Assessment of Ilam Reservoir Eutrophication Response in Controlling Water Inflow

Document Type: Research Papers


1 MSc. Department of civil Engineering, Razi University, Kermanshah, Iran,

2 Assistant Professor, Department of civil Engineering, Razi University – Water and Wastewater Research Center, Razi University, Kermanshah, Iran

3 Director of Water Resource Institute (WRI), Tehran, Iran

4 Assistant Professor, Faculty of agriculture and natural resources water engineering department, Razi University, Kermanshah, Iran


In this research, a 2D laterally averaged model of hydrodynamics and water quality, CE-QUAL-W2, was applied to simulate water quality parameters in the Ilam reservoir. The water quality of Ilam reservoir was obtained between mesotrophic and eutrophic based on the measured data including chlorophyll a, total phosphorus and subsurface oxygen saturation. The CE-QUAL-W2 model was calibrated and verified by using the data of the year 2009 and 2010, respectively. Nutrients, chlorophyll a and dissolved oxygen were the water quality constituents simulated by the CE-QUAL-W2 model. The comparison of the simulated water surface elevation with the measurement records indicated that the flow was fully balanced in the numerical model. There was a good agreement between the simulated and measured results of the hydrodynamics and water quality constituents in the calibration and verification periods. Some scenarios have been made base on decreasing in water quantity and nutrient inputs of reservoir inflows. The results have shown that the water quality improvements of the Ilam reservoir will not be achieved by reducing a portion of the reservoir inflow. The retention time of water in reservoir would be changed by decreasing of inflows and it made of the negative effects on the chlorophyll-a concentration by reduction of nutrient inputs and keeping constant of discharge inflow to reservoir, the concentration of total phosphorus would be significantly changed and also the concentration of chlorophyll-a was constant approximately. Thus, the effects of control in nutrient inputs are much more than control in discharge inflows in the Ilam reservoir.


Main Subjects

Afshar, A. and Saadatpour, M. (2009).  "Reservoir eutrophication modeling, sensitivity analysis, and assessment: Application to Karkheh Reservoir, Iran", Journal of Environmental Engineering Science, 26(7), 1227-1238.

Amarala, S.D.,  Britob, D.,  Ferreiraa, M.T.,  Nevesb, R. and  Francoc, A. (2013). "Modeling water quality in reservoirs used for angling competition: Can groundbait contribute to eutrophication?", Journal of Lake and Reservoir Management, 29(4), 257-269.

Chen, W.B., Liu, W.C. and Hung, L.T. (2012). "Measurement of sediment oxygen demand for modeling the dissolved oxygen distribution in a subalpine lake", International Journal of Physical Sciences, 7(27), 5036-5048.

Chung, S.W. and Lee, H.S. (2009). "Characterization and modeling of turbidity density plume induced into stratified reservoir by flood runoffs", Journal of Water Science and Technology, 59(1), 47-55.

Chung, S.W. and Oh, J.K. (2006). "Calibration of CE-QUAL-W2 for a monomictic reservoir in a monsoon climate area", Journal of Water Science and Technology, 54 (11-12), 29-37.

Cole, T.M. and Wells, S.A. (2008). "CE-QUAL-W2: A two-dimensional, laterally averaged, hydrodynamic and water quality model, version 3.6", Department of Civil and Environmental Engineering, Portland State University, Portland.

Dai, L., Dai, H. and Jiang, D. (2012). "Temporal and spatial variation of thermal structure in Three Gorges reservoir: A simulation approach", Journal of Food, Agriculture and Environment, 10(2), 1174-1178.

Debele, B., Srinivasan, R. and Parlange, J.Y. (2008). "Coupling upland watershed and downstream waterbody hydrodynamic and water quality models (SWAT and CE-QUAL-W2) for better water resources management in complex river basins", Journal of Environmental Modeling and Assessment, 13(1), 135-153.

Deus, R., Brito, D., Mateus, M., Kenow, I., Fornaro, A., Neves, R. and Alves, C.N. (2013). "Impact evaluation of a pisciculture in the Tucuruí reservoir (Pará, Brazil) using a two-dimensional water quality model", Journal of Hydrology, 487, 1-12.

Diogo, P.A., Fonseca, M., Coelho, P.S., Mateus, N.S., Almeida, M.C. and Rodrigues, A.C. (2008). "Reservoir phosphorus sources evaluation and water quality modeling in a transboundary watershed", Journal of Desalination, 226(1), 200-214.

Dodds, W.K. (1992). "Nutrient removal bioassay methods for assessment of the effects of decreased nutrient loading on phytoplankton communities in aquatic ecosystems", The Soap and Detergent Association.   

Dzialowski, A.R., Lim, N.C., Liechti, P. and Beury, J. (2007). "Internal nutrient recycling in Marion reservoir", Kansas Biological Survey Report No. 145.

Etemad-Shahidi, A., Afshar, A., Alikia, H. and Moshfeghi, H. (2009). "Total dissolved solid modeling; Karkheh reservoir case example", International Journal of Environmental Research, 3(4), 671-680.

