Potential of Groundwater to Supply Domestic Water Necessity in Evacuation Shelters of Merapi Volcano Eruption

Since the occurrence of eruption in 2010, volcanic activity of Merapi volcano increased several times. Cangkringan district was the most affected area with highest level of damage. Learned from the 2010 eruption, mitigation action was developed by preparing more and adequate evacuation shelters. During period of staying in evacuation shelter, primary necessity of clean water for the refugees needed to be fulfilled. Groundwater was considerated to be the alternative source to fulfill the needs of clean water for the refugeess in evacuation shelters. However, the amount of groundwater sources on the area of evacuation shelter had to be able to meet the domestic water necessity of all refugeess. This research aimed to measure the potential's amount of groundwater on the surrounding area of evacuation shelter, particularly in Cangkringan district, and to identify the capability of groundwater to fulfill the refugees's domestic water necessity in the evacuation shelter in Cangkringan district. Dynamic groundwater discharge method by Darcy model was used to measure the prediction of potential groundwater. The result showed potential of groundwater in Cangkringan were as much 88,417.2 m³/day or 88,417.200 liter/day. Total water necessity of refugees in Cangkringan was 335,700 liters/day. Compared to the prediction value of groundwater potential, the total water necessity of refugees in Cangkringan was able to be fulfilled.