Land subsidence of coastal area of western Taiwan from leveling observations

• Main Authors: Kun-ting Yang, 楊昆庭
• Other Authors: Ruey-Juin Rau
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/42967244750565587329

碩士 === 國立成功大學 === 地球科學系專班 === 95 === There are several factors causing land subsidence, including the uneven distribution of water pumping. The rapid development of aquaculture industry in the coastal areas of Taiwan has also resulted in ground subsidence due to over pumping of ground-water. Precise leveling is a traditional technique of height difference measurement. The way of precise leveling is taking by each station forwards step by step, the adjustment result of leveling network is then corrected by reducing the systematic error of observations. The major themes of this research are analyzing the 2003-2006 leveling observations in the western coastal area. Results indicate 1-6 cm subsidence every year, and land subsidence has become a serious problem in the Yun-Lin and Chia-yi areas. Some areas in Yun-Lin and Chia-yi will below the sea level after 30-40 year.