IDENTIFIKASI PENCEMARAN AIRTANAH DENGAN METODE GEOLISTRIK DI WILAYAH NGRINGO JATEN KARANGANYAR

Oleh :
LEAN WIJAYA - M0205033 -

IDENTIFICATION CONTAMINATION GROUNDWATER WITH GEOELECTRICAL AT NGRINGO JATEN KARANGANYAR By Lean Wijaya M0205033 Geoelectrical resistivity surveys have been conducted using Schlumberger sounding configuration of 4 points at Ngringo Jaten Subdistrict Karanganyar District. Measurements were carried out using OYO model 2119C Resistivitimeters. Data was processed using IPI2Win Ver. 2.6.3a, with the results of processing in the form of depth, thickness and number of layers and the resistivity value. Results of data processing was determined based on the recommendation percentage error model with the smallest to the mapping information isoconductivity, geology, and the information well. The distribution of research results of groundwater pollution in the Village Ngringo is not evenly distributed. Contamination was identified in the depth of 13.6 - 23.6 meters with a flow direction from North to South with the regional distribution in the southern and at depth of 7.5 - 60 meters with a flow direction from west to east with the regional distribution in the east. Groundwater pollution does not occur in the distribution area to the northern aquifer identified with the depth of 157 meters. Distribution of overall groundwater pollution Ngringo Village Jaten Subdistrict is uneven, contamination happens as a consequence of contamination seepage from river at area with neighbourhood of less than 1 km from river. Keywords: resistivity, isoconductivity, groundwater pollution, distribution direction