水文地质工程地质2025，Vol.52Issue(3)：28-42,15.DOI:10.16030/j.cnki.issn.1000-3665.202409073
新水情影响下华北平原深层地下水水平衡演变与更新能力分析
Evolution of deep groundwater balance and renewability analysis in the North China Plain under new hydrological conditions
摘要
Abstract
Groundwater serves as a vital water resource supporting the socio-economic development of the North China Plain.Long-term overexploitation of deep groundwater and a significant decline in groundwater levels have led to a series of ecological and environmental geological problems.Since 2015,new hydrological conditions—such as water source replacement,regular ecological water replenishment,and comprehensive management of overexploitation of groundwater—have influenced deep groundwater dynamics by reducing extraction through alternative water supplies,agricultural water-saving measures,and heavy precipitation-based irrigation.Consequently,the deep groundwater balance has undergone substantial changes.This study used groundwater balance calculation to study the characteristics of key indicators of water balance changes.Using two geological background indicators,14C age and the distribution characteristics of the middle Pleistocene lithofacies paleogeography,and four hydrologic evaluation indicators,permeability,hydraulic gradient,the difference in groundwater levels between shallow and deep layers,and the interflow coefficient,the renewal capacity of deep groundwater was evaluated.Based on groundwater depression cones and land subsidence,thresholds for groundwater level recovery are identified to scientifically estimate the sustainable yield of deep groundwater.Compared to 2005,the lateral replenishment in 2020 increased by 0.25×108 m3,and interflow replenishment increased by 0.88×108 m3.These are primarily because the deep groundwater level in the middle and eastern part is still declining;The average annual exploitation of groundwater decreased by 1.41×108 m3 and the reduction in groundwater storage has changed from 12.29×108 m3 to 9.70×108 m3.Spatial analysis indicates that the renewal capacity in the piedmont plains is better than that in the central and eastern regions because of the larger hydraulic conductivity.Temporal analysis shows that the renewal capacity of deep groundwater in 2020 has generally increased compared to 2005.The composition and quantity of vertical interflow replenishment and horizontal lateral replenishment change with the change of mining yield.The availability of deep groundwater was evaluated to be 8.52×108 m3/a,primarily concentrated in the middle Pleistocene alluvial fan region of the piedmont plains.Based on the conditions of recharge,flow,and discharge of deep groundwater,as well as differences in the degree of development and utilization,the imbalance of deep groundwater has been alleviated since 2015,fundamental reversal has not yet been achieved.This study provides critical insights into deep groundwater circulation dynamics and offers guidance for the sustainable development and management of groundwater resources in the North China Plain.关键词
华北平原/新水情/水平衡变化/地下水更新能力/可持续利用对策Key words
North China Plain/new hydrological conditions/changes in water balance/renewability of groundwater/sustainable utilization strategies分类
地质学引用本文复制引用
杨会峰,李泽岩,孟瑞芳,白华,宋博,郭伟,包锡麟..新水情影响下华北平原深层地下水水平衡演变与更新能力分析[J].水文地质工程地质,2025,52(3):28-42,15.基金项目
国家自然科学基金地质联合基金项目(U2244214) （U2244214）
中国地质调查局地质调查项目(DD20230078 （）
DD20221752) （）
河北省创新能力提升计划高水平人才团队建设专项(225A4204D) （225A4204D）
