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| 基于时序InSAR的衡水市地面沉降与深层地下水关系研究 |
| The study of the relationship between land subsidence and deep groundwater in Hengshui City based on time-series InSAR |
| 投稿时间：2025-03-26 修订日期：2025-06-30 |
| DOI： |
| 中文关键词: 地面沉降 衡水市 SBAS-InSAR 深层地下水 |
| 英文关键词:Land subsidence Hengshui SBAS-InSAR Deep groundwater |
| 基金项目:水利部重大科技项目(SKR-2022054) |
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| 中文摘要: |
| 衡水市长期超采地下水导致深层地下水位持续下降,进而引发严重的地面沉降问题,威胁区域经济与生态环境的可持续发展。研究地面沉降的分布特征及其与深层地下水位的响应关系,对于防控沉降灾害、制定科学的地下水开发利用政策具有重要意义。本研究基于2018-2022年的SBAS-InSAR数据和深层地下水位监测数据,从多年平均、年际和月度三个时间尺度,分析了衡水市地面沉降与深层水位的变化特征与响应关系；采用交叉小波变换分析方法,定量研究了代表性点位地面沉降与深层地下水位演变的周期特征及时间滞后关系。研究结果表明：(1)衡水市在2018-2022年整体处于沉降状态,累计沉降量超过100mm的区域占比达86.54%,分别形成了饶阳至深州、冀州-枣强交界至阜城县-景县交界处两部分连片明显沉降区。(2)2018-2019年研究区处于“快速下沉”阶段,安平县和饶阳县沉降强度最大；2020年后为“缓慢下沉”阶段,深层地下水位的回升显著减缓了沉降速率,2022年平均沉降量降至4.7mm,但部分区域因突破历史最低深层水位故存在进一步沉降现象。(3)突破历史最低深层水位是沉降发生的关键驱动因素,由此诱发的非弹性压缩量是沉降量的主要组成部分,说明防控深层水位突破历史低值是治理地面沉降的有效手段。(4)六个代表性点位的地面沉降与地下水位变化平均滞后时间为38.83~66.99天,该地区含水层压实具有明显的滞后效应。本文研究结果可为衡水地区沉降防控、水资源管理和区域可持续发展提供科学依据。 |
| 英文摘要: |
| The long-term over-extraction of groundwater in Hengshui City has led to a continuous decline in the deep groundwater levels, which in turn has caused serious ground subsidence issues, threatening the sustainable development of the regional economy and ecological environment. Studying the distribution characteristics of ground subsidence and its response relationship with deep groundwater levels is of great significance for preventing and controlling subsidence disasters and formulating scientific policies for groundwater development and utilization. This study is based on SBAS-InSAR data and deep groundwater level monitoring data from 2018 to 2022. It analyzes the characteristics of ground subsidence in Hengshui City and its response relationship with deep groundwater level changes across three time scales: multi-year averages, inter-annual variations, and monthly fluctuations. Using the cross-wavelet transform analysis method, this research quantitatively investigates the periodic characteristics and time-lag relationships of ground subsidence and deep groundwater level evolution at representative points. The research results indicate that: (1) From 2018 to 2022, Hengshui City was overall in a state of subsidence, with areas experiencing cumulative subsidence of over 100 mm accounting for 86.54%. This has formed two distinct subsidence zones, one stretching from Raoyang to Shenzhou and the other at the junction of Jizhou-Zaoqiang to the boundary between Fucheng County and Jingxian County. (2) The study area was in a "rapid subsidence" phase from 2018 to 2019, with the highest subsidence intensity occurring in Anping County and Raoyang County. After 2020, it entered a "slow subsidence" phase, where the recovery of deep groundwater levels significantly slowed down the subsidence rate. By 2022, the average subsidence amount decreased to 4.7 mm; However, some areas continued to experience further subsidence due to surpassing historical minimum deep groundwater levels. (3) Surpassing historical minimum deep groundwater levels is a key driving factor for subsidence, and the resulting inelastic compression is the main component of the subsidence amount. This indicates that preventing deep groundwater levels from falling below historical lows is an effective measure for controlling ground subsidence. (4) The average time lag between ground subsidence and changes in groundwater levels at six representative points is 38.83 to 66.99 days, demonstrating a significant lag effect in the compaction of aquifers in the area. The findings of this study can provide a scientific basis for subsidence prevention and control, water resource management, and regional sustainable development in the Hengshui area. |
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