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Abstract-Objectives to be achieved from the program science and technology for the Community (IbM) This is a crisis of groundwater that occur in the District Maradekaya, Makassar City can be resolved as well as long term targets is to encourage the local government of Makassar for the decision on the obligation for the people of Makassar making infiltration wells in his yard. The method will be used in these activities in the form of counseling for people in RW 03 and RW 04 about the dangers of groundwater in case of crisis, the way of making infiltration wells as well as manufacture in 5 homes in every RW (RW 03 and RW 04). The test results of water after infiltration wells through which rainwater is the quality of well water for the better. It is characterized by a decrease in turbidity of 27,5 %, NaCl 11,5 %, Sodium 12,3% and Chloride 11,1%. Keywords-soil water conservation; recharge wellsAbstrak-Tujuan yang ingin di capai dari program Ipteks bagi Masyarakat (IbM) ini adalah krisis air tanah yang terjadi di Kelurahan Maradekaya Kota Makassar dapat teratasi serta target jangka panjangnya adalah dapat mendorong Pemda Kota Makassar untuk membuat Perda tentang kewajiban bagi masyarakat Makassar membuat sumur resapan di pekarangan rumahnya. Metode yang akan digunakan pada kegiatan ini berupa penyuluhan bagi masyarakat di RW 03 dan RW 04 tentang bahaya jika terjadi krisis air tanah, cara pembuatan sumur resapan serta pembuatan di 5 rumah warga di setiap RW (RW 03 dan RW 04). Hasil pengujian air setelah sumur resapan dilalui air hujan adalah kualitas air sumur menjadi lebih baik. Hal ini ditandai dengan penurunan kekeruhan sebesar 27,5 %, NaCl 11,5 %, Natrium 12,3 % serta Klorida 11,1 %.Kata Kunci-konservasi air tanah; sumur resapan

Excessive groundwater exploitation may lead to groundwater depletion, causing groundwater level at the inland lower than sea level and result in seawater intrusion (SWI) in a coastal aquifer. To control the occurrence of SWI, an alternative solution is to increase the replenishment of groundwater using a recharge reservoir. If a recharge reservoir is built in a region with soil hydraulic conductivity below 10-5 cm/s (semi impermeable), then a sand column is usually proposed, put on the bottom of the recharge basin and directly connected to the aquifer layer. The purpose of this study is to analyze the effectiveness of the sand column’s application in the recharge reservoir to control SWI. This research is an experimental study that combines physical and numerical modeling of the recharge basin with sand columns under a laboratory scale. The results of this research are beneficial for field applications because the process that occurs in the recharge reservoir can be determined prior to the real construction in the field. The results of the research are also useful to investigate whether the recharge reservoir is effective or not as a buffer of SWI in coastal aquifers. The expected result is that by using sand columns in the recharge basin, seawater intrusion can be controlled. It is hypothesized that the higher the number of sand column density and water level on the reservoir, the farther the freshwater saltwater interface is pushed toward the sea.

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The study aims to determine the suitable location of biopore infiltration holes by utilizing Geographic Information Systems Software (GIS) in adopting appropriate technologies Biopore Infiltration Hole (LRB) at inundation areas in the eastern city of Makassar. The analysis of this study is conducted in the form of qualitative analysis which to identify the type of soil in the research and as well as quantitative analysis to determine the suitable location applied in Biopore Infiltration Hole (LRB). In the outline, the concept of applying the analysis technique of superimpose with the three variables of determining analysis location of Biopore Infiltration Hole (LRB) such as soil type, rainfall and built coefficient region. The results of this study indicate that the three sites are suitable to be applied Biopore Infiltration Hole (LRB), namely; location IV (RT 3 RW 6 Berua), location V (RW 7 Mangga Tiga) and the location VI (RW 16 Blok Ae BTP) in Paccerakkang village which each location requires a number of absorption biopore holes as much as 84,417 for IV location, 6,894-6,644 locations V and VI for the location.The utilization of GIS Software in implementing Biopore Infiltration Hole (LRB) obtained a map view location which is suitable to be applied for biopore hole absorptions and the number of needs in the region.