Empirical relationship between soil permeability and resistivity, and its application for determining the groundwater gross recharge in Marpoyan Damai, Pekanbaru, Indonesia

摘要

In this article, a novel approach to measuring the gross groundwater recharge rate over a district area is presented.rnIt is based on soil resistivity measurements. It is nondestructive, and allows quick, low-cost mappingrnof infiltration over large areas, which makes it particularly relevant for land planning. An empirical relationshiprnbetween soil resistivity, ρ, and permeability, k, must be established before the permeability is related to therngross recharge rate theoretically. The method has been applied in Marpoyan Damai, Pekanbaru, Indonesia.rnThe empirical relationship between resistivity and permeability was determined as log k=-0.1588 ρ+ 6.628.rnThe administrative districts within Marpoyan Damai with the lowest and highest annual gross groundwaterrnrecharge rate were found to be Wonorejo (about 61,000 m~3/a for a 0.3 km~2 drainage area) and East Sidomulyorn(about 881,000 m~3/a for 1.44 km~2).