HEC-RAS 2D modeling for flood inundation mapping: a case study of the Krishna River Basin

IF 1.6 Q3 WATER RESOURCES Water Practice and Technology Pub Date : 2023-04-06 DOI:10.2166/wpt.2023.048
Komal Vashist, K. K. Singh
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Abstract

Floods are catastrophic natural disasters that cause a substantial toll on human lives, infrastructure, and the economy. Structural and non-structural measures are developed for planning flood mitigation strategies. Flood inundation mapping is valuable information for decision-makers and authorities to develop flood mitigation strategies and resource allocation. This study uses the HEC-RAS 2D model for flood inundation mapping in the Krishna River Basin. Digital elevation models (DEMs) of 12.5 and 30 m resolutions were used to model the inundation map. The study also investigated the effect of change in upstream boundary data on the inundated area. The simulated results with 12.5 m resolution DEM are found in good agreement with the validation data and conform to the inundated areas with the available reports. This study proves the 2D capabilities of HEC-RAS and helps the experts with better management practices.
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用于洪水淹没制图的HEC-RAS 2D建模:以克里希纳河流域为例
洪水是灾难性的自然灾害,对人类生命、基础设施和经济造成重大损失。为规划防洪战略,制定了结构和非结构措施。洪水淹没图是决策者和当局制定洪水缓解战略和资源分配的宝贵信息。本研究使用HEC-RAS 2D模型对克里希纳河流域进行洪水淹没制图。采用12.5 m和30 m分辨率的数字高程模型(dem)模拟淹没图。研究了上游边界数据变化对淹没面积的影响。12.5 m分辨率DEM的模拟结果与验证数据吻合较好,与现有报告的淹没区域吻合较好。该研究证明了HEC-RAS的二维能力,并有助于专家更好地进行管理实践。
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来源期刊
CiteScore
2.30
自引率
6.20%
发文量
136
审稿时长
14 weeks
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