利用ArcGIS研究密怀顺回补区地下水位时空变化  

Spatio-temporal Variation of Groundwater Level in Miyun-Huairou-Shunyi Recharge Area Based on ArcGIS

作　　者：张雨航 史芫芫 何炜[1,2] 安同艳 孙长虹 范清[1,2] ZHANG Yu-hang;SHI Yuan-yuan;HE Wei;AN Tong-yan;SUN Chang-hong;FAN Qing(Beijing Academy of Environmental Protection Sciences,Beijing 100037,China;National Engineering Research Center for Urban Environmental Pollution Control,Beijing 100037,China)

机构地区：[1]北京市生态环境保护科学研究院,北京100037 [2]国家城市环境污染控制工程技术研究中心,北京100037

出　　处：《科学技术与工程》2024年第6期2607-2615,共9页Science Technology and Engineering

基　　金：国家重点研发计划(2016YFC0503601);水体污染控制与治理科技重大专项(2018ZX07109-004);密怀顺水源涵养区环境风险精细化研究项目(JZ2022-001)。

摘　　要：密怀顺地区是北京市重要的水源涵养区,直接影响着主城区的供水安全。2014年南水北调盈余水量通过潮白河河道回补地下水,地下水位持续抬升,地下水升幅带不断变厚,包气带厚度变薄。基于ArcGIS软件,通过对区域地下水位2014—2022年进行研究,结果表明:研究区地下水位持续快速升高,升幅为26.38 m,其中密云区升幅19.01 m,怀柔区升幅28.26 m,顺义区升幅31.67 m;地下水位低升幅带面积为144.47 km^(2),占研究区面积的29.67%,地下水位中升幅带面积约为128.85 km^(2),占研究区面积的26.47%,地下水位高升幅带面积约为213.52 km^(2),占研究区面积的43.86%;研究区包气带厚度由43.07 m减小至16.69 m,减少了26.38 m,其中密云区由43.42 m减小至24.41 m,减少了19.01 m,怀柔区由39.38 m减小至11.13 m,减少了28.26 m,顺义区由45.83 m减小至14.11 m,减少了31.72 m。结果基本反映了该地区地下水时空变化特征,分区结果可进一步支撑地下水管理、地下水政策制定及地下水型水源地的精细化管理。Miyun-Huairou-Shunyi recharge area is an important water conservation area in Beijing,which directly affects the safety of water supply in the main urban area.In 2014,the surplus water from the South-to-North Water Diversion project was used to recharge groundwater through the Chaobai River channel.As a result,the groundwater level continued to rise,and the groundwater rise zone became thicker,while the thickness of the vadose zone became thinner.Based on ArcGIS software,regional groundwater level was studied from 2014 to 2022,and the results show as follows.The groundwater level in the study area continues to rise rapidly,with an increase of 26.38 m,including 19.01 m in Miyun District,28.26 m in Huairou District and 31.67 m in Shunyi District.The low-rise zone of groundwater level covers 144.47 km^(2),accounting for 29.67%of the study area.The mid-rise zone of groundwater level covers about 128.85 km^(2) accounting for 26.47%of the study area;the high-rise zone of groundwater level covers about 213.52 km^(2),accounting for 43.86%of the study area.The thickness of the vadose zone in the study area decreased by 26.38 meters from 43.07 meters to 16.69 meters.The thickness of the vadose zone in Miyun area decreased by 19.01 m from 43.42 m to 24.41 m,and the thickness of the vadose zone in Huairou area decreased by 28.26 m from 39.38 m to 11.13 m,while the thickness of the vadose zone in Shunyi area decreased by 31.72 m from 45.83 m to 14.11 m.The results basically reflect the spatial and temporal changes of groundwater in the area,and the zoning results can further support groundwater management,groundwater policy formulation,and refined management of groundwater-type water sources.

关 键 词：密怀顺 地下水 地下水位 地下水升幅带 包气带 

分 类 号：X523[环境科学与工程—环境工程]