Groundwater Potential of Limestone Terranes--Examples from Indonesia: ABSTRACT

The groundwater potentials of the areas of Gunung Kidul, central Java, and Lenteng on Madura Island are typical of limestone terranes in Indonesia. In the Gunung Kidul area, southward dipping middle Miocene limestone, about 200 m thick, is deeply dissected by solution channels which probably follow fractures. The whole area exhibits a typical karst morphology. Baron spring on the south coast of Java has a dry- and rainy-season discharge that fluctuates between 6 and 20 cu m per second. This spring is thought to be the main outlet through which the area is drained. Two groups of aquifers are present in the Lenteng area, one between 8 and 70 m below ground surface and the second below 228 m. In the proximity of Lenteng Village the groundwater potential of the upper group is 0.33 cu m per second. Both areas have a relatively dense population (about 400 persons per sq km), but the groundwater potential at present is practically untapped. End_of_Article - Last_Page 1455------------