Ehteshami, M., Sharifi, A. (2009). Finite Difference Modeling of Rey Province Ground Water. , 22(2), 257-270. doi: 10.22092/ijsr.2009.127009
M. Ehteshami; A. Sharifi. "Finite Difference Modeling of Rey Province Ground Water". , 22, 2, 2009, 257-270. doi: 10.22092/ijsr.2009.127009
Ehteshami, M., Sharifi, A. (2009). 'Finite Difference Modeling of Rey Province Ground Water', , 22(2), pp. 257-270. doi: 10.22092/ijsr.2009.127009
Ehteshami, M., Sharifi, A. Finite Difference Modeling of Rey Province Ground Water. , 2009; 22(2): 257-270. doi: 10.22092/ijsr.2009.127009

Finite Difference Modeling of Rey Province Ground Water

پژوهش های خاک
Volume 22, Issue 2, February 2009, Pages 257-270    PDF (733.22 K)
Document Type: Research Paper
DOI: 10.22092/ijsr.2009.127009
Authors
M. Ehteshami* 1; A. Sharifi2
1Assistant Professor, Khaje Nasir Toosi University of Technolgy
2Researcher, Research Institute of Petroleum Industry
Abstract
Drinking water demand is presently putting pressure on the City of Rey authorities. With a population of about one million in central Iran, the city relies on groundwater sources to tackle its growing need for the potable water. The quality of the groundwater, which currently contributes up to 50% to the total drinking water demand, has become a major concern. In this research, groundwater contamination in the Rey province and its social health impacts has been investigated. In particular, the problem of groundwater contamination caused by nitrates and bacteria due to anthropogenic activities in the area has been addressed. The study has been encountered with several difficulties such as shortage in proper field data and measurements, the vast study area as well as the complexity of nitrate fate. The main focus has been to identify the contaminant sources in the area, classify the saturated zones, learn about nitrate transport mechanisms and estimate the quantities finally discharged into the groundwater. The employed mathematical groundwater model shows that during a representative simulated 7 years dry period (from 1382 to 1388) the mean groundwater level will drop about 9.5 meters. In the eastern regions the water surface will move from -1.5 to -5 meter, while in the central regions the water surface will fall from -5 to -11 meters. In some areas in the western regions the water surface will even drop more than 22 meter. Groundwater quality model shows that the Rey aquifer consists of several overlying layers. It has been perceived that during the representative dry period, the nitrate concentration will increase in the central and eastern regions. Bearings of an under construction sewage collection network and treatment, however, has not been included in the current study. The new sewage system seems to have some impacts on the nitrate concentration in the Rey province and will put the actual figures lower than that that reported by the current study. The employed mathematical groundwater model (PMWIN) is competent to predict the groundwater potentials for periods of about 10 years. With conventional quality groundwater models, it is only possible to provide predictions up to 2 to 3 years. Which is why the errors of quality groundwater model would be increasingly, mount after 3 years.
Keywords
Modeling; Rey; Nitrate; Contaminant; Ground Water; MT3D; PMWIN-5.3
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