基于地理国情数据的城市土地利用变化与地表降雨径流关联分析  

Correlation Analysis of Urban Land Use Change and Surface Rainfall Runoff Based on Geographical National Conditions Data

作　　者：张丽平 孙英君 赵培华 王琦 Zhang Liping;Sun Yingjun;Zhao Peihua;Wang Qi(Shandong Jianzhu University College of Surveying And Geo-Informatics,Jinan Shandong 250101;Jinan Real Estate Measuring Institute,Jinan Shandong 250001,China)

机构地区：[1]山东建筑大学测绘地理信息学院,山东济南250101 [2]济南市房产测绘研究院,山东济南250001

出　　处：《国土与自然资源研究》2024年第1期32-37,共6页Territory & Natural Resources Study

摘　　要：城市化进程推动了社会经济发展,同时引发了污染、内涝等城市问题。城市化最直观的表现形式之一是土地利用变化,其与城市地表降雨径流变化之间的关联是本文关注点。本文以济南市中心城区为研究对象,利用分辨率优于2.5 m的2015、2020年地理国情数据,分析其土地利用变化情况,选择SCS(Soil Conservation Service)模型模拟计算研究区地表降雨径流。在参阅大量文献基础上,本文提出实验区反映地表下垫面单元产流能力的核心参数CN值,与高分辨率地理国情数据建立直接映射,来计算雨量充沛的两个时间节点的地表降雨径流。最后,本文利用地理探测器分析土地利用类型对地表降雨径流系数变化的影响,得出不透水面、未利用地、林地、草地的相互转换是影响城市地表降雨径流的主要因素。The process of urbanization has promoted social and economic development,and at the same time has causedurban problems such as pollution and waterlogging.One of the most intuitive manifestations of urbanization is land use change,and the relationship between it and the change of urban surface rainfall and runoff is the focus of this paper.This paper takes the central urban area of Jinan as the research object,and uses the geographic and national conditions data of 2015 and 2020 with a resolution better than 2.5 m to analyze its land use change,the SCS(Soil Conservation Service) model is selected to simulate and calculate the surface rainfall runoff in the study area.On the basis of referring to a large number of literatures,this paper proposes the CN value of the core parameter reflecting the runoff capacity of the underlying surface unit in the experimental area,and establishes a direct mapping with high-resolution geographic national conditions data to calculate the surface rainfall and runoff at two time nodes with abundant rainfall.Finally,this paper analyzes the influence of land use type on the change of rainfall runoff coefficient by using geographic detectors,and concludes that the mutual conversion of impervious surface,unused land,forest land and grassland is the main factor affecting urban rainfall runoff.

关 键 词：地理国情数据 土地利用变化 城市 地表降雨径流 地理探测器 

分 类 号：F301.24[经济管理—产业经济] P344[天文地球—水文科学]