Application of GIS in the Study of Groundwater Pollution in Urban Areas (Case Study: Mashhad city)

Document Type : Technical Note (5 pages)

Authors

1 MSc. Graduate in Hydrology, Shahrood University of Technology, Semnan, Iran

2 Assistant Professor, Faculty of Earth Sciences, Shahrood University of Technology, Semnan, Iran.

3 Assistant Professor, Faculty of Earth Sciences, Shahrood University of Technology, Semnan, Iran

4 MSc. Student in Petrology, Islamic Azad University of Zarand, Kerman, Iran.

Abstract

This study has dealt with the groundwater pollution using Arc GIS 9.3 and has identified the areas with high, moderate, and low pollution risk by the help of modeling and some parameters of the DRASTIC method taking into account the population growth rate in the urban areas. Although DRASTIC is often applied to the large alluvial plains, the contamination rate of the aqufer can be assessed in the urban area with a semi-drastic model if some of DRASTIC parameters are modified and also other effective factors are taken into account. In this study the parameters of depth to water, net recharge, aquifer media, soil media, topography, impact of Vadose zone, and hydraulic conductivity were evaluated to assess the risk of groundwater contamination. The site specific conditions pertaining to the urban areas were also considered; the impact of the texture of surface soil on the contamination of aquifer in the urban areas has been highlighted. Considering the role of urban sewer in aquifer contamination the parameter of population density has also been determined as a vital parameter and has been added to the DRASTIC parameters. In general the findings showed that the most vulnerable areas in Mashhad city include central, southern, and southeastern parts of the city.
 

Keywords

References

الوندی، ز. (1389)، ”بحران کمبود آب مشهد، دنیای اقتصاد“، سال هشتم، شماره 2248، ص 23.
جعفری قریه علی، ع. (1386)، ”تأثیر شهرسازی بر روی کمیت و کیفیت آب زیر­زمینی شهر مشهد“، پایان نامه کارشناسی ارشد دانشگاه صنعتی شاهرود، 118 صفحه.
چیت­سازان، م.، اختری، ی.، (1385)، ”پتانسیل­یابی آلودگی آبهای زیرزمینی در دشتهای زویرچری و خران با استفاده از مدل دراستیک و سیستم جغرافیایی“، مجله آب و فاضلاب، شماره 59، ص 51-39.
حافظی­مقدس، ن. (1385), ”گزارش زمین­شناسی مهندسی پروژه ریز پهنه­بندی لرزه­ای شهر مشهد“، سازمان مسکن و شهر­سازی خراسان رضوی.
خلقی، م.، تاکی، ر. (1382)، ”ارزیابی آسیب­پذیری دشت قزوین“، مجله زمین­شناسی مهندسی، جلد اول، شماره 3، ص 270-255.
Aller, L. T., Bennett, H. J. R., Lehr, R., Petty, J. and Hackett, G., (1987), “DRASTIC: A standard system for evaluating ground water pollution potential using geo-hydro geologic setting”, US Environmental Protection Agency Report, USEPA 600/2-87-035,pp 622.
Babiker, I. S., Mohamed, M. A. A., Hiyama, T., and Kato, K., (2005), “A GIS-based DRASTIC model for Assessing aquifer vulnerability in Kakamigahara Heights, Gifu Prefecture, Central Japan”, Since of the Total Environment, 345,pp 127-140.
Melloul, A,. and Collin,M,.)1994(,“Water quality factor identification by the principal components statistical method,” Water Sci. Technol, 34, pp 41-50.
Piscopo, G., (2001), “Groundwater vulnerability map explanatory notes, Castlereagh Catchment, NSW. “Department of Land and Water Conservation, Australia”.
Tesoriero, A. J., Inkpen, E. L., and Voss, F. D. (1998), “Assessing ground-water vulnerability using logistic regression,” proc., Source Water Assessment and Protection 98 Conference, Dallas, TX, pp. 157-165.
 
 
 
 
 
 
 
 
 
 

Files

History

  • Receive Date: 23 January 2012
  • Accept Date: 27 August 2012

Share

How to cite

Statistics