Assessment of water leakage through the right abutment of the Seymareh dam

Document Type : Research Paper


Department of Structural and Engineering Geology, School of Geology, College of Science, University of Tehran


One of the major issues in dam construction is water seepage, post impounding. Assessment and prediction of the amount of water
leakage can be useful in preventing such events. The Seymareh dam has been constructed on the Seymareh River in Ilam province,
Southwest of Iran. The dam controls the floods and generates hydroelectric power. It is already under impoundment and the seepage
problem is being considered. Grout curtains have been employed in two directions at the right abutment of the dam to control the
seepage. The normal reservoir level is 720 m and it has been impounded at the 660 m level up to the point. The purpose of this study is
to predict the amount of water seepage through the right abutment of the dam by using numerical modeling. For this purpose, a new
GW finite element code was used for a two-dimensional simulation of the water seepage. The Levels of the observations wells and the
discharges of the downstream springs on the right river bank are used as the main data for this modeling and its verification.
Assessments show that if the dam impoundment rises to the normal level, significant seepage may occur through the right abutment.


Article Title [Persian]

ارزیابی نشت آب از جناح راست سد سیمره

Authors [Persian]

  • اکبر چشمی
  • یعقوب صهبانیا
  • جواد اشجاری
دانشکده زمین شناسی، پردیس علوم، دانشگاه تهران، تهران، ایران
Abstract [Persian]

یکی از مباحث اصلی در ساخت سدها، تراوش آب بعد از آبگیری است. برای جلوگیری از وقوع نشت،ارزیابی و پیش‌بینی مقدار آن مفید است. سد سیمره روی رودخانة سیمره در استان ایلام در جنوب غرب ایران ساخته شده است. هدف از ساخت این سد کنترل سیلاب و تولید برق است. در زمان آبگیری سد به منظور کنترل نشت در جناح راست، پردة تزریق در دو جهت این جناح ساخته شده است. تراز نرمال آب دریاچه 720 متر است. در این زمان آبگیری در تراز 660 متر متوقف شده است. هدف این مقاله تخمین مقدار نشت از جناح راست سد با استفاده از روش‌های عددی است. بدین منظور از نرم‌افزار اجزای محدود GW استفاده شده است که مدلسازی نشت آب را به‌صورت دو بعدی انجام می‌دهد. تراز چاه‌های مشاهده شده و دبی چشمه‌های پایین‌دست در جناح راست رودخانه داده‌های اصلی برای مدلسازی و ارزیابی صحت مدل ارائه شده استفاده شد. نتایج ارزیابی‌ها نشان می‌دهد که اگر آبگیری به تراز نرمال سد برسد ممکن است نشت قابل توجهی در جناح راست سد اتفاق بیفتد.

Keywords [Persian]

  • سد سیمره
  • مدلسازی عددی
  • نرم‌افزار GW
  • نشت
Alavi, M., 2004. Regional stratigraphy of the Zagros fold-thrust belt of Iran and its profore land evaluation. Am. J. Sci.,
304:1- 20.
Ashjari, J., Raeisi, E., 2006. Anticlinal structure influences on regional flow, Zagross, Iran. Journal of cave and karst
studies, 68 (3): 118-129.
Ghobadi, M. H., Khanlari, G. R., Djalaly, H., 2005. Seepage problems in the right abutment of the Shahid Abbaspourdam,
southern Iran. Engineering Geology, 82: 119-126,
Karimi, H., Tavakkoli, M., 2007. Assessment of the appeared water origin in the water tunnel of power house of
Seymarehdam, Ilam. Journal of Engineering Geology, II (1).
Mahab Ghods Consulting Engineers, 2003. Engineering geology report on Seymarehdam. Tehran, Iran.
Malkawi, A.I.H., Al-sheriadeh, M., 2000. Evaluation and rehabilitation of dam seepage problems. A Case Study : Kafrein
Dam. Engineering Geology, 56: 335-345.
Assessment of water leakage through the right abutment of the Seymareh dam 223
Merritt, H., 1996. Geotechnical aspects of the design and construction of dams and pressure tunnels in soluble rocks. In
International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts, 33:.86A–86A.
Milanovic, P.T., 1981. Water resources pubs. Fort Collins, Karst hydrogeology.
Mohammadi, Z., Raeisi, E., Bakalowicz, M., 2006. Method of leakage study at the karst dam site. A case study: Khersan 3
Dam, Iran. Environmental Geology, 52 (6): 1053-1065.
Sadrekarimi, J., Kiyani, M., Fakhri B., Vahdatirad, M. J., Barari, A., 2011. Seepage analysis of upper Gotvanddam
concerning gypsum karstification (2D and 3D approaches). Frontiers of Architecture and Civil Engineering in China, 5
(1): 71- 78.
Stocklin, J., 1968. Structural history and tectonics map of Iran: a review. Is Assoc. Petrol. Geol. Bull, 52:1229- 1258.
Stocklin, J., Setudehnia, A., 1977. Stratigraphic lexicon of Iran.Geol. Survey of Iran, Tehran.
Turkmen, S. Özgüler, E.Taga, H. Karaogullarindan, T., 2002.Seepage problems in the karstic limestone foundation of the
Kalecikdam (south Turkey).Engineering geology, 63(3): 247-57.
Uromeihy. A. Barzegari, G., 2007. Evaluation and treatment of seepage problems at Chapar-Abad dam, Iran. Engineering
Geology, 91(2-4): 219- 228.
White, B.W., 1977. Role of solution kinetics in the development of karst aquifers. Karst Hydrogeology, Tolson, J.S.,
Doyle, F.L. (Eds.). Alabama, USA.
Volume 4, Issue 2 - Serial Number 2
summer & Autumn
October 2014
Pages 213-225
  • Receive Date: 17 March 2014
  • Revise Date: 13 January 2015
  • Accept Date: 07 December 2014
  • First Publish Date: 07 December 2014