Investigation of Transportation of Pollutants in Alluvial Bed of One of Zanjan River Branches Using MODPATH

Document Type : Original Article

Authors

1 Post Graduate Student of Hydraulic Structures, Department of Civil Engineering, University of Zanjan, Zanjan, Iran.

2 Assistant Professor, Department of Civil Engineering, University of Zanjan, Zanjan, Iran.

Abstract

Groundwater resources,as one of the most important resources of water supply, have been faced with the qualitative decline and increasing the concentration of pollutants in addition to a quantitive problems in recent years. According to the importance of the role of water supply quality in exploitation, recognizing the aquifer and factors affecting it is very important. This study was conducted to investigate the movement of pollutants with the view of assessing aquifer vulnerability in one of the branches of Zanjan River. Accordingly, two types of intrinsic and special vulnerability in the region were investigated by two methods of drastic and HPI. The results of vulnerability index show that the soil of region is effective in decreasing the concentration of heavy metals under study (lead, chromium, nickel, cobalt, zinc) and the concentration reduces in the direction of groundwater flow. The results of vulnerability index showed that the Drastic index is more than 80% in the medium to low and low ranking and the HPI index of the basin with an average of 30.3 is in the low risk, however, this basin has the potential to develop pollution. In order to determine the direction of pollution and the role of alluvial in the area MODPATH numerical model was used to simulate under the influence of the advection process in order to determine the direction of pollutants movement and the role of alluvium of the region. The numerical simulation of the region was carried out for three years after modeling and calibrating the MODFLOW model. Based on the results, the wells located along the groundwater and surface water flow path in the center of the basin have longer length compared to the wells that are around and far from the center of the basin. Based on the results, different patterns can be used such as creating barriers to modify and reduce the amount of pollutants transfer in this basin and other basins leading to Zanjan River.

Keywords

References

شرکت مدیریت منابع آب ایران، مطالعات بهنگام سازی بیلان منابع آب حوزه آبریز سفیدرود بزرگ مختوم به سال آبی 90-89، جلد پنجم ارزیابی منابع آب، ضمیمیه شماره4: بیلان منابع آب محدوده مطالعاتی زنجان(کد 1304)
Aller L. Bennet T. Lehr J.H. Petty R.J. Hackett G. 1987. DRASTIC: A Standardized System for Evaluating Ground Water Pollution Potential using Hydrogeologic Settings. U.S.Environmental Protection Agency. Ada. Oklahom.
Almasri. M. N. and Kaluarachchi. J. J.2007 Modeling nitrate contamination of groundwater in agricultural watersheds. Journal of Hydrology. 343(1-2): 211–229.
Balakrishnan, A. and Ramu, A.. 2016. Evaluation of heavy metal pollution index (HPI) of ground water in and around the coastal area of Gulf of Mannar Biosphere and Palk Strait. Journal of Advanced Chemical Sciences. 331-333.
Breabăn, I. G.. & Paiu, M.. 2012. Application of DRASTIC model and GIS for evaluation of aquifer vulnerability: study case Barlad city area. Water resources and wetlands. P:14-16.
Fioreze. M. and Mancuso. M.A..2019. MODFLOW and MODPATH for hydrodynamic simulation of porous media in horizontal subsurface flow constructed wetlands: A tool for design criteria. Ecological Engineering. 130:45-52.
Ghaderpoori. M..2018. Heavy metals analysis and quality assessment in drinking water–Khorramabad city.Iran. Data in brief. 16:685.
Kardan Moghaddam. H.. Jafari. F. and Javadi. S..2017. Vulnerability evaluation of a coastal aquifer via GALDIT model and comparison with DRASTIC index using quality parameters. Hydrological Sciences Journal. 62(1):137-146.
 Kardan Moghaddam. H.. Banihabib. M.E. and Javadi. S.. 2018. Quantitative sustainability analysis of aquifer system (case study: South Khorasan-Birjand aquifer). Journal of Water and Soil. 31(6).
Klaas. D.K.S.Y.. Imteaz. M.A. Arulrajah. A. Sudiayem. I. Klaas. E.M.E. and Klaas. E.C.M.. 2018. Mapping Groundwater Vulnerability Zones in Eogenetic Karst Catchment Using Particle-tracking Method. In IOP Conference Series: Earth and Environmental Science (Vol. 159. No. 1: 012011). IOP Publishing.
Nasrabadi, T.. 2015. An IndexApproach toMetallic Pollution in RiverWaters. International Journal of Environmental Research. 9(1): 385-394.
Tiwari. A.K. De Maio. M.. Singh. P.K. and Mahato. M.K.. 2015. Evaluation of surface water quality by using GIS and a heavy metal pollution index (HPI) model in a coal mining area, India. Bulletin of environmental contamination and toxicology. 95(3):304-310.
Vrba, I., and Zaporozec, A..1994.  Guidebook on Mapping Groundwater Vulnerability. International Contributions to Hydrogeology, Vol. 16: 131.
 
Yang, Q., Lun, W., & Fang, Y. (2011). Numerical modeling of three dimension groundwater flow in Tongliao (China). Procedia Engineering, 24, 638-642.
Zghibi. A.. Merzougui. A.. Chenini. I.. Ergaieg. K.. Zouhri. L. and Tarhouni. J.. 2016. Groundwater vulnerability analysis of Tunisian coastal aquifer: An application of DRASTIC index method in GIS environment. Groundwater for Sustainable Development. 2:169-181.
Iranian Journal of Irrigation & Drainage
Volume 14, Issue 3 - Serial Number 81
July and August 2020
Pages 829-840

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