Providing DRASTIC maps to assess potential vulnerability in Kohnak aquifer using GIS

Journal of Water Science & Engineering

مقاله 3، دوره 2، شماره 5، آذر 2012، صفحه 33-44   

نوع مقاله: Original Article

نویسندگان

M Karimzadeh^{* 1}؛ A Abdeh Kolahchi²؛ F Farokhian³

¹Providing DRASTIC maps to assess potential vulnerability in Kohnak aquifer using GIS Msd environmental management

²Faculty on Soil conservation and watershed management Research institute.

³Faculty on Science and Research university of Khuzestan.

چکیده

Nowadays the study of regional groundwater resources, because of draught ,their optimal exploitation,
and reducing their pollution is a vital matter. A proper way to prevent the pollution of underground
waters is to locate vulnerable spots and to conduct an efficient exploitation of the ground. Using the
present models is very essential to locate and study about vulnerable spots. For this study, GIS and
DRASTIC methods were applied to study the pollution potential in Kohnak aquifer. DRASTIC model
is including seven layer : Depth of water, net Recharge , Aquifer media , Soil media, Topography ,
Impact of vadose zone and hydraulic Conductivity. these seven layers were prepared according to
well exploitation logs and other data pertaining to the soil and the rat of rainfalls by using GIS
software and the DRASTIC index (99.96-152.56) was calculated .Therefore the results show that the
research area in some parts have high vulnerability classes while the other parts were characteristized
by low vulnerability classes. Finally, it was proposed in areas with high vulnerability to possible
creation of a facility's potential to release pollutants to the aquifer such as refineries, industrial parks,
etc., must be avoided. As Well , the use of chemical fertilizers in this area should be limited to prevent
further damage to the aquifer .

کلیدواژه‌ها

Groundwater؛ GIS؛ DRASTIC method؛ Vulnerability؛ Kohnak aquifer

مراجع

صادقی روشن، م. و زهتابیان، غ.( 1390).ارزیابی آسیب پذیری آبخوان دشت خضرآباد به روش دراستیک مجموعه مقالات نخستین همایش ملی جهاد اقتصادی در عرصه کشاورزی و منابع طبیعی ، قم . ص.34-23.

حاجی کتابی،م و زارع،م .( 1389). تهیه نقشه خطر پذیری به روش دراستیک و تصحیح آن با اندازه گیری های میدانی و روش ویلکاکسیون، مجموعه مقالات دومین همایش ملی کشاورزی و توسعه پایدارtدانشگاه آزاد اسلامی شیراز .ص.12-18

نخعی،م ؛ بومری،م و رنجبر، ع . (1384). بررسی استعداد بالقوه آلودگی سفره آب زیرزمینی دشت شیراز با استفاده از GIS.مجموعه مقالات نهمین همایش  انجمن زمین شناسی ایران،دانشگاه تربیت معلم تهران .ص.23-45.

Aller,L.and Bennet,T.( 1987). A standardized system for evaluating groundwater pollution potential using hydrogeologic setting .US Environmental Protection Agency ,EPA- 600/2-87-035.

Dixon,B.(2004).Predication of groundwater vulnerability using an integrated GIS based NEURO    Fuzzy techniques .Journal of Spatial Hydrology ,4(2),34-56.

Fritch,TG., McKnight,CL., Yelderman, JC. and Arnald, FG .(2000). An aquifer vulnerability assessment of the paluxy aquifer ,central Texas ,USA, using GIS , and a modified DRASTIC approach. Environ Manage, 25:pp.337-345 .

Rundquist,DC.,Peters,AJ.,Di,Rodekohr.,Ehrman.,DA.andMurray,G.(1991).Statewide­groundwater –vulnerability assessment in Nebraska using thr DRASTIC /GIS Model. Geocarto Int 2:51-58 .