城市扩张下的北京平原区降雨入渗补给量变化  

Precipitation Infiltration Change in Beijing Plain in the Context of Urbanization

作　　者：朱琳[1,2,3] 刘畅[1,2,3] 李小娟[1,2,3] 郭高轩[4] 潘云[1,2,3] 

机构地区：[1]首都师范大学资源环境与旅游学院,北京100048 [2]北京市城市环境过程与数字模拟国家重点实验室培育基地,北京100048 [3]资源环境与地理信息系统北京市重点实验室,北京100048 [4]北京市水文地质工程地质大队,北京100195

出　　处：《地球科学（中国地质大学学报）》2013年第5期1065-1072,共8页Earth Science-Journal of China University of Geosciences

基　　金：国家自然科学基金(Nos.41201420;41130744;41101033);京市科技新星项目(No.Z111106054511097);等学校博士学科点专项科研基金(No.10221010091)

摘　　要：结合WetSpass模型与地理信息系统(geographic information system,GIS)、遥感(remote sense,RS)技术分析了城市扩张引起的土地利用类型变化对北京平原区降水入渗补给量的影响.在估算出1982年和2007年降水入渗补给量的基础上,将2007年土地利用类型还原成1982年的情景重新估算,利用转移矩阵分析两年土地利用类型的相互转化关系,同时,基于GIS空间数据统计功能,计算出不同土地利用类型下的地下水补给量.结果表明,1982年至2007年,研究区内水浇地减少874km2,其中517km2转变为城镇建设用地.相对于1982年,2007年城镇建设用地扩张了831km2,区内降水入渗补给量减少约3 000万m3.研究成果可以为北京平原区的地下水资源保护及土地资源配置提供较为科学的参考.The WetSpass model is used to analyze the impact of urbanization on precipitation infiltration recharge in Beijing Plain combined with the technology of GIS（geographic information system）and RS（remote sense）in this paper.Based on the simulated precipitation infiltration in 1982and 2007,the influence of land use changing on the precipitation infiltration is quantitatively analyzed by assuming the land-use type in 2007was the same as that in 1982,and re-running WetSpass model with other input data in 2007.The transfer matrix is used to analyze the mutual transformation relationship of land-use types in the above-mentioned two years,and the statistical function of GIS is used to calculate the groundwater recharge under different land-use types.Results show that the area of irrigable land decreased by 874km2 from 1982to 2007,among which 517km2 turned to the central urban land.The central urban area increased by about 831km2.The increasing urban area and the decreasing crop area eventually lead to the reduction of the average groundwater recharge.The groundwater recharge decreased by about 3×107 m3 in 2007compared with the value under the simulated condition.The precipitation infiltration changed obviously in the region around Chaoyang and Fengtai districts characterized by significant urban expansion.This study can be a scientific reference for the groundwater resources protection and city layout of Beijing Plain.

关 键 词：城市化 降雨入渗补给 WetSpass模型 土地利用 

分 类 号：P641.8[天文地球—地质矿产勘探]