Simulation of Nitrate Concentration in Aquifer in Qazvin Plain Using Groundwater Modeling System (GMS)
Background Nitrate is among major anions in drinking water. Therefore, it is crucial to investigate its concentration in water resources. Modeling is a management strategy to predict the behavior of nitrate in water resources. Objective The current study aimed to predict nitrate concentration in...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | fas |
| Published: |
Qazvin University of Medical Sciences & Health Services
2019-08-01
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| Series: | The Journal of Qazvin University of Medical Sciences |
| Subjects: | |
| Online Access: | http://journal.qums.ac.ir/article-1-2757-en.html |
| Summary: | Background Nitrate is among major anions in drinking water. Therefore, it is crucial to investigate its
concentration in water resources. Modeling is a management strategy to predict the behavior of nitrate
in water resources.
Objective The current study aimed to predict nitrate concentration in the aquifer of Qazvin plain, using
Groundwater Modeling System (GMS).
Methods The GMS7.1 software was used to prepare the groundwater flow model. MODFLOW pattern
was used to investigate the three-dimensional flow. MT3D pattern was used to assess the changes nitrate
concentration in the aquifer. Additionally, several scenarios were designed to evaluate the process
of nitrate changes in the aquifer by altering in the aquifer feed and nitrate input rates.
Findings There was no anomaly concentration in the aquifer. The scenarios of rainfall reduction suggested
that nitrate feed was ineffective in changing nitrate concentration in the aquifer. Moreover, with
entry 100, 200, and 300 mg/L of nitrate into the aquifer, the average of nitrate concentration after the
end of the two-year periods would increase to 31, 55, and 100mg/L, respectively.
Conclusion The obtained results indicated that in a wide area of the saturated aquifer nitrate concentration
was below than national standards. Furthermore, high nitrate concentrations were due to the penetrating
of the sewage into the aquifer. The outputs of the GMS model suggestd that these conditions
could lead to more contamination in central parts of the aquifer. |
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| ISSN: | 1561-3666 2228-7213 |