河海大学学报（自然科学版）2025，Vol.53Issue(6)：33-40,8.DOI:10.3876/j.issn.1000-1980.2025.06.004
考虑地形地貌特征与土地利用变化的小流域设计洪水计算方法
A method for design flood calculation in small watershed considering geomorphological features and land use change
摘要
Abstract
Traditional reasoning formula methods and instantaneous unit hydrograph methods are difficult to reflect geomorphological features and land use changes in design flood calculation.To address this issue,a new design flood flow concentration calculation method,namely the runoff curve number(SCS)geomorphologic general unit hydrograph method,was proposed by considering the influence of geomorphological features and land use changes on the time of flow concentration.This method was coupled with the SCS model to establish a complete flow generation and concentration model,and the Shangbu River Watershed in Hangzhou City was taken as an example to verify the method.The verification results show that compared to traditional reasoning formula method and instantaneous unit hydrograph methods,the SCS geomorphologic general unit hydrograph method is more reasonable for calculating design floods in small watersheds within urbanized areas,as it better reflects the watershed's geomorphological features and adapts to land use changes.Scenario analysis further reveals that the changes in underlying surface conditions caused by urbanization will lead to an increase in design flood volume and flood peak.关键词
设计洪水/SCS产流模型/广义单位线法/城市化/土地利用变化/上埠河流域Key words
design flood/SCS flow generation model/general unit hydrograph method/urbanization/land use change/the Shangbu River Watershed分类
建筑与水利引用本文复制引用
李彬权,任泽凌,王国庆,刘加进,鲍振鑫,刘翠善,张磊磊..考虑地形地貌特征与土地利用变化的小流域设计洪水计算方法[J].河海大学学报（自然科学版）,2025,53(6):33-40,8.基金项目
国家自然科学基金面上项目(42471049) （42471049）
