河海大学学报（自然科学版）2025，Vol.53Issue(5)：116-126,11.DOI:10.3876/j.issn.1000-1980.2025.05.014
地下构筑物对地下水头和滞留时间的影响机制
Influence mechanism of underground structures on groundwater head and retention time
摘要
Abstract
According to the definition of the barrier effect of underground structures,the concept of equivalent barrier depth was introduced.Analytical solutions for the groundwater head,groundwater retention time distribution,and average retention time in the urban confined aquifer under three boundary conditions of constant flow rate,constant head,and diffuse recharge were derived.Numerical experiments were set up to verify the results,and the results show that the analytical solution is in good agreement with the numerical solution.The results demonstrate that the analytical solution is in strong agreement with the numerical solution.However,the fitting performance deteriorates due to hydrodynamic dispersion when the dimensions of the underground structure are relatively large.Moreover,the analytical solutions of the average retention time agree well with the numerical results in various simulation cases(with a relative error of no more than 5.94％).Even in the three-dimensional flow field,the derived analytical solutions can be used to estimate the average retention time of confined aquifers.Finally,the analytical solution is applied to the confined aquifer flow field before and after the construction of four subway stations in Chengdu Metro Line 2.The calculation results show that compared to the head,the retention time is more sensitive to the parameters of underground structures.关键词
地下水滞留时间/解析解/承压含水层/地下水流场/地下构筑物Key words
groundwater retention time/analytical solution/confined aquifer/flow field/underground structure分类
天文与地球科学引用本文复制引用
井淼,杨思敏,刘瑾,张刚,杨跃,孙梦雅,马青山,鲁春辉..地下构筑物对地下水头和滞留时间的影响机制[J].河海大学学报（自然科学版）,2025,53(5):116-126,11.基金项目
国家自然科学基金青年科学基金项目(52109012) （52109012）
国家自然科学基金长江水科学研究联合基金项目(U2340212) （U2340212）
江苏省自然资源科技项目(JSZRKJ202507) （JSZRKJ202507）
