Abstract
This paper presents a study of conveyance efficiencies of Canal de Salvaterra, in the Sorraia Irrigation Project, Portugal. The Canal and the Project are briefly described and the water measurement techniques and structures utilized are analysed. Results comprise the main aspects of the inflow-outflow balance with identification of water losses and conveyance efficiencies. Analysing the results showed that irrigation efficiencies are higher during work days and labour hours and lower during weekends and at night. This identified the need to improve operation and management of the irrigation system, adapting inflow to demand according travel time and response time of the conveyance (and distribution) system, of the different main sections of the system.
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References
Bauzil V. 1952. Traité d'Irrigation. E. Eyrolles, Paris.
Bos M.G. 1979. Standards for irrigation efficiencies. Journal of the Irrigation and Drainage Division, ASCE, 105 (IR1): 37–43.
Bos M.G. 1985. Long-Throated Flumes and Broad Crested Weirs. Martinnus Nijhoff/Dr. W. Junk Publishers, Dordrecht.
Bos M.G. & Nugteren J. 1983. On Irrigation Efficiencies. ILRI Publication 19 (3rd ed.), Wageningen.
Bos M.G., Reploge J.A. & Clemmens A.J. 1984. Flow Measuring Flumes for Open Channel Systems. John Wiley, New York.
Kraatz D.B. & Mahajan I.K. 1975. Small Hydraulic Structures. Irrigation and Drainage Paper 26, FAO, Rome.
Pereira L.S. 1987. Modernisation of irrigation systems: a case of research oriented to design in Sorraia Valley, Portugal. Paper to Asian Regional Symposium Irrigation Design for Management (IIMI, Digana, Sri Lanka, Feb. 1987).
Reploge J.A. & Bos M.G. 1982. Flow measuring flumes: application to irrigation water management. Hillel D. In: Advances in Irrigation. Academic Press, New York, pp. 147–217.
Reploge J.A. & Clemmens A.J. 1982. Measuring flumes of simplified construction. Trans. ASAE, 24 (2): 362–374.
Rijo M. 1986. Aplicção de um Modelo Matemático ao Canal de Salvaterra. Tese de Mestrado em Hidráulica e Recursos Hídricos, Universidade Técnica de Lisboa, Lisboa.
Rijo M. & Pereira L.S. 1986. Conveyance efficiencies of Canal de Salvaterra. A study aiming improved irrigation water management. In: Proc. XIV European Regional Conference of ICID, Vol. II: 293–308.
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Rijo, M., Pereira, L.S. Measuring conveyance efficiencies to improve irrigation water management. Irrig Drainage Syst 1, 267–276 (1987). https://doi.org/10.1007/BF01102935
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DOI: https://doi.org/10.1007/BF01102935