A Comparison of Delineation Methods for Wellhead Protection Area Case Study: Drinking Wells of Hamedan City

Document Type : Original Article

Authors

1 M.Sc in Hydrogeology, Tehran Regional Water Company, Tehran, Iran

2 Research Instructor, Research Institute of Applied Science, Shahid Beheshti University,Tehran,Iran

3 Research Instructor, Research Institute of Applied Science, Shahid Beheshti University,Tehran,Iran.

Abstract

Well Head Protection (WHP) area, is a surface or subsurface area around a well which supplies extracted water from a well and therefore the pollutants entering the groundwater in this area would finally pump out from the well.  In this study while introducing calculated fixed radious (CFR) method for determining WHP area of a single well, other conventional methods like analytical methods (Wyssling and KLF) and numerical models are also compared using nine pumping wells suppling drinking water for Hamedan city, Iran. The results indicated that by increasing the time of travel (increasing distance from a well), calculated fixed radious and analytical methods would lose their accuracy compared to the numerical modeling. CFR calculated values indicated under-protection on the upgradient side and over-protection on the downgradient side of a well head protection area. Moreover, in spite of the fact that the protection areas which calculated by KLF and Wyssling analytical methods, compared to the fixed radius method, are covering further area compared to the calculated protection area by numerical models, the narrow extended shape showed that the results does not cover considerable lateral distances of calculated protection area. Generally, the numerical models are the most accurate methods to draw well head protection area. In case of insufficient data, time, fund, and knowledge, however applying simpler methods like calculated fixed radius method and analytical methods would also lead to acceptable results.
 
 

Keywords

References

بدو ک (1383) مبانی محاسبات حریم بهداشتی برای حفاظت کیفی چاه‌های آب شرب در شهرها. استقلال‌، سال 23، شماره 2: 77-91.
دلخواهی ب ‌، اسدیان ف (1390) مروری بر عوامل موثر بر حریم حفاظتی چاه‌های شرب با استفاده از مدل ریاضی عددی، مطالعه موردی: منطقه یافت آباد تهران. تحقیقات منابع آب ایران‌، سال 7، شماره 3: 89-94.
دلخواهی ب، خدایی ک و اسدیان ف (1387) تعیین حریم حفاظتی چاه‌های شرب شهر همدان با استفاده از مدل عددی و GIS.  انتشارات شرکت آب و فاضلاب استان همدان، همدان، 171 صفحه.
Bates JK , Evans JE (1996) Evaluation of wellhead protection area delineation methods, applied to the municipal well field at Elmore. Ottawa County, Ohio. Ohio Journal of Science 96(1): 13-22.             
Bingham M (2010) Vulnerability Assessment and Scoring of Wellhead Protection Areas City of Hamilton. Earthfx Incorporated‌, Ontario‌, 53.
Frind EO and Mohammad DS (2002) Delineation of three-dimensional well capture zone for complex multi-aquifer systems. Ground Water Journal 40(6): 586-598. 
Golder Associates Ltd (2001) Phase II Groundwater Protection Study, County of Oxford, Golder Press, Ontario, Canada, Technical Report.
Harter T (2002) Delineating Groundwater Sources and Protection Zones, California Department of Health Services, California, 220.
McDonald MG and Harbaugh AW (1987) A modular three dimensional finite difference groundwater flow model. Techniques of water resources investigations , 06-A1 , USGS‌, 576.
Miller CH W (2003) A comparison of wellhead protection area delineation methods for public drinking water systems in Whatcom county, Washington. Journal of Environmental Health 66(2): 17-23.
Mogheir Y and Tarazi G (2010) Comparative identification of wellhead protection area for municipal supply wells in Gaza.  Journal of Water Resource and Protection 2(2):105-114.
Moinante MJ and Lobo-ferreira JP (2005) On wellhead protection assessment methods and a case-study application in Montemor-o-Novo,Portugal‌. In: The Fourth Inter-celtic Colloquium on Hydrology and Management of Water Resources, 11-13 July, Universidade do Minho, Guimaraes, Portugual, 21-34.
Pollock DW (1989) Ducumentation of computer programs to complete and display pathlines using results from the U.S. Geological survey modular three dimensional finite difference groundwater model, USGSopen file report‌, 81.
Puchalski G (2009) Wellhead Protection Plan for the City of Barrett. J Minnesota Deppartment of Health 24(3): 2-16.
Shuguang L and Huasheng L (2012) Wellhead protection area delineation using available data, MSU College of  Engineering, Michigan DEQ, USA‌, 67.
Springer AE and Bair ES (1992) Comparison of methods used to delineate capture zones of wells: Stratified-Drift Buried-Valley Aquifer. Ground Water Journal 30(6): 908-917.
Stroble RO and Robillard PD (2006) Comparison of several EPA-recommended US and German wellhead protection area delineation methods in agricultural settings. J Water SA 32(4): 507-517.
Theodossiou N and Latinopoulos D (2009) Economic aspects of the delineation of well head protection areas under conditions of uncertainty . In:Proceedings of the second International CEMEPE & SECOTOX  Conference (CEMEPE & SECOTOX-2009), 10-11 October, Mykonos, Greek: 309-314.
U.S. Enviromental Protection Agency (1987) Guidance for Delineation of Wellhead Protection Areas, U.S. EPA, Office of Groundwater Protection, Washington, D.C‌, 354.
Iran-Water Resources Research
Volume 9, Issue 2
October 2013
Pages 27-41

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History

  • Receive Date: 29 April 2012
  • Accept Date: 11 May 2013

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