SIMULATION OF SUBSIDENCE IN DIFFERENT COMPRESSIBLE LAYERS DUE TO GROUNDWATER WITHDRAWAL IN TAIYUAN,SHANXI,CHINA
会议名称：《第七届国际地面沉降学术研讨会》
会议日期：2005年
学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程]
关 键 词：Taiyuan city land subsidence simulation optimization compressible layer
摘 要：正When layered monitoring data of land subsidence is unavailable,determining the horizontal distribution of compression of each compressible layer is important for spatial planning of groundwater *** has been well known that distribution of clay interbeds in formations has great effect on the spatio-temporal pattern of land subsidence,but little has been known about the heterogeneous compression in each layer caused by non-uniform distribution of clay *** serious land subsidence has occurred due to excessive pumping of groundwater in Taiyuan City,Shanxi Province,*** it is impossible to stop drawing groundwater to control land subsidence in *** best choice is to adjust spatial arrangement of pumping wells,based on thorough investigation about compression behavior of each compressible layer. In this paper,a modular subroutine of MODFLOW called Interbed Storage Package-1 was employed to simulate the horizontal distribution of subsidence in different compressible layers in Taiyuan *** results show that clay layer 3,clay layer 1 and 2,and clay layer 4,5,6,and 7 contribute chiefly to the land subsidence in Xizhang sub-zone,Wanbolin and Xiayuan sub-zones,and Wujiabao and Xiaodian sub-zones, *** is suggested that both temporal and spatial arrangement of pumping wells must be taken into account to control land subsidence in *** from middle water-bearing zone in Xizhang sub-zone and from the lower water-beating layer in Wujiabao and Xiaodian sub-zones should be avoided.