Using geographically weighted regression to explore the spatially varying relationship between land subsidence and groundwater level variations:Acase study in the Choshuichi alluvial fan, Taiwan
Land subsidence mainly caused by excessive extraction of groundwater is a growing and worldwide problem. Sustained decline in groundwater level has a direct impact on land surface elevation. However ,The spatially varying relationship between land subsidence and groundwater level variations remains unclear. This study explores the spatio-temporal changes based on the observed data of groundwater levels and benchmark elevations from 2002 to 2009in the Choshuichi alluvial fan of central Taiwan and examines the spatial heterogeneity with geographically weighted regression (GWR).The results reveal that the occurrence and development of land subsidence is closely related to the groundwater pumping.Moreover,the influence of groundwater level on land subsidence is more significant in the inland area.The study can help to predict the land subsidence caused by the overdraft of groundwater and provide an explicit strategy for groundwater resource management.
spatial heterogeneity geographically weighted regression landsubsidence groundwater level Taiwan
Rong-Kang Shang Yi-shiang Shiu Kuo-Chen Ma
Department of Geography, National Taiwan University No.1,Sec.4,Roosevelt Road,Taipei,10617 Taiwan Department of Bioenvironmental Systems Engineering,National Taiwan University No.1,Sec.4,Roosevelt R
国际会议
福州
英文
21-25
2011-06-29（万方平台首次上网日期，不代表论文的发表时间）