Determination of Hydraulic Conductivity Value by using Sunjoto Shape Factor

Abstract

Hydraulic conductivity, K value, is important for soil properties determination and there are many equations and method that can be used in this region. In 1951, Hvorslev introduced the shape factor method to determine K value that only depends on geometry of well. The geometry of well or shape factor is mainly focused on the length, screen and base of the groundwater well. Later, many researchers used this method and developed different kind of equations for different geometry of wells. Sunjoto also developed equations and shape factor to determine the K value. This method can be used easily by using iteration method. In this research, the comparison has been performed using constant laboratory test method and Sunjoto method. The experiment test was conducted in the laboratory and it took measurements for three tests. The Sunjoto equation was used for analysis to the experiment test measurements. The hydraulic conductivity value with constant head test is 0.00038 m/sec and with Sunjoto shape factor method is 0.000184 m/sec for test (1), 0.000180 m/sec for test (2) and 0.000119 for test (3). According to this comparison value, the hydraulic conductivity value is more acceptable when it uses shape factor method since the constant laboratory test is using disturb sample. Moreover, according to the result, Sunjoto method can be used as a new method to determine hydraulic conductivity value.