برسی منابع آب در سازندهای کارستی تاقدیس کبیرکوه
|گروه||سازمان زمین شناسی و اکتشافات معدنی کشور|
|مکان برگزاری||بیستمین گردهمائی علوم زمین|
|تاريخ برگزاری||۱۸ بهمن ۱۳۸۰|
The Kabirkuh is a double plunge anticline which located in Ilame province.Length of this mountion is ۱۶۰ kilometers and belong to the Zagros folded zone.
The exposed geological formations in descending order of age are Garau,Sarvak,Surgah,Ilam,Gurpi,
Pabdeh,Asmari and Gachsaran.
Because of the high rate of precipitation and presence of joints and fracture in carbonate and gypseous formations karstification phenomena has been developted at this anticline. Hence karstic features such as doline, karren, canyon, cave and jama have been formed.
Sarvak and Ilam formations have formed a permeable hydrogeologic unit which is underlaid and overlaid by impermeable shales of Garau and Gurpi formations,respectively. Several big karstic springs originate from this hydrogeologic unit which are overflow springs type at classification according to geologic and tectonic conditions.
These springs contain Darreh shahr ,Sikan,Kuchak and Kolm at north flank and Siah gav,Abdanan,
Maymeh ۱ ,Maymeh ۲ and Gurab-e maymeh at south flank of the Kabirkuh anticline which provide main part of potable and agricultural water of Ilam province. The aquifer dynamic volume in period ۱۳۷۱-۷۲ have been calculated ۳۲۹.۷۸ M.C.M by using of
recession curve analysis of springs.