陈融旭,韩冰,赵凌栋,张杨,曹永涛

• 1:黄河水利科学研究院
• 2:河南省黄河水生态环境工程技术研究中心
• 3:河南省黄河流域生态环境保护与修复重点实验室

摘要(Abstract)：

近年来，极端降雨事件频发，给城市健康发展带来阻碍，北方平原城市存在降雨量偏少、地势平坦、河流水动力不足等现象，在面对超标准暴雨事件时，存在较大风险。以北方平原城市濮阳市马颊河流域为研究对象，基于MIKE FLOOD平台构建一维河网-二维地表模型相耦合的大尺度洪涝数值模拟模型，利用实测水文数据，对模型关键参数进行本地化处理，对100 a一遇降雨及极端降雨条件下区域洪涝状况进行了研究。研究结果表明，当河流糙率取值0.031、居民用地糙率取值0.08、有植被覆盖的土地糙率取值0.025、空地糙率取值0.028时，模型模拟精度较高。两种暴雨条件下，清丰县城、濮阳市区、濮阳县城受灾情况较为严重。极端降雨条件下，受灾面积、淹没水深、淹没时长均明显增加，受灾规模呈显著扩大趋势，积水深度超过1 m区域面积最大可达315.5 km~2,是100 a一遇降雨的6倍。极端降雨条件下，高风险区域面积达100 a一遇降雨的6.26倍，灾害风险严重程度显著上升；遭遇极端降雨时，应提升应急反应速度，加强防御能力，多措并举保障人民生命财产安全。

关键词(KeyWords)： 极端降雨;水灾害风险;数值模拟;MIKE FLOOD耦合模型;应对措施;城市防洪;降水;洪涝淹没范围

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51979120);; 中央级公益性科研院所基本科研业务费专项(HKY-JBYW-2019-10,HKY-JBYW-2019-19,HKY-JBYW2021-05)

作者(Author): 陈融旭,韩冰,赵凌栋,张杨,曹永涛

DOI: 10.13928/j.cnki.wrahe.2022.06.003

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