The Characteristics of thermal Water in High Geothermal Potential Area of Ilan, Taiwan

Abstract

This is the first study to monitor thermal water in high geothermal potential area of Ilan of Taiwan. The geothermal power plant of Chingshui Geothermal Field existed between 1980 and 1993, and it had a serious problem of calcite scaling. This study expects provide information for solving problem of calcite scaling. This study collects thermal water, surface water, which are located between Tuchung area and Chingshui Geothermal Filed, from July 2018 to August 2019. We collect 6 surface waters and 4 thermal waters in the Tuchung area, and 3 surface waters and 3 thermal waters in the Chingshui Geothermal Field. In the Tuchung area, the solid solution of surface waters, thermal waters are less than 500 ppm and from 1,000 ppm to 3,500 ppm, respectively. In the Chingshui Geothermal Feild, the solid solution of surface waters, thermal waters are less than 500 ppm and from 2,500 ppm to 3,500 ppm, respectively. The thermal waters of Tuchung-Chingshui Geothermal Field belong to Na-HCO3-. In the Tuchung area and Chingshui geothermal filed, the rock belongs to argillite, slate, and meta-sandstone, and consists of quartz, calcite, muscovite, and clay minerals. Finally, we will simulate the process of water-rock interaction by the Geothermist’s Workbench software.