金华江流域土地利用变化对洪水特征的影响分析  

Effects of Land-use Change on Flood Characteristics in the Jinhua River Basin

作　　者：王浩 秦巍 刘福瑶 田玺泽 许波刘 WANG Hao;QIN Wei;LIU Fu-yao;TIAN Xi-ze;XUBo-liu(Zhejiang Province Hydrology Management Center,Hangzhou 310009,China)

机构地区：[1]浙江省水文管理中心,浙江杭州310009

出　　处：《水电能源科学》2022年第11期82-84,34,共4页Water Resources and Power

基　　金：浙江省水利厅重点科技项目(RB1502)。

摘　　要：金华江是钱塘江的重要支流,流域内经济发达,人口众多。近30年城市发展迅速,下垫面变化较大,对洪水运动规律影响较大。研究洪水运动规律,对进行精准洪水预报和支撑水旱灾害防御具有重要意义。对金华江流域1980~2015年下垫面土地利用类型进行归类分析,发现2000年为土地利用变化转折点。以2000年为分界点,分别建立新安江三水源模型,重演分界点前后若干场历史洪水。对比分析模型参数变化,发现金华江流域土地利用变化导致流域内不透水面积比例增加,洪水洪峰增大,汇流时间变短。Jinhua River is an important tributary of the Qiantang River with developed economy and large population in the basin. The rapid urban developments in the last 30 years and the large changes of the underlying surface have a great impact on the flood movement law. The study of flood movement law is significant for making accurate flood forecasting and supporting flood and drought disaster prevention. This paper categorized and analyzed the land use types of the underlying surface from 1980 to 2015 in the Jinhua River basin, and the results show that 2000 is the turning point of land use change. Therefore, taking 2000 as the demarcation point, the three-source XAJ model of the basin was established separately to repeat several historical floods before and after the demarcation point. The comparative analysis of model parameters shows that the land use changes in the Jinhua River basin led to an increase in the proportion of impermeable area in the basin, an increase in the peak of floodwater and a shorter concentration time.

关 键 词：土地利用变化 新安江三水源模型 洪水特征 金华江流域 

分 类 号：TV877[水利工程—水利水电工程]