Influence of Rainfall and Vegetation Against Unconfined Groundwater Potential Withing Coral Sand Layer in Satando Island at Pangkep Regency, South Sulawesi
Sultan1, A. M. Imran2, M. Arsyad Thaha3, dan Muhammad Ramli4

1Sultan, Doctoral Student of Civil Engineering, Postgraduate,Hasanuddin University, P. Kemerdekaan KM-10 Makassar, Indonesia.
2A. M. Imran, Lecturer , Department of Geology Engineering, Hasanuddin University, Makassar, South Sulawesi, Indonesia.
3M. Arsyad Thaha, Lecturer , Department of Civil Engineering, Hasanuddin University, Makassar, South Sulawesi, Indonesia.
4dan Muhammad Ramli, Lecturer, Department of Geology Engineering, Hasanuddin University, Makassar, South Sulawesi, Indonesia
Manuscript Received on December 16, 2015. | Revised Manuscript Received on December 18, 2015. | Manuscript published on December 20, 2015. | PP: 11-17 | Volume-3 Issue-12, December 2015. | Retrieval Number: L06781231215/2015©BEIESP
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Abstract: Population growth in the island will affect water resource potential in island, addition to geological conditions and rainfall. For that reason, this research aimed to see influence of rainfall in the island Satando against potential unconfined groundwater in the coral sand layer in the area of this small island, which will be useful to provide information to local governments and communities of the island on the importance of maximizing rainwater there to sink in and get into the coral sand layer in the area so as to preserve the unconfined groundwater on the island. The research method is done by several approaches include literature and secondary data, field activities of primary data for measuring the condition of the surface of the groundwater in wells resident on the island Satando totaling 20 wells during the rainy season, a season of transition and drought as well as the compilation of all data obtained. Based on data from groundwater level changes are correlated with conditions and intensity of rainfall that occurred on the island, then analyzed influence of rainfall on the unconfined groundwater potential in the coral sand layer Satando island. Total population of 537 inhabitants, require minimal fresh water a year 11767,3M3 , potential water on the Satando island a year 10557.7 meter3 , so that the deficit needs 1209.6 M3 is causing water shortages island residents about 68 days (2 months). Dependence potential of water in wells in coral sand layerwith the intensity of the rainfall conditions that occurred on the Satando island for 33.69% of the intensity of daily rainfall that occurred.The influence of vegetation in particular the effect of very significant breadfruit tree roots where the potential wells are nearby existing vegetation is greater than the breadfruit tree that has no vegetation. Policy management of groundwater on Satando island is to control the use of water and disposal of remnants channeled into absorption wells were created in the yard, arranging the disposal of household waste and toilet, as well as any home maked rainwater tanks. Residents must control and controlling the birth rate and improve the level of education of children of school and also preserve breadfruit tree vegetation with replant and increase the population in the side yard to plant vegetables and other seasonal fruits.
Keywords: Rainfall intensity, resident dug well, coralsand, unconfined groundwater.