近10年北京平原区地下水水位变化及与地面沉降的关系研究
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本文为国家自然科学基金青年基金项目(编号42102235)、中央级公益性科研院所基本科研业务专项(编号IGCEA2121)、北京市科技计划课题(编号Z191100001419007)和北京市财政项目(编号11000022T000000440128)联合资助的成果


Groundwater level changes and their impact on land subsidence in the Beijing Plain during the past 10 years
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    摘要:

    北京地区地下水过度开采引起的环境地质问题日益受到关注。2010年以来,北京实施了地下水压采、限采、生态补水等积极措施来缓解严重的地下水超采问题。为进一步分析2010年以来多项水资源管理措施的实施对区域地下水和地面沉降的影响,本文基于长序列监测数据,分析2010~2020年间区域地下水动态演化特征,量化不同措施对地下水水位下降减速的贡献,研究地下水水位回升条件下土层变形特征。结果表明:① 2010~2020年,平原区地下水水位下降速度减缓,在冲积平原大部分地区地下水水位仍持续下降,在冲积扇扇顶、扇中、扇缘及冲积平原的部分地区地下水水位出现大幅抬升现象。② 潮白河冲积扇顶、扇中和扇缘处地下水水位大幅抬升主要受潮白河生态补水影响;地下水压、限采是其他区域地下水水位大幅抬升的主要原因;生活用水的增加是导致冲积平原地区地下水水位持续下降的主要原因。③ 监测时段内第三和第四含水层组为主要沉降层,年沉降速率为11. 07~12. 80 mm/a;第一、二含水层地层出现少量回弹,最大累计回弹量为5. 6 mm。④ 水位抬升导致土体发生剪切膨胀,在此过程中地层存在两种变形模式,一种是与地下水水位变化同步的弹性变形,另一种是滞后于地下水水位变化的残余变形。本文研究成果为掌握不同水资源管理措施的效果,开展区域地下水资源管理及地面沉降精准防控提供有效技术支持。

    Abstract:

    There is a growing concern regarding the environmental geological problems resulting from the over- exploitation of groundwater in the Beijing area. In response to this, active measures such as groundwater mining restrictions and artificial recharge have been implemented since 2010 to address the severe groundwater shortage in Beijing. To further analyze the impact of the implementation of various water management measures on regional groundwater and land subsidence since 2010, this paper analyzes the dynamic evolution characteristics of regional groundwater during the period of 2010~2020. It utilizes long- term monitoring data, quantifies the contribution of various measures in decelerating the decline of groundwater levels, and investigates the deformation characteristics of soil layers under groundwater level recovery. The results show that: ① From 2010 to 2020, the rate of decline of groundwater levels in the plains slowed down. However, groundwater levels continue to decline in most areas of the alluvial plains, while experiencing a significant rise in the root fan, middle fans, fan margins, and some areas of the alluvial plains. ② In the Chaobai River basin, the significant rise in groundwater levels at the root, middle, and margins of the alluvial fan can be attributed to the artificial recharge of the Chaobai River; groundwater extraction restrictions are the main factors contributing to the significant rise in groundwater levels in other areas of the Beijing Plain; and the continuous decline in groundwater levels in the alluvial plain is primarily driven by the increase in domestic water use. ③ From 2010 to 2020, the third and fourth aquifer groups exhibit the most significant deformation layers, with deformation rates ranging from 11. 07 to 12. 80 mm/a. On the other hand, the first and second aquifer layers show rebound, with a maximum cumulative rebound of 5. 6 mm. ④ The dilation of soil caused by the rise of groundwater levels results in two types of deformation in the soil layers. The first type is elastic deformation, which occurs synchronously with the change in groundwater level. The second type is residual deformation, which lags behind the change in groundwater level. The results of this paper provide valuable technical support for understanding the effectiveness of different water management measures. These insights can contribute to the development of regional groundwater resource management strategies and the accurate prevention and control of subsidence.

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赵龙,蒋小伟,李玉梅,罗勇,崔文君,田苗壮,王树芳,田芳,许亮,刘元章,沙特,王新惠,齐鸣欢.2025.近10年北京平原区地下水水位变化及与地面沉降的关系研究[J].地质学报,99(5):1792-1806.
ZHAO Long, JIANG Xiaowei, LI Yumei, LUO Yong, CUI Wenjun, TIAN Miaozhuang, WANG Shufang, TIAN Fang, XU Liang, LIU Yuanzhang, SHA Te, WANG Xinhui, QI Minghuan.2025. Groundwater level changes and their impact on land subsidence in the Beijing Plain during the past 10 years[J]. Acta Geologica Sinica,99(5):1792-1806.

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  • 收稿日期:2023-01-10
  • 最后修改日期:2023-08-06
  • 在线发布日期: 2024-03-20