Unconfined aquifer water has a greater exposure to contamination from external sources, such as rain, streams and rivers. Water that seeps into unconfined aquifers may also originate from urban sources, such as
2.1.2 Flow equations-confined and unconfined aquifer (2D) The governing equation describing the flow in a 2D nonhomogeneous confined aquifer is given as (Bear, 1979): (4)∂∂xTx∂h∂x+∂∂yTy∂h∂y=S∂h∂t+Qwδx−xiy−yi−qs The governing equation describing the fl...
Smith RJ, Jeffries TC, Roudnew B, Fitch AJ, Seymour JR, Delpin MW, Newton K, Brown MH, Mitchell JG. 2012. Metagenomic comparison of microbial communities inhabiting confined and unconfined aquifer ecosystems . Environ. Microbiol. 14 :240–253 [ PubMed ]Smith RJ, et al. 2012. Metagenomic...
What is a confined aquifer and an unconfined aquifer? Definition of an Aquifer: An aquifer is a layer of permeable sediments or rocks found underground that holds groundwater, whereby the permeability of the rock is dependent on its porosity and capacity to retain water. Water can be pumped fr...
1.infiltrate v.渗透 2.aquifer n.含水土层, 蓄水层 3.unconfined aquifer 非承压含水层 无压含水层 4.confined aquifer 自流含水层 承压含水层 5.recharge area 补给区 6.water table n. 地下水面(门窗泻水台)7.vadose zone 渗流区 8.aquitard 半透水层 弱含水层 9.aquiclude n.含水...
A three dimensional finite element model for fluid flow and transport in confined or unconfined aquifer : F. Jacob, J. M. Crolet, P. Lesaint & J. Mania, in: Water pollution III: modeling, measuring and prediction, ed L.C. Wrobel & P. Latinopoulos, (Computational Mechanics Publications)...
Tunnelling and Underground Space Technology, 2024, 153: 106023. 10. Guo, Y., Zhang, Z., Du, C. et al. An analytical solution for groundwater inflow of circle foundation pit with suspended waterproof curtains in the unconfined aquifer. Environmental Earth Sciences, 2024, 83(17): 525. ...
Keywords: Slope stability; Confined aquifer; Hydraulic conductivity; Factor of safety; Weathered igneous rocks; Saprolite; Kaolin; Clay 1. Introduction Heavy rainfall is a critical factor in triggering land- slides in Hong Kong because it generates rapid ...
A new solution of transient confined–unconfined flow driven by a pumping well is developed and compared to previous approximate solutions of Moench and Prickett [Moench AF, Prickett TA. Radial flow in an infinite aquifer undergoing conversion from artesian to water table conditions. Water Resour Res...
1. The leaky-confined aquifer rests on an impermeable bedrock or aquiclude while the upper adjacent aquifer is unconfined with an instantaneous drainage water table. Both aquifers are assumed to be slightly compressible, spatially uniform, vertically anisotropic and infinite laterally with constant ...