Adeleke

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引用次数: 3

Abstract

Abstract This study investigates the applicability of a Soil and Water Assessment Tool (SWAT) model in predictions of the water yields and water balance of the Upper Oueme catchment in the northern part of the Republic of Benin. Meteorological and hydrological data for a period of 20 years were collected from the Meteorological Agency of Benin and the National Directorate of Water respectively. Spatial data such as a Digital Elevation Model and land use and soil maps were also extracted from suitable databases. Geographic information system (GIS) software was applied in combination with SWAT to process the spatial data and simulate the streamflow record. A good correlation between the simulated and observed data during the calibration and validation was found, using statistical measures such as the Nash-Sutcliffe Efficiency (NSE>0.65%), the standard deviation ratio (RSR<0.6), percent bias (±10%≤PBIAS<±15%), and the coefficient of determination (R2=0.78). An estimated potential water yield of 18,671.61mm in the catchment over the period of the simulation suggests that subsistence agriculture is sustainable in the area. The model is suitable for estimating the water yield and water balance in the catchment.

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Swat模型在贝宁共和国上乌萨梅斯流域水量和水量平衡预测中的适用性研究

摘要本研究调查了土壤和水评估工具（SWAT）模型在预测贝宁共和国北部Upper Oueme流域的水量和水平衡方面的适用性。分别从贝宁气象局和国家水利局收集了20年的气象和水文数据。还从适当的数据库中提取了数字高程模型、土地利用和土壤图等空间数据。将地理信息系统（GIS）软件与SWAT相结合，对空间数据进行处理，并模拟径流记录。在校准和验证过程中，使用Nash-Sutcliffe效率（NSE>0.65%）、标准偏差比（RSR<0.6）、偏差百分比（±10%≤PBIAS<±15%）等统计指标，发现模拟数据和观测数据之间存在良好的相关性，和决定系数（R2=0.78）。在模拟期间，集水区的估计潜在水量为18671.61mm，这表明该地区的自给农业是可持续的。该模型适用于估算集水区的水量和水量平衡。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Slovak Journal of Civil Engineering ENGINEERING, CIVIL-

自引率

0.00%

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审稿时长

29 weeks