中国水利Issue(11)：45-51,7.
利用重力卫星监测区域地下水储量对郑州"7·20"特大暴雨的响应
Monitoring regional groundwater reserve by gravity satellite and its response to the"July 20"catastrophic rainstorm in Zhengzhou
摘要
Abstract
In the context of frequent extreme precipitation events,understanding the response of depleted aquifers to rainfall events has become a new challenge for groundwater resource management under the influence of climate change and human activities.Taking the catastrophic rainstorm in Zhengzhou on July 20,2021,as an example,this study leverages the advantages of gravity satellites in monitoring large-scale mass changes to reveal the impact of extreme rainfall on the groundwater reserve changes in regional aquifer systems under long-term over-extraction.The study found that the GRACE gravity satellite could clearly capture the increase in groundwater reserves caused by this rainfall event,with a correlation coefficient of 0.84 between gravity satellite data and well observations.The rainfall event resulted in a cumulative increase of 13.278 billion cubic meters of groundwater reserves in the study area(379 100 km²)as of the end of November 2021.The groundwater recharge coefficient(the ratio of groundwater recharge to rainfall)for this event reached 0.36,significantly higher than the average recharge coefficient of 0.19 for historical rainfall events,indicating the unique recharge capacity of heavy rainfall on regional aquifers.This study shows that extreme rainfall has a significant recharge effect on depleted aquifers,and gravity satellites have potential in assessing the impact of extreme rainfall events on regional groundwater reserve changes.关键词
重力卫星/地下水储量变化/极端降水/地下水补给/郑州暴雨Key words
gravity satellite/groundwater reserve changes/extreme rainfall/groundwater recharge/Zhengzhou rainstorm分类
建筑与水利引用本文复制引用
潘云,陈文泽,张翀..利用重力卫星监测区域地下水储量对郑州"7·20"特大暴雨的响应[J].中国水利,2024,(11):45-51,7.基金项目
北京市自然科学基金(8232021) （8232021）
国家自然科学基金(42071397,41771456,42201345). （42071397,41771456,42201345）
