Identification of Groundwater Resourcezonation and Groundwater Protection Area in Banyuwangi Regency

Groundwater as water resources requires special attention in order to be utilized in a sustainable manner. Utilization of groundwater that does not consider ecological aspects have shown the negative impact that a decline in quantity and quality of groundwater and the environment as has happened in big cities in Indonesia. therefore to the protection of groundwater resources requires the Groundwater Protection Area. In this study conducted assessment to determine the Groundwater Protection Area in the regency of Banyuwangi as a protected area that will be accommodated in the Spatial Plan Banyuwangi. Components of the study consisted of the analysis of geology, topography, hydrology, climatology, and hydrogeology as input for determining the zoning of groundwater and aquifer potential of the basis for determination of the Groundwater Protection Area. Based geoelectric data, there are two layers of the aquifer, unconfined aquifer, the depth of this aquifer are so varied and the quality was good except for the south-southeast which is brackish; second is confined aquifer located in the north-east and the south, with the category of fresh water. By reference to the value of electrical conductivity of 5-30 S/cm (Mandel, 1981) as a water catchment area for regional water catchment system located at an altitude between 280-800 meters above sea level. Groundwater Protection area is obtained by spatial analysis and weighting of the value of Land type, recharge area, land use and water balance; then produced three protection area categories, namely primary, secondary and development catagory. Primary Groundwater Protection area category is dominated by forests and plantations; confined aquifer zone is contributed by unconfined aquifer in the protected area above it.