Abstract
Monitoring of underground water level with integrated data of geoelectric, logging, cutting and pumping has been done in industrial area of Candi Sub-district, Sidoarjo, which is productive aquifers with widespread area. The integrated study showed that monitoring aquifers in industrial wells has carried out at depths of 140-165 meters. The lithology of the aquifer layer consists of sand layer, clay, and gravel with a low resistivity value of 14.7 to 46.8 ohmmeters. The monitoring results showed that the use of underground water at night was higher than the day and the use on workday was higher than on holiday. The stable debit generated by monitoring wells was 8.41 lt/sec and the groundwater level would return to stable 2.17 meters if the well is rested for 3 hours. The implication of this study was monitorable of the dynamics underground water levels periodically.
Highlights
The development of the Candi subdistrict, Sidoarjo into an industrial area was followed by a large number of open land changed to be a large residential and industrial land
Study on Industrial Well Data Based on a survey about the presence of industrial wells in Candi sub-district (Figure 2), industrial wells in this research area were 10; 4 at PT Ecco with, 1 at PG Candi, 2 at Sumban, and 3 at Gelam area
The distribution of industrial wells was shown in table 1
Summary
The development of the Candi subdistrict, Sidoarjo into an industrial area was followed by a large number of open land changed to be a large residential and industrial land. The use of open land affects the amount of rainwater infiltration into the ground. Stable underground water condition would save an area from water crisis (Eke & Igboekwe, 2011) and the intrusion of sea water. D. Ayu - Underground Water-Level Monitoring by Integrated Study
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