Your search found 6 records
1 Rijo, M.; Pereira, L. S. 1987. Measuring conveyance efficiencies to improve irrigation water management. Irrigation and Drainage Systems, 1(3):267-276.
(Location: IWMI-HQ Call no: PER Record No: H02912)
2 Pereira, L. S.; Rijo, M.; Teixeira, J. L. 1990. From upstream to real time management: Research for modelling in a surface irrigation system. In ICID Fourteenth International Congress on Irrigation and Drainage, Rio de Janeiro, Brazil: Transactions. New Delhi, India: ICID. Vol.1D Symposium (R1-R12):147-166.
(Location: IWMI-HQ Call no: ICID 631.7 G000 ICI Record No: H08785)
3 Rijo, M.; Almeida, A. B. 1993. Performance of an automatic upstream controlled irrigation system: Conveