Simulation Of Nitrate Transport Contamination (Case Study: Shemiranat Plain, Tehran, Iran)

In recent year, the quality of domestic groundwater drastically reduced mainly due to the industrial and agricultural activities and municipal wastewater that leaks into aquifers. Nitrate is one of the most important sources of groundwater contamination in urban area such as Shemiranat Plain which located in North of Tehran, Iran. The aims of this study are to simulate the groundwater flow and nitrate transport and map the variability and trend of nitrate contamination in the Shemiranat aquifer as well. Aquifer parameters, groundwater level, hydraulic conductivity, specific yield and recharge values used for flow simulation and nitrate characteristics such as diffusion coefficient, longitudinal dispersivity and distribution coefficient used for transport simulation respectively. Then the model successfully calibrated (2010-2011) and validated monthly form September 2011 to August 2012. The results show that the high value of Nitrate concentration and trend of Nitrate transport is occurred from South to South-East of Shemiranat plain.