Challenges of Irrigation Water Supply in Croplands of Arid Regions and their Environmental Consequences – A Case Study in the Dez and Moghan Command Areas of Iran

Authors: Lobat Taghavi, Najaf Hedayat

Abstract:

Renewable water resources are crucial production variables in arid and semi-arid regions where intensive agriculture is practiced to meet ever-increasing demand for food and fiber. This is crucial for the Dez and Moghan command areas where water delivery problems and adverse environmental issues are widespread. This paper aims to identify major problems areas using on-farm surveys of 200 farmers, agricultural extensionists and water suppliers which was complemented by secondary data and field observations during 2010- 2011 cultivating season. The SPSS package was used to analyze and synthesis data. Results indicated inappropriate canal operations in both schemes, though there was no unanimity about the underlying causes. Inequitable and inflexible distribution was found to be rooted in deficient hydraulic structures particularly in the main and secondary canals. The inadequacy and inflexibility of water scheduling regime was the underlying causes of recurring pest and disease spread which often led to the decline of crop yield and quality, although these were not disputed, the water suppliers were not prepared to link with the deficiencies in the operation of the main and secondary canals. They rather attributed these to the prevailing salinity; alkalinity, water table fluctuations and leaching of the valuable agro-chemical inputs from the plants- route zone with farreaching consequences. Examples of these include the pollution of ground and surface resources due to over-irrigation at the farm level which falls under the growers- own responsibility. Poor irrigation efficiency and adverse environmental problems were attributed to deficient and outdated farming practices that were in turn rooted in poor extension programs and irrational water charges.

Keywords: water delivery, inequity, inflexibility, conflicts, environmental impact, Dez and Moghan

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1331821

References:

[1] N. Hedayat, Improving the performance of water delivery in the Dez and Moghan irrigation schemes in Iran. Unpublished PhD thesis, Cranfield University, UK. , (2005).
[2] Tibor, G.J; Grigg, N.S; Helweg, O.J; Plusquellec, H; Burt, C M; Merriam, J.L; and
[3] B. Lankford, and J. Gowing, (1996). The impact of design approximations on the operational performance of an irrigation scheme. A case study in Malaysia. Irrigation and Drainage Systems 10, , (1996), p 193.
[4] F.N. Kerlinger, and H. Lee, Foundations of Behavioral Research, Fourth Edition, Harcourt College Publishers, USA, (2000).
[5] A. Field, Discovering statistics using SPSS for Windows, (2000).
[6] C. Butcher, Stakeholder Analysis, Guidance Notes. Drawn from a Technical Note on Enhancing Stakeholder, (2002). Participation (DFID, 1995), Guidance Manual on Water Supply and Sanitation programs (DFID/WELL, 1998) and Working Paper prepared for ODIO Holbey Shield Associates. (2000).
[7] H. Shirin, Simulation of sedimentation process in the Eastern cnal intake using the SHARC Model- A case study of the Dez diversion dam in Iran, (2009)..
[8] M. Bhutta, and E.J. Van Der Valde, Equity of water distribution along secondary canals in Punjab, Pakistan: In Irrigation and Drainage Systems 6, , (1992), p 161.
[9] The World Bank, Asia Water Resources Study. Volume I: Main Report" Asia Technical Department, Washington, D.C, USA, (1992a).
[10] The World Bank , Asia Water Resources Study. Volume II: Asia Technical Department, Washington, D.C. (1992 b).
[11] H. Plusquellec, Improving the Operations of Canal Irrigation System. The Economic Development Institute and The Agriculture and Rural Development Department of the World Bank. Washington D.C. (1988).
[12] V. Rudge, and J. Gowing, The Development of Framer Organised Abstraction Groups in East Anglia. In the Journal of the UK Irrigation Association, No 30, 2002, p 2.
[13] S.G. Dhillon, and T.C. Paul, Water delivery models for irrigation projects. Irrigation and Drainage Systems 2, (1988). p 43
[14] A.D. Beadle, M.A. Burton, I.K. Smout, and M.J. Snell, Integration of engineering, institutional and social requirements into rehabilitation design: A case study from Nepal .In Irrigation and Drainage Systems 2, (1988), p 79.
[15] M.A. Burton, and C.K Chiza, Water, conflict and environment: A case study from Tanzania. In Water: Economics, Management and Demand, Ed. Kay.M, Franks.T, and Smith, L.London: E&FN Spoon, (1997).
[16] C.R. Ali, M. Ashraf, T. Trout, W.A Mohsen,. M, Ahmad, M.A. Anwar , and M.W. Khan, Operational irrigation evaluations of three watercourse systems. Survey and research Organization, master planning and Review division. Publication No.1lahore: Pakistan Water and Power Development Authority: In Bhutta, M and Van Der Valde, E.J. (1992). Equity of water distribution along secondary canals in Punjab, Pakistan: In Irrigation and Drainage Systems6, 1978 p 161-.
[17] V. Rudge, and J. Gowing, The Development of Framer Organised Abstraction Groups in East Anglia. In the Journal of the UK Irrigation Association, No 30,2002, p 2.
[18] ,P Faeth, Agricultural policy and sustainability : case studies from India, Chile and the US. World Resource Institute. Washington DC. (1993).
[19] S.M.F. Islam, Modern technology adoption and sustainability of major food grains production in Bangladesh, Research Report, Department of agricultural Economics, BMSR Agricultural University, Salna, Gazipur, Bangladesh, (1998).
[20] H.M. Malano and G. Gao, Ranking and classification of irrigation system performance using fuzzy set theory: case studies in Australia and China: In irrigation and Drainage Systems 6, (1992), p129.
[21] T. Tanton, Developing the Aral Sea Basin. Paper presented at ICID technical meeting 16 Oct. 2002 ,ICE,London,UK. (2002).
[22] E. Wolff, .Irrigation and Drainage in the Amu Darya Basin, in Uzbekistan, (2002). (ICID Research Day, 19 March 2002, HR Wallingford, UK).
[23] D. Clark, Irrigation along the Syr Dara River. ICID News and Reviews, Issue 31spring 2001.Accessed http://www.icid.org.uk/newsandviews/31/worldw00.pdf
[24] F, Van steenbergen. and W. Oliemans. A review of policies in groundwater management in Pakistan, 1950-2000. water policy 4(4), 323-344.