Development of A Phosphorous Management Model For A Reservoir Using System Dynamic Simulation Approach

Document Type : Original Article

Authors

1 Assistant Professor, Faculty of Engineering, Tarbiat Moalem Unversity; Tehran, Iran

2 Professor, School of Civil Engineering, University of Tehran; Tehran, Iran

3 Assistant Professor, Faculty of Environment, University of Tehran; Tehran, Iran, Email:

Abstract

Eutrophication is one of the main environmental problems in dam reservoirs which affect the availability of water with suitable quality. Effective management and control of such phenomenon in a reservoir may support by implementation of low-complexity simulation models employing the most effective water quality parameters and processes. System dynamics (SD) is one of object oriented simulation tools that is able to simulate the eutrophication process in a reservoir according to the systemic approach and with emphasis on the causal relationships and feedbacks. In this paper, a system dynamic simulation model for phosphorous concentration of the Satarkhan reservoir in Eastern Azerbayejan Province, North-western Iran, has been developed. In this model, the phosphorous has been considered as the main factor of eutrophication. Also the interaction between the phosphorous in the reservoir and the bed sediment has been considered with monthly variable coefficients of phosphorous burial in sediments. Sensitivity analysis were made on the coefficients and calibration and validation of the model have then been achieved based on a 47 month period of data. Results showed an acceptable reliability in simulation of phosphorus concentration despite the simple assumptions used. Fractions of the phosphorous in the input, output, sediments, and the reservoir showed the significance of sediments in phosphorus concentration equilibrium. Analysis of scenarios regarding the reduction and increase of input load to the reservoir also showed that the impact of phosphorous input load reduction is at a smaller extent effective which should be considered in nutrient load management in the watershed.

Keywords

References

ارحامی، م.، تجریشی، م.، ابریشم‌چی، ا. (1381)، مطالعات شبیه‌سازی تغییرات کیفی آب مخزن سد لتیان، نشریه آب و فاضلاب، شماره 44
افشار، ع. ، سعادت‌پور، م. (1388)،  تغذیه گرایی مخازن سدها‌: مدل‌سازی دوبعدی مخزن کرخه، فصلنامه آب و فاضلاب اصفهان، شماره 71
ترابیان، ع. و هاشمی، س.ح. (1381)، «مدل‌سازی کیفی آب‌های سطحی، ضرایب، ثوابت، سینتیکها و فرمول‌ها»، انتشارات دانشگاه تهران، (ترجمه).
سارنگ، ا. ، تجریشی، م. و ابریشم‌چی، ا. (1380)،  شبیه سازی کیفی مخزن سد بوکان، فصلنامه آب و فاضلاب اصفهان، شماره 37
سمایی، م.ر. ، افشار، ع. ، غروی، م. (1383)،  مدل‌سازی فیتوپلانکتون زئوپلانکتون در مخازن با روش پویایی سیستم، فصلنامه آب و فاضلاب،  شماره 52
عیسی‌زاده س.، تجریشی، م.، ابریشم‌چی، ا. و احمدی، م. (1384)، کاربرد مدل‌های شبیه سازی فسفر در مخزن سد لتیان ، فصلنامه آب و فاضلاب ، شماره 54
مهندسین مشاور رویان، (1385)، مطالعات ارزیابی کیفیت آب سد ستارخان، ، شرکت سهامی آب منطقه‌ای آذربایجان شرقی و اردبیل
Chapra, S. (1997), Surface Water Quality Modeling, Mc-Graw Hill Int.
Chapra, S.C., (2003). Engineering water quality models and TMDLs. Journal of Water Resources Planning and Management 129, 247e256
Depinto J.,  Freedman  P., Dilks D., Larson W., (2004), Models Quantify The Total Maximum Daily Load Process, Journal of Environmental Engineering, ASCE ,Vol. 130, No. 6
Elshorbagy A., Ormsbee L, (2006), Object-oriented modeling approach to surface water quality management, Environmental Modelling & Software 21, pp.689-698,
Ford, (1999), A., Modeling the environment. An introduction to system dynamics modeling of environmental systems. Island press, Washington, DC.
Klapper H., (2003), Technologies for lake restoration,  Journal of  Limnol., 62(Suppl. 1): pp.73-90, 2003
Nash, J.E., Sutcliff, J.V., (1970), River flow forecasting through conceptual models. Part 1 – a discussion of principles. Journal of Hydrology 10 , pp. 282–290.
Ruley, J.E,. Rusch, K.A, (2004), Development of a simplified phosphorus management model for a shallow, subtropical, urban hypereutrophic lake, Ecological Engineering Vol.22, pp. 77–98
Shirmohammadi, A., Chaubey, I., Harmel, R., Bosch, D., Muñoz-Carpena, R., Dharmasri, D., Sexton, A., Arabi, M., Wolfe, M., Frankenberger, J., Graff, C., Sohrabi, t., (2006). Uncertainty In TMDL Models. American Society of Agricultural and Biological Engineers Vol. 49(4): pp.1033−1049
Thomann R V.,Mueller J.A., (1987), Principles of Surface Water Quality Modeling and Control, Harper & Row, New York
Vezjak M., Savsek T., Stuhler E.A., (1998), System dynamics of euthrophication processes in lakes, European Journal of Operational Research 109, pp. 442-451
Wetzel Robert G, (2001), Limnology of Lake and River Ecosystem, Academic Press
 
 

Files

History

  • Receive Date: 12 December 2010
  • Accept Date: 26 July 2011

Share

How to cite

Statistics