The Effectiveness of Sand Column Utilization in Recharge Reservoir as Seawater Intrusion Barrier
Akhmad Azis1, Hamzah Yusuf2, Sugiarto Badarudd3
1Akhmad Azis, Civil Engineering Department, Polytechnic State of Ujung Pandang, Makassar, Indonesia.
2Hamzah Yusuf, Civil Engineering Department, Polytechnic State of Ujung Pandang, Makassar, Indonesia.
3Sugiarto Badaruddin, Civil Engineering Department, Polytechnic State of Ujung Pandang, Makassar, Indonesia.
Manuscript received on November 27, 2013. | Revised Manuscript received on December 13, 2013. | Manuscript published on December 30, 2013. | PP: 237-240 | Volume-3, Issue-2, December 2013. | Retrieval Number: B2451123213/2013©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: Excessive groundwater exploitation may cause groundwater decline and induce the landward movement of seawater in coastal aquifer and generate sea water intrusion. One of the efforts to overcome sea water intrusion is groundwater recharge using recharge reservoir. In this research, a recharge reservoir is built on an area with permeability coefficient less than 10-5 cm/sec, analyzed using sand column model and put on the recharge reservoir base which is directly connected to the aquifer layer. The objective of this research is to explore the utilization of sand column subject to the amount of groundwater recharge obtained. This research is an experimental laboratory study that includes the main recharge reservoir model with and without sand column. The data resulted from the research consists of recharge rate entering the aquifer within various parameters: head level differences, sand column or soil layer thickness, and sand column density. Each parameter consists of three variables. Results of the research showed that the maximum debit obtained was 62.41 cm3/sec with 0.00157 of sand column density, 37.4 cm of head difference and sand column height is 30 cm. It is expected that results of this study are applicable and can be implemented in the field scale to cope with the problem of sea water intrusion.
Keywords: Recharge reservoir, Sand column, Sea water Intrusion.