Mining lakes are rarely used in Malaysia for raw water supply in water treatment despite their abundance.This is based on the general view that they are just mere retention ponds.However, there is growing acknowledgement that surface water features such as rivers and lakes can exchange water with underlying aquifers and this water movement can have significant implications on water quantity.This study examined the interaction between surface water (mining lake water) and groundwater (aquifer) using Lake L5 at the Universiti Teknologi PETRONAS, Perak, Malaysia, as a case study.Seepage meters and mini piezometers were used to evaluate the seepage flux rates, direction, and magnitude of water flow between the aquifer and the lake water.The seepage flux rates were found to be in the range of 3.45 Lm -2 day -1 to 11.08 Lm -2 day -1 and the Vertical Hydraulic Gradients (VHG) of the mini piezometers was within the range of 0.022 to 0.196.The results from these methods were positive, correlated and confirmed that groundwater was being discharge into the lake water; and that the farther the monitoring equipment from the shoreline, the lesser the groundwater discharge.Further research is required to be carried out for a longer period, under different hydrological conditions and time of the year, and at several locations.
Groundwater in fractured metasedimentary rock in Malaysia is a potential source of water for drinking and industrial
uses. Industries including agricultural processing, mineral water bottling, manufacturing and golf courses pumped
the water from the underlying fractured rocks. Fifty eight tubewells belong to private companies operating in various
places in West Coast of Peninsular Malaysia were evaluated for their yield and quality of water. Rotary percussion
methods were used for the drilling to a maximum depth of 200 m. The productivity of the wells and the characteristics
of the aquifer were evaluated by pumping test using both the constant discharge rate and steps drawdown methods. The
average yield of the wells at allowable drawdown of 40 m was found to be 416 m3 per day. Results from water quality
analysis indicated that the water was fresh with an average total dissolved solids (TDS) concentration of 101 to 150
mg/L. The hardness of the water varies from as low as 13 mg/L to a maximum of 353 mg/L. On the average, the water
was moderately hard with the average hardness value of 80 mg/L. The water facies of the groundwater was found to be
of calcium-sodium-bicarbonate water.
'/%3e%3cuse xlink:href='%23a' transform='translate(0 -400)'/%3e%3cuse xlink:href='%23a' transform='translate(0 -600)'/%3e%3cuse xlink:href='%23a' transform='translate(0 -800)'/%3e%3cuse xlink:href='%23a' transform='translate(0 -1000)'/%3e%3cuse xlink:href='%23a' transform='translate(0 -1200)'/%3e%3cpath d='M0 0h1400v800H0z' style='fill:%23010066'/%3e%3cpath d='M576 100c-166.146 0-301 134.406-301 300s134.854 300 301 300c60.027 0 115.955-17.564 162.927-47.783-27.353 9.44-56.71 14.602-87.271 14.602-147.327 0-266.897-119.172-266.897-266.01 0-146.837 119.57-266.01 266.897-266.01 32.558 0 63.746 5.815 92.602 16.468C696.217 118.91 638.305 100 576 100z' style='fill:%23fc0'/%3e%3cpath d='m914.286 471.429-99.538-53.25 29.43 108.982-66.575-91.165-20.77 110.96-20.428-111.024-66.857 90.96L699.314 418l-99.701 52.943 74.065-85.192-112.8 4.441 103.694-44.62-103.555-44.94L673.8 305.42 600 220l99.538 53.25-29.43-108.982 66.575 91.165 20.77-110.96 20.428 111.023 66.857-90.959L814.97 273.43l99.702-52.944-74.065 85.193 112.8-4.441-103.694 44.62 103.555 44.94-112.785-4.79z' style='fill:%23fc0' transform='matrix(1.2738 0 0 1.2423 -89.443 -29.478)'/%3e%3c/svg%3e)
