{"title":"Effects of Heavy Pumping and Artificial Groundwater Recharge Pond on the Aquifer System of Langat Basin, Malaysia","authors":"R. May, K. Jinno, I. Yusoff","volume":74,"journal":"International Journal of Geological and Environmental Engineering","pagesStart":114,"pagesEnd":123,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/9996949","abstract":"<p>The paper aims at evaluating the effects of heavy groundwater withdrawal and artificial groundwater recharge of an ex-mining pond to the aquifer system of the Langat Basin through the three-dimensional (3D) numerical modeling. Many mining sites have been left behind from the massive mining exploitations in Malaysia during the England colonization era and from the last few decades. These sites are able to accommodate more than a million cubic meters of water from precipitation, runoff, groundwater, and river. Most of the time, the mining sites are turned into ponds for recreational activities. In the current study, an artificial groundwater recharge from an ex-mining pond in the Langat Basin was proposed due to its capacity to store &gt;50 million m3&nbsp;of water. The location of the pond is near the Langat River and opposite a steel company where &gt;4 million gallons of groundwater is withdrawn on a daily basis. The 3D numerical simulation was developed using the Groundwater Modeling System (GMS). The calibrated model (error about 0.7 m) was utilized to simulate two scenarios (1) Case 1: artificial recharge pond with no pumping and (2) Case 2: artificial pond with pumping. The results showed that in Case 1, the pond played a very important role in supplying additional water to the aquifer and river. About 90,916 m3\/d of water from the pond, 1,173 m3\/d from the Langat River, and 67,424 m3\/d from the direct recharge of precipitation infiltrated into the aquifer system. In Case 2, due to the abstraction of groundwater from a company, it caused a steep depression around the wells, river, and pond. The result of the water budget showed an increase rate of inflow in the pond and river with 92,493m3\/d and 3,881m3\/d respectively. The outcome of the current study provides useful information of the aquifer behavior of the Langat Basin.<\/p>\r\n","references":"[1]\tDepartment of Environment (DOE), Environmental Quality Report. Ministry of Natural Resources and Environment, Malaysia, 2006.\r\n[2]\tJICA and MDGM, The study on the Sustainable Groundwater Resources and Environmental Management for the Langat Basin in Malaysia, 2002, Vol. 1-5.\r\n[3]\tFetter C.W., Applied Hydrogeology, 4th ed., 2001, Prentice Hall, New Jersey, pp139.\r\n[4]\tMcDonald M.G., Harbaugh A.W. A modular three-dimensional finite-difference ground-water flow model: Techniques of Water-Resources Investigations of the United States Geological Survey. US Geological Survey, Book 6, Chapter A1, Chapter 2, pp2-2, 1988.\r\n[5]\tAQUAVEO. GMS: GMS User Manual 8.3. Chapter 6, pp.314, 2012.\r\n[6]\tTsutsumi A., Jinno K., Berndtsson R. Surface and subsurface water balance estimation by the groundwater recharge model and a 3-D two-phase flow model, 2004, Hydrol Sci 49(2):205\u2013226.\r\n[7]\tDepartment of Irrigation and Drainage (DID), Online hydrological data. Retrieved April, 24, 2012. http:\/\/infobanjir.water.gov.my\/ve\/vmapsel.cfm\r\n[8]\tAqil M., Kita I., Yano A., Nishiyama S. Analysis and prediction of flow from local source in a river basin using a Neuro-fuzzy modeling tool, 2007, J Environ Manag 85(1):215\u2013223.\r\n[9]\tBirck M. D. Temporal variability of riverbed hydraulic conductivity at an induced infiltration site, Southwest Ohio. Miami University, A Thesis, 2006, pp.25. \r\n","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 74, 2013"}