SIMULATED TRANSPORT OF JET FUEL LEAKING INTO GROUND WATER, SINDH PAKISTAN

摘要: A three-dimensional model of the contaminant transport was developed to predict the fate of jet fuel, which leaked from the above surface storage tanks in the urban site of Karachi, Pakistan. Since the tanks were situated in a sandy layer, the dissolved product entered the ground water system and started spreading beyond the site. The modeling process comprised the steady-state simulation of the ground water system, the transient simulation of the ground water system in the period from January 1986 through December 2073, and the calibration of jet fuel that was performed in context of different parameters in the groundwater system. The fuel was simulated using a modular three-dimensional finite-difference groundwater model (PMWIN) ModFlow and a solute transport model (MT3D) in the 1986-2001 periods under a hypothetical scenario. After a realistic distribution of piezometric heads within the aquifer system, calibration was achieved and matched to known conditions; the solute transport component was therefore coupled to the flow. Jet fuel concentration contour maps show the expanding plume over a given time, which becomes almost prominent in the preceding years.