Systems Dynamics Model to Assess Irrigation Networks | ||
| تحقیقات مهندسی صنایع غذایی | ||
| Article 3, Volume 11, Issue 4, January 0, Pages 35-56 PDF (457.96 K) | ||
| Document Type: Research Paper | ||
| Abstract | ||
| An assessment of irrigation networks shows that their utility is less than expected because of poor design and operation, lack of sufficient maintenance and poor management. Poor performance of irrigation networks is partly because of old components that require rehabilitation. Rehabilitation of irrigation systems are done case-by-case, which lacks integration and a systemic approach and has not led to appreciable improvement. The involvement of so many components in irrigation rehabilitation and their complex interactive relation on system performance requires a system dynamics approach. Simulation techniques must be explored that represent complex dynamic systems in a realistic way. System dynamics, a feedback-based object-oriented simulation approach, was used to model the rehabilitation of irrigation networks. The ease of model modification in response to changes in the system and the ability to perform sensitivity analysis make this approach attractive for modeling the rehabilitation. In this paper, the proposed approach was applied to rehabilitate irrigation networks where the main elements affecting the network utility were efficiency, adequacy, equity, flexibility and stability in water delivery. Several rehabilitation scenarios were considered and their effects on the performance element (efficiency) were investigated. The long-term impact of the system utility was determined using system dynamics modeling and the appropriate policies were selected. The Qazvin Irrigation Network was selected as a case study. The three scenarios for network rehabilitation were fixing the area under cultivation, decreasing drawdown of groundwater and increasing investment in rehabilitation projects. The effect of the scenarios on the efficiency of the system was calculated and the final impact on the system utility was determined. The results showed that all three scenarios improved system utility, however, fixing the area under cultivation showed the best improvement. | ||
| Keywords | ||
| Irrigation Networks Rehabilitation; system dynamics; simulation; Technical and Management Reform; Qazvin Irrigation Network | ||
| References | ||
|
Anon. 1998a. World Experiences of Irrigation Management Transfer. Iranian National Committee of Irrigation and Drainage. No 20. (in Farsi)
Anon. 1998b. Vensim PLE software version 3.0. Ventana Systems, Inc., 60 Jacob Gates Road, Harvard, Massachusetts.
Anon. 2002. How Design, Management and Policy Affect the Performance of Irrigation Projects.
Bagheri, A. 2006. Sustainable Development: Implementation in Urban Water Systems. PhD Thesis. Water Resources Engineering Department. Lund University. Sweden.
Hashemi, M. 2008. Performance Analysis of Irrigation Networks using Fuzzy and Logic Clustering (Case Study: Gazvin Irrigation Networks). M.Sc. Thesis. Department of Civil Engineering. Faculty of Engineering. Tarbiat Modares University. (in Farsi)
Hjörth, P. and Bagheri, A. 2006. Navigating towards sustainable development: A system dynamics approach. Futures 38(1): 74–92.
Kavekar, N. and Parvaresh Rizi, A. 2008. Study categorization on rehabilitation and modernization of irrigation networks. Proceedings of the 2nd Conference, Management of Irrigation and Drainage Networks, Shahid Chamran University. Ahvaz. (in Farsi)
Mohseni Movahed, A. and Monem, M. J. 2002. Developing model of performance assessment and optimal operation of irrigation networks. Proceedings of the 11th Congress. Iranian National Committee of Irrigation and Drainage. Tehran. Iran. (in Farsi)
Monem, M. J., Gaheri, A., Badzahr, A., Garavi, H., Borhan, N., Zolfagari, A., Sabeti, E. and Ehsani, M. 2000. Performance assessment of Qazvin irrigation networks using PSIAC Model. Proceedings of the 10th Congress. Iranian National Committee of Irrigation and Drainage. Tehran. Iran. (in Farsi)
Renault D., Facon, T. and Wahaj, R. 2007. Mapping system and services for canal operation techniques: The MASSCOTE Approach. 2007. USCID 4th International Conference on Irrigation and Drainage.
Siahi, M. K. 2007. Rehabilitation of Qazvin irrigation network. Technical Workshop on Rehabilitation, Modernization and Performance Improvement of Irrigation Networks. Faculty of Science. Tarbiat Modares University. (in Farsi)
Sohrabi, T., Ojaglo, H., Mosavi Yasori, E. and Verdinezhad, V. 2008. Investigation of conveyance and distribution efficiency in Qazvin irrigation network. Proceedings of the 2th Conference, Management of Irrigation and Drainage Networks. Shahid Chamran University. Ahvaz. (in Farsi)
Stave, K. 2002. A system dynamics model to facilitate public understanding of water management options in Las Vegas, Nevada. J. Environ. Manag. 67, 303-313.
Vaez Tehrani, M. and Monem, M. J. 2008. Modernization in irrigation networks. Proceedings of the 2th Conference, Management of Irrigation and Drainage Networks. Shahid Chamran University. Ahvaz. (in Farsi)
Vlachos, D., Georgiadis, P. and Iakovou, E. 2007. A system dynamics model for dynamic capacity planning of remanufacturing in closed-loop supply chains. Computers & Operations Research. 34(2): 367-394.
| ||
|
Statistics Article View: 1,597 PDF Download: 738 |
||
Journal management system. designed by sinaweb