Saturated-unsaturated seepage simulation and hydrological dammodelsforquantifying the heterogeneity to hydrological state variables: Impacts of auxiliary structures andleakage anomalies
发布时间：2025-05-28
点击次数：
所属单位：中南大学
发表刊物：International Journal for Numerical and Analytical Methods in Geomechanics
项目来源：国家自然科学基金
关键字：heterogeneous earth dams, hydrological state variables, saturated-unsaturated seepage, smoothed finite element method International Journal for Numerical and Analytical Methods in Geomechanics
摘要：Seepage analysis is the central issue in solving the unconfined seepage problems from complex earth-rock dams. The precision and efficiency of seepage simulation are the major technical barriers to exploring the heterogeneities of hydrological state variables in dams. This paper addresses the heterogeneity of the saturated-unsaturated zones of dams and develops the smoothed finite element method (S-FEM) capable of solving the seepage problem in domains with arbitrary geometry and continuously varied permeability. The gradient smoothing technique, in which the area integrals are transformed into the line integrals around edges of smoothing cells, is used to obtain the element matrices, which is used to simplify the solution of seepage problem. To be specific, we employ van Genuchten method to modify the hydraulic conductivity of unsaturated zones mediumandSignorinicondition to convert the outflow boundary into the water head boundaries. The precision of the proposed method together with the importance of considering the unsaturated zones are first deliberated by the verification tests. Then, to quantify the impacts on the hydrological state variables, wefocus on the heterogeneity of the entire zones through exploratory tests. The results show that the presence of leakage anomalies and auxiliary dam structures has a significant effect on the redistribution of hydrological state variables, which convinces that the findings may lay the foundation for the development of multiparameter seepage inversion and the derivation of coupled hydro-geophysical inversion using the most appropriate starting model.
合写作者：Qianwei Dai, WeiZhou, JunshengYang
第一作者：Yi Lei
论文类型：期刊论文
通讯作者：BinZhang
是否译文：否
收录刊物：SCI