NERACA AIR DI PULAU BALI

Abstract

As a main destination of tourism in Indonesia, Bali develops rapidly. The impact of this phenomena is the increasing of water need in some sectors, whereas the available of water is constant. There are two objectives of this research. First, to calculate water available and water need in the research area, and second to analysis the water balance. Water available cover groundwater, rivers water and springs water, whereas water need cover domestic usage, industrial and hotel usage, cattle, fishery and irrigation. Groundwater is estimated by water balance concept, river water and spring data is collected from BPSDA Bali Province, whereas the water need is counted base on secondary data that collected from some departments in Bali Province. As a result, show that the water available in Bali Island is 2.604.483.300 m3/year, which consist of groundwater 693.296.200 m3/year, rivers water 1.903.678.000 m3/year and springs 7.509.600 m3/year. The water needs reach 1.213.625.300 m3/year, which consist of domestic usage 121.276.260 m3/year, industrial and hotel usage 20.038.068 m3/year, cattle 31.272.435 m3/year, fishery 125.305.574 m3/year and irrigation 915.733.000 m3/year. Base on the water balance ratio, it is known that the number of ratio is 47%, that it means almost in critical point.