Numerical modeling of dewatering system to construct pump basins in open sea water intake system by MODFLOW

Document Type : Research Paper


1 Golestan Universirty

2 Khalije Fars University


Pump basins are important structures in open sea water intakes. Dewatering construction site of these structures with no leakage inside the site is an essential issue. Throughout this paper, two common aspects of dewatering systems, namely big wells and well points are evaluated to make the construction site of the pump basin ready at the intake system of Bushehr desalination installations. To achieve this, MODFLOW software was employed to model the dewatering systems with results demonstrating the performance of the considered dewatering methods. According to the observed results, to have an efficient dewatering system, a number of about 26 wells as high capacity ones (well discharges ranging from 0.5 to 5.5 lit/s)are needed vs. 119 well points (well discharges ranging from 0.1 to 1.1 lit/s). In addition, sensitivity analysis of the system, as regards the variation of soil conductivity (in both space and time) proves that the well point system is more efficient than the high capacity well system, for dewatering an uncertain site. 


Main Subjects

Barani, S., Shafiei, S., Malekinezhad, H. and Nezhadkoraki F. (2010). Modeling of ground water in Morost aquifer via MODFLOW and Pest, 1th international conference on plant, water, soil and weather modeling. (In Farsi)
Chitsazan, M. and Kashkoli H.A. )2002(. Groundwater modeling and problems, Shahid Chamran University publishing, Ahwaz (In Farsi)
Derakhshandehro, G., Vaghefi, M. and Saeidi G.R. (2009). Determination of groundwater storage and velocity head via the MODFLOW (Case study: Bashar River watershed), 10th national irrigation and evaporation conference. (In Farsi)
Derakhshandehro and Barani G.A., (2015). Evaluation of Artificial inchagre on Gachsaran Emamzadeh Jafar aquifer by Mathematical model and MODFLOW. International Conference of Science and Technology (In Farsi).
Fethi L., Ammar M., Mourad B., Jamila T., Christian L. (2012). Implementation of a 3-D groundwater flow model in a semi-arid region using MODFLOW and GIS tools: The Zéramdine–Béni Hassen Miocene aquifer system (east-central Tunisia). Computers & Geosciences, Volume 48, November, Pages 187-198
Hossiensarbazi A. and Esmaeili K. (2012). Modeling of groundwater (Case study: Nishabor Aquifer). Journal of Science and Irigation, P.P. 66, No. 4. (In Farsi).
Janparvar M. and Alavimoghadam M.R. (2015). Estimating water discharge decreasing of Ghazvin Aquifer to have an equilibrium condition. First National Conference on Agriculture, Ardebil (In Farsi).
Kalantari, N.(1998). Groundwater Hydrogeology, 3th publishing, Shahid Chamran University publishing, Ahwaz (In Farsi).
Mashhadi, L. and Baghvand A. (2010). Evaluation and modeling of burial waste load contamination effects over groundwater resources (Case study: Amanabad Aquifer) . 4th conference and exhibition of environmental engineering.
Norvijeh, Geotechnical Report for Bushehr Desalination factory, (2015), Geotechnical Lab for Iran transportation ministry.
McDonald, J. M., & Harbaugh, A. W. (1988). MODFLOW, a modular 3D finite difference ground-water flow model. US Geological Survey, Open File Report, 83-875
Mohamadkhani M. and Katibeh H. )2004(. Modeling of groundwater in Sechahoon mine by MODFLOW, Mineral Engineering Conference (In Farsi).
Nemati, K. M. (2007), Temporary Structures, Construction Dewatering and Ground Freezing, UNIVERSITY OF WASHINGTON, DEPARTMENT OF CONSTRUCTION MANAGEMENT
Saghravani S. R. and Mustaph S. (2011). A Prediction of Contamination Migration in an Unconfined Aquifer. with Visual MODFLOW: A Case Study, World Applied Sciences Journal 14 (7): 1102-1106, 2011.
THCDWAI (Temporary High Capacity Dewatering Well Application Instructions) (2012). Department of Natural Resources, State of Wisconsin.
Todd W. R. and R. B. Kenneth. (2001). Report: Delineation of capture zones for municipal wells in fractured dolomite, Sturgeon Bay, Wisconsin, USA. Hydrogeology Journal, 9:432–450. M.
Torshizi, S., Haghighatjoo, P., R., Sheibanian, A., R.  and Roeintan, S. (2015). Modeling of Sarvestan aqueifer groundware via MODFLOW package. Water engineering conference and exhibition (In Farsi).
Thorley, M. and P. Callander. (2005). Christchurch city groundwater model. Environment Canterbury Report, Vol. 05/53,
Zeighaminezhad, M., Ghazanfarimoghadam, M.S. and Barani. G.A. (2015). Determintion of freshwater well restriction by MODFLOW model. 2 th Conference of Agriculture, Natural resources and environment of Iran. (In Farsi)