Spatio-temporal Variation of Groundwater Level in Miyun-Huairou-Shunyi Recharge Area Based on ArcGIS
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 km2,accounting for 29.67％of the study area.The mid-rise zone of groundwater level covers about 128.85 km2 accounting for 26.47％of the study area;the high-rise zone of groundwater level covers about 213.52 km2,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.
Miyun-Huairou-Shunyi recharge areagroundwatergroundwater levelgroundwater rise zonevadose zone
万方数据
维普
