中国 2021 年郑州极端天气的地表时间序列响应与变形原因分析

IF 2.9 3区 地球科学 Q2 ASTRONOMY & ASTROPHYSICS
Jiahao Li, Guowang Jin, Xin Xiong, Lv Zhou, Hao Ye, Quanjie Shi, He Yang
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引用次数: 0

摘要

城市地表的异常变形威胁着人类的生存环境,而区域极端天气会影响地表变形的响应规律。为探讨郑州地区极端天气后地表时间序列响应的变化及地表形变的成因,利用MTInSAR获取了2020年至2022年的地表形变,并利用GRACE检索了地下水等效水位高度的时间序列变化。结果表明(a) 郑州有三个大的沉降盆地,最大沉降速率为-40.2 毫米/年。(b) 郑州的特大暴雨迅速缓解了地表变形,持续时间约为 6 个月。然而,特大暴雨后地表仍出现下沉。郑州地区弹性骨架的蓄水系数呈上升趋势。(c) 降水可通过影响地下水位的变化导致地表隆起。特征区域地下水位变化与地表隆起响应之间存在 0.75-1 个月的延迟时间。这些结果为郑州市防灾减灾、减少异常变形提供了科学的数据支持和成因分析。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Surface Time Series Response and Deformation Cause Analysis in 2021 Zhengzhou Extreme Weather, China

Surface Time Series Response and Deformation Cause Analysis in 2021 Zhengzhou Extreme Weather, China

The abnormal deformation of urban surfaces threatens the human living environment, and extreme regional weather can affect the response law of surface deformation. To explore the changes in surface time series response after extreme weather and the causes of deformation in Zhengzhou, the MTInSAR was used to obtain the surface deformation from 2020 to 2022, and the time series changes of groundwater equivalent water height were retrieved by GRACE. The results show that: (a) There are three large subsidence bowls in Zhengzhou, and the maximum subsidence rate is −40.2 mm/yr. (b) The extreme rainstorm in Zhengzhou alleviated the surface deformation quickly, lasting approximately 6 months. However, surface subsidence still occurred after the extreme rainstorm. The water storage coefficient of the elastic skeleton in the Zhengzhou area showed an increasing trend. (c) Precipitation can lead to surface uplift by influencing the change of groundwater level. There is a delay time of 0.75–1 month between groundwater level change and surface uplift response in the characteristic region. These results provide scientific data support and causal analysis for disaster prevention and reduction of abnormal deformation in Zhengzhou.

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来源期刊
Earth and Space Science
Earth and Space Science Earth and Planetary Sciences-General Earth and Planetary Sciences
CiteScore
5.50
自引率
3.20%
发文量
285
审稿时长
19 weeks
期刊介绍: Marking AGU’s second new open access journal in the last 12 months, Earth and Space Science is the only journal that reflects the expansive range of science represented by AGU’s 62,000 members, including all of the Earth, planetary, and space sciences, and related fields in environmental science, geoengineering, space engineering, and biogeochemistry.
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