The Fundamental Of Land Subsidence And Case Studies Due To Groundwater Withdrawal

The confined aquifer system responds to fluid withdrawal as adynamic unit whose elemental volumes not only compress due to decrease inporosity but move horzoontally and vertically in order for the system to remain contiguous. When that consideration transform to influence seepage field, should consider the unit to move to influence seepage field and transform to influence hydraulic conductivity, This paper passes the theories analysis to deduce out to the seepage equation for the unit moving, and through a example study the influence to seepage field with consideration unit move and taking no account of unit move.This paper subsides for Skeletal Movement problem due to groundwater withdrawal, it is foundation to the mutual influence of seepage with stress and the couple mechanism of interaction, make a new mathematical model of skeletal movement in confined aquifer. Inspect fitness for purpose and the validity of this mathematics model with example.Based on the mechanism analysis of land subsidence from groundwater pumping in foundation pit, a formula for account of land subsidence was presented. Through case study and analysis of alternative plans, a variety ofpreventing measures were proposed due to groundwater withdrawal and applicability to preventing measures of land subsidence were analyzed.