Fang, X., Shrestha, R., Groeger, A., Lin, C.J. and Jao, M. (2007). "Simulation of impact of streamflow and climate conditions on Amistad reservoir", Journal of Contemporary Water Research and Education, 137(1), 4-20.

Garrell, M.H., Confer, J.C., Kirschner, D. and Fast, A.W. (1977). "Effects of hypolimnetic aeration on nitrogen and phosphorus in a eutrophic lake", Journal of Water Resources Research, 13(2), 343-347.

Gelda, R.K., Owens, E.M. and Effler, S.W. (1998). "Calibration, verification, and an application of a two-dimensional hydrothermal model [CE-QUAL-W2(t)] for Cannonsville reservoir", Journal of Lake and Reservoir Management, 14(2-3),186-196.

Ha, S.R. and Lee, J.Y. (2008). "Application of CE-QUAL-W2 model to eutrophication simulation in Daecheong reservoir stratified by turbidity storms", Proceedings of 12th World Lake Conference, Jaipur, India.

Irianto, E.W., Triweko, R.W. and Soedjono, P. (2012). "Simulation analysis to utilize hypolimnetic withdrawal technique for eutrophication control in tropical reservoir (Case study: Jatiluhur reservoir, Indonesia)", International Journal of Environment and Resource, 1(2), 89-100.

Karamuz, M. and Karachian, R. (2011). Water resources systems quality management and programming, Amirkabir University of Technology Publications (Tehran Polytechnics), Tehran, Iran.

Kim, Y. H. and Kim, B. C. (2006). "Application of a 2 simensional water quality model (CE-QUAL-W2) to the turbidity interflow in a deep reservoir (Lake Soyang, Korea)", Journal of Lake and Reservoir Management, 22(3), 213-222.

Kuo, J.T.,  Hsieh, M.H.,  Liu, W.C.,  Lung, W.S. and  Chen, H.C. (2006). "Linking watershed and receiving water models for eutrophication analysis of Tseng-Wen reservoir, Taiwan", International Journal of River Basin Management, 4(1), 39-47. 

Kuo, J.T., Lung, W.S., Yang, C.P., Liu, W.C., Yang, M.D. and Tang, T.S. (2006). "Eutrophication modelling of reservoirs in Taiwan”, Journal of Environmental Modelling and Software, 21(6), 829-844.

Lee, J.Y., Ha, S.R., Park, I.H., Lee, S.C. and Cho, J.H. (2010). "Characteristics of DOC concentration with storm density flows in a stratified dam reservoir", Journal of Water Science and Technology, 62(11), 2467-2476.

Liu, W.C. and Chen, W.B. (2013). "Modeling hydrothermal, suspended solids transport and residence time in a deep reservoir", International Journal of Environmental Science and Technology, 10(2), 251-260.

Liu, W.C., Chen, W.B. and Kimura, N. (2009). "Impact of phosphorus load reduction on water quality in a stratified reservoir-eutrophication modeling study", Journal of Environmental Monitoring and Assessment, 159(1-4), 393-406.

Ma, S., Kassinos, S.C., Kassinos, D.F. and Akylas, E. (2008). "Effects of selective water withdrawal schemes on thermal stratification in Kouris dam in Cyprus", Journal of Lakes and Reservoirs: Research and Management, 13(1), 51-61.

Mahab Qods Consultant Engineering Company. (2010). "Long-term drinking water studies report in the Ilam city", Technical Report, Tehran, Iran.

Messer, J.J., Ihnat, J.M., Mok, B. and Wegner, D. (1983). "Reconnaissance of sediment-phosphorus relationships in Upper Flaming Gorge reservoir", Report Paper 215,   

Nielsen, E. J. (2005). "Algal succession and nutrient dynamics in Elephant Butte reservoir", M.Sc. Thesis, Brigham Young University, UK.

Park, Y., Cho, K.H., Kang, J.H., Lee, S.W. and Kim, J.H. (2014). "Developing a flow control strategy to reduce nutrient load in a reclaimed multi-reservoir system using a 2D hydrodynamic and water quality model", Science of the Total Environment Journal, 466, 871-880.

Wu, R.S., Liu, W.C. and Hsieh, W.H. (2004). "Eutrophication modeling in Shihmen reservoir; Taiwan", Journal of Environmental Science and Health, Part A, 39(6), 1455-1477.

Yu, S.J., Lee, J.Y. and Ha, S.R. (2010). "Effect of a seasonal diffuse pollution migration on natural organic matter behavior in a stratified dam reservoir", Journal of Environmental Science, 22(6), 908-914.

Zouabi-Aloui, B., Adelena, S.M. and Gueddari, M. (2015). "Effects of selective Withdrawal on hydrodynamics and water quality of a thermally stratified reservoir in the southern side of the Mediterranean sea: A simulation approach", Journal of Environmental Monitoring and Assessment, 187(5), 1-19.