Estimation of the Hydraulic Conductivity by Using Field Test

• Main Authors: Hui-Hsuan San, 三慧瑄
• Other Authors: Te-Hsing Chang
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/92407456468679789388

碩士 === 中原大學 === 土木工程研究所 === 97 === Bouwer and Rice is one of the estimation methods of slug test of obtaining the hydraulic conductivity, but it’s a synthetic value of fully drilling, do not know the hydraulic conductivity of each layers. Because of the phenomenon of the delaminated aquifer, so the Bouwer and Rice is the main method discussed in this research that purpose improving the synthetic value, because that can’t know the values of each layers. This research was based on the different circulating area of the recharge and recovery to get two formulas, use Newton-Raphson method to obtain the hydraulic conductivity values in double-layers aquifer. After verification we use the data of Dong Ju to apply to this model. According to the different ratio of transmissivity to discuss the variance, and execute the sensitivity analysis of the parameters to discuss the identifiability. Pumping test is another field test that estimating the hydraulic conductivity, it’s a large scale test that can get the hydro-geological parameters of wide range. Pumping test effected by boundary easily, according to Cooper-Jacob method, use the data of pumping test to draft the semi-log graph and obtain the hydro-geological parameters. When the pumping test encountered the boundary effect, the graph will show two different lines. If there is only one observation data, this method only knew the distance between the observation and boundary. In order to find the location of the boundary, we suggest using the data of one pumping well and two observations to determine the position of boundary, using the pumping test data of Dong Ju to discuss it.