Monitoring of rainfall infiltration to under surface using DC resistivity method

Abstract

The use of non-agricultural land in Universitas Pendidikan Indonesia causes the land absorption to be smaller than the use of soil for agriculture so that it can lead to surface runoff. This study discusses how to monitor rainwater infiltration to subsurface using resistivity method with Wenner's configuration and weather data. The data retrieval takes place twice with a span of two months and is in the same place. In the model is also seen when the layer of purple rocks have decreased in volume from the first data retrieval on the second data retrieval. While the rain water infiltration layer more evenly. Monthly weather reference data showed that temperature and evapotranspiration relationships over the months showed the results from September to December were relatively stable with average temperatures of four months being 22.38 °C and evapotranspiration was 5.02 cm / month. Therefore, the evaporation caused by all water, soil, vegetation and the earth's surface located at the site is 5.02 cm / month. Monitoring of rainfall infiltration within two months from the first measurement having rainfall infiltration of 3.9 mm / h indicates that infiltration rate is very fast and the magnitude of evapotranspiration is 5.02 cm / month.