西非锡尔巴河流域降雨-径流关系的日常模拟:HEC-HMS 模型的启示

IF 3.1 Q2 WATER RESOURCES
Idi Souley Tangam, Roland Yonaba, Dial Niang, Mahaman Moustapha Adamou, Amadou Keïta, H. Karambiri
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引用次数: 0

摘要

本研究的重点是西尔巴河流域 (SRB),这是西非的一个跨界流域,面积为 38,950 平方公里,由布基纳法索和尼日尔共同拥有,造成了尼亚美(尼日尔)下游的洪水泛滥。该研究利用 HEC-HMS 水文模型探讨了 2006-2020 年间日降雨量与径流量之间的动态关系。利用流域内 13 个气象站的观测降雨量和加贝-库鲁水文站出口的观测排水量对模型进行了校核。比较了两种模拟类型:(i) 2006-2020 年期间的连续模拟 (CS) 和 (ii) 基于事件的模拟 (ES),分别使用 2010、2012、2013、2015 和 2020 年的选定主要洪水事件。结果表明,两种建模方案下的模型性能均令人满意(CS 的 R2 = 0.84-0.87 和 ES 的 R2 = 0.94-0.98),其中 ES 的性能优于 CS。此外,不透水百分比和洪波衰减因子的校准模型参数分布也存在明显差异。敏感性分析表明,曲线编号、初始取水量、滞后时间和路由时间等因素对模型输出结果有影响。因此,该研究强调了模型的稳健性,并为石羊河流域的防洪管理和基础设施规划提供了重要见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Daily Simulation of the Rainfall–Runoff Relationship in the Sirba River Basin in West Africa: Insights from the HEC-HMS Model
This study focuses on the Sirba River Basin (SRB), a transboundary West African catchment of 38,950 km2 shared by Burkina Faso and Niger, which contributes to flooding downstream in Niamey (Niger). The study uses the HEC-HMS hydrological model to explore the dynamics of the daily rainfall–runoff relationship over the period 2006–2020. The model is calibrated using observed rainfall at 13 meteorological stations within the river basin and observed discharges at the Garbey Kourou hydrometric station outlet. Two types of simulation are compared: (i) a continuous simulation (CS) over the period 2006–2020 and (ii) an event-based simulation (ES) using selected major flood events in 2010, 2012, 2013, 2015 and 2020. The results showed satisfactory model performance under both modeling schemes (R2 = 0.84–0.87 for CS and R2 = 0.94–0.98 for ES), with a superior performance of ES over CS. Also, significant differences in the distribution of calibrated model parameters for the percent impervious and the attenuation flood wave factor were observed. A sensitivity analysis revealed that the curve number, initial abstraction, lag time and routing time factors were influential on the model outputs. The study therefore underscores the model’s robustness and contributes crucial insights for flood control management and infrastructure planning in the SRB.
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来源期刊
Hydrology
Hydrology Earth and Planetary Sciences-Earth-Surface Processes
CiteScore
4.90
自引率
21.90%
发文量
192
审稿时长
6 weeks
期刊介绍: Journal of Hydrology publishes original research papers and comprehensive reviews in all the subfields of the hydrological sciences, including water based management and policy issues that impact on economics and society. These comprise, but are not limited to the physical, chemical, biogeochemical, stochastic and systems aspects of surface and groundwater hydrology, hydrometeorology, hydrogeology and hydrogeophysics. Relevant topics incorporating the insights and methodologies of disciplines such as climatology, water resource systems, ecohydrology, geomorphology, soil science, instrumentation and remote sensing, data and information sciences, civil and environmental engineering are within scope. Social science perspectives on hydrological problems such as resource and ecological economics, sociology, psychology and behavioural science, management and policy analysis are also invited. Multi-and interdisciplinary analyses of hydrological problems are within scope. The science published in the Journal of Hydrology is relevant to catchment scales rather than exclusively to a local scale or site. Studies focused on urban hydrological issues are included.
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