Abstract
Effective and rational management of groundwater resources require adequate information on the groundwater flow interactions with surface water and chemical species in the flow regime. The hydrologic conditions beneath the unlined ex- landfill site in Jinjang Kuala Lumpur were investigated to understand the groundwater flow and geochemical setting in which contaminants transport in the groundwater may occur in the ex-landfill. The MODFLOW 2000 was used to construct the groundwater flow regime. The model was set up and calibrated as a three (3) layer steady-state MODFLOW model. The MODFLOW model revealed that the hydraulic gradient of the groundwater flow in the landfill site is to the north-east, towards Jinjang River which is located on the eastern part of the landfill. There is also groundwater movement towards the south-east of the landfill towards the Nanyang and Wahyu Ponds. It was concluded that quick action is deemed necessary to protect Jinjang River and Nanyang Pond which are hydraulically connected with the same aquifer and the geochemical setting in which contaminants transport may occur in the ex-landfill is in the same direction as the flow of the two water bodies. Recommendations are suggested to reduce the groundwater level by pumping below the height of the river bed, so that there is no contamination to the river and pond via recharge of groundwater into the river, instead the river should recharge to the groundwater.
Highlights
Pollution, mismanagement, over depletion, climatechange, escalating population, national development projects, industrial and agriculture development are among the major problems linked to water quality issues around the globe
There is the Taman Beringin Transfer Station on the northern part, owned by the management authorities known as Dewan Bandaraya Kuala Lumpur (DBKL) or Kuala Lumpur City Hall (KLCH)
The main layer in focus is layer 2. This second layer is the aquifer at the Taman Beringin landfill site where the impact of contamination direct from the leachate will be severe
Summary
Mismanagement, over depletion, climatechange, escalating population, national development projects, industrial and agriculture development are among the major problems linked to water quality issues around the globe. Large numbers of toxins are leached into these fresh water ways and are eventually submerge to the groundwater and inevitably to pumping well and our drinking water which are very harmful to human life, plant and animals or to the ecosystem in general (Gondwe, 2010). Both surface water and groundwater are two vital and interconnected water bodies that relates to each other both in terms of quality and quantity. Either surface or groundwater, the general goal is to make certain that adequate supplies of water of good quality are made available for all people, the ones living today and future generations, while preserving required quantity and quality of water flow to sustain crucial functions of ecosystems (Björklund, 2001)
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