崇阳溪流域洪水预报模型构建  

Construction of a flood forecasting model in Chongyang River

作　　者：金保明[1] 王晨瑜 韦裕韬 颜望栋 曾泓源 JIN Baoming;WANG Chenyu;WEI Yutao;YAN Wangdong;ZENG Hongyuan(College of Civil Engineering,Fuzhou University,Fuzhou,Fujian 350108,China;Water Resources and Hydropower Management Center of Lishui City,Lishui,Zhejiang 323000,China)

机构地区：[1]福州大学土木工程学院,福建福州350108 [2]丽水市农村水利水电管理中心,浙江丽水323000

出　　处：《福州大学学报(自然科学版)》2025年第2期226-233,共8页Journal of Fuzhou University(Natural Science Edition)

基　　金：福建省自然科学基金资助项目(2023J01405);福建省水利科技项目(MSK202408)。

摘　　要：针对山区流域洪水预报问题,以崇阳溪上游流域为研究对象,基于数字高程模型(DEM)对流域进行数字化处理并划分子流域,并采用SCS-CN法及SCS单位线法对子流域进行产汇流计算.各子流域出口处对应一段河道,依据运动波方程将所有河道衔接形成河网并进行河网汇流演算,从而得到整个流域出口断面处的流量,构成崇阳溪上游流域洪水预报模型.最后,采用6场典型洪水对模型进行模拟验证.结果表明:各场洪水洪峰流量、洪量相对误差均小于5%,峰现时间绝对误差小于60 min,洪水模拟误差满足规范要求;模型确定性系数大于0.96,模拟结果良好.该洪水预报模型可为山区流域防汛工作提供依据.With the problem of flood forecasting in mountain basin,the upper reaches of Chongyang River was taken as the research object,and the basin was digitized based on DEM and divided into sub-basins,the soil conservation service curve number(SCS-CN)method and SCS unit hydrograph method were used to calculate the runoff yield and confluence of sub-basins.Each sub-basin outlet corresponded to a section of river.According to the motion wave equation,all rivers were connected to form a river network and its confluence calculation was carried out,and flow hydrograph of the outlet section of the whole basin was obtained.Then the flood forecasting model of the upper reaches of Chongyang River was formed.Six typical floods were used for simulation and verification.The results showed that the relative error of peak discharge and flood volume of each flood was less than 5%,the absolute error of peak time was less than 60 minutes,and the simulation error met the specification requirements;and the certainty coefficient of the model was greater than 0.96,and the simulation result s were well.The flood forecasting model could provide basis for flood control work in mountainous basin.

关 键 词：流域数字化处理 产汇流计算 SCS-CN法 崇阳溪 

分 类 号：TV124[水利工程—水文学及水资源]