Penentuan Kebutuhan Air Baku Untuk Hunian Tetap Penyintas Erupsi Gunungapi Semeru

The Semeru Volcano eruption in 2021 has a wide impact on aspects of community livelihoods in Supiturang Village, Pronojiwo Subdistrict and Sumberwuluh Village, Candipuro Subdistrict, Lumajang, East Java and forced 1,951 survivors to be relocated to the Sumbermujur Village shelter. It is suspected that there is a lack of studies on the planning for the development of shelters, especially in matters of meeting the needs of raw water. The method of implementing community service is carried out using research methods to ensure the availability of raw water sources needed by 1,951 families who will live in shelters. From the identification results, the total need for raw water in the shelters in Sumbermujur Village reached 305.663.17 liters/day. From the interviews, there are 3 springs which are the main supply of raw water for temporary shelters with a total discharge of 35 liters/second or 126,000 liters/day. There is a deficit between the availability and the need for raw water for survivors in the shelters of up to 58.78%. The results of the identification of groundwater aquifers using the geoelectric resistivity method indicate that the deep aquifers around the huntap tend to be unproductive and economical to be used on a large scale, while the aquifers that allow for use are shallow aquifers at a depth of 8 – 18 meters with sustainable management efforts. The sustainable effort is in the form of planting groundwater by maintaining or adding green areas and making biopore holes or wells. With the aim that surface water can be channeled into the soil through trees and biopores, and maintain the capacity of the aquifer to minimize the risk of dryness