北京岩溶水系统降水入渗系数研究  

Researchon Infiltration Coefficient of Precipitation in Karst Area of Beijing

作　　者：纪轶群 王树芳[1] 韩征 黄昱琪 曹颖[3] 郭兆成[4] JI Yiqun;WANG Shufang;HAN Zheng;HUANG Yuqi;CAO Ying;GUO Zhaocheng(Hydrogeology and Engineering Geology Team of Beijing(Beijing Institute of Geological Environment Monitoring,Beijing 100195,China;Information Centre of Beijing Geology Prospecting&Developing Bureau,Beijing 100195,China;Beijing Institute of Geography,Beiijng 100120,China;China Aero Geophysical Survey and Remote Sensing Center for Land and Resources,Beijing 100083,China)

机构地区：[1]北京水文地质工程地质大队(北京市地质环境监测总站),北京100195 [2]北京市地质矿产开发局信息中心,北京100195 [3]北京市地质研究所,北京100120 [4]中国国土资源航空物探遥感中心,北京100083

出　　处：《人民黄河》2020年第2期38-41,47,共5页Yellow River

基　　金：国家地下水监测工程项目;北京市地勘局E地质应用系统建设项目(PXM2018_158206_000005_1);北京市科技计划项目(Z141100003614060)

摘　　要：大气降水入渗补给地下水是一个复杂的过程,以区域水量均衡法和遥感、地理信息技术为依据,论证降水入渗系数与下垫面因子之间的关系,从栅格尺度(30 m×30 m)建立基于专家经验知识和加权评价系统的模型和统计学关系,得出北京各岩溶水研究区降水入渗系数。研究结果表明:①研究区内岩性与构造因子是影响降水入渗补给条件的关键因素;研究区内的碳酸盐岩区最利于降水入渗补给。②利用2011年大气降水资料,分别使用本文提出的降水入渗系数方法和传统降水入渗系数计算方法相互验证,对2011年大气降水入渗量进行计算,表明建立统计回归模型能有效得出栅格尺度(30 m×30 m)上北京山区岩溶水系统降水入渗系数值。The groundwater recharge from atmospheric precipitation is a complex process, which is related to the fl unsaturated zone lithology, topography, vegetation, geological conditions, human activities and etc. The precise precipitation infiltration rate is the key to evaluate groundwater resources. This work included water balance method and spatial information technology(remote sensing and geographic information technology) to analyze the factors that influencing the precipitation infiltration rate;and utilized GIS technology to build weighted evaluation model(weighted averages method) on the grid scale in order to identify the spatial difference index of precipitation infiltration. This paper calculated typical infiltration factors based on spring area using water balance method, and established statistical relationship between precipitation infiltration rate and spatial difference index. Then these results were applied to a mountainous region of karst water system in Beijing,which was verified by obtained precipitation infiltration data in 2011. It demonstrates that the unsaturated zone lithology and structures are the key factors affecting recharge conditions of precipitation infiltration, and the karst region has the best conditions for precipitation infiltration. Verified by 2011 data, the statistical regression model is able to precisely calculate the precipitation infiltration rate of the karst water system in karst area of Beijing on the grid scale.

关 键 词：降水入渗系数 岩溶水系统 水均衡法 北京市 

分 类 号：TV213.4[水利工程—水文学及水资源]