Establishing the Hydrostratigraphic Subdivision by Combination of Geostatistic and HGES

• Main Authors: Yi-Chang Chan, 詹益璋
• Other Authors: YIH-CHI TAN
• Format: Others
• Language: zh-TW
• Published: 1999
• Online Access: http://ndltd.ncl.edu.tw/handle/17999955217063144525

碩士 === 國立臺灣大學 === 農業工程學研究所 === 87 === Analyzing hydrogeological framework to establish the hydrostratigraphic subdivision of geological profiles are so important that researcher can understand the changing of the vertical properties of aquifers and aquitards. An excellent hydrostratigraphic profile needs numbers of well logging, electric resistivity, and foraminifers. Traditionally,two important steps are required. 1. Combination of detailing layers of well logging for engineering scale. 2. Comparing and connecting the layers along the profiles. The HydroGeology Expert System(HGES, Yang. Et al, 1996) provides a fast and accurate process in constructing subdivisions ,but the HGES is not able to provide accurate intersection between profiles and estimate the aquitard die-away. The purpose of the research is include two major steps,one is to combine the Kriging estimation and the HGES, and attempt to make complete hydrogeological framework of Choushui River fan . There have 54 wells are scattering in CHANG-HWA county and YUN-LIN county region that have been used as this reseach input data. the other is applied GEOEAS, a statistical program from EPA in USA,can be applied to analyze the experimental data with the theoretical variogram. Thickness and depth getting from HGES were used as the regionalized variables in this research. The result showed that this method can be used to provide complete regional hydrogeological properties and reasonable estimation of the aquitard die-away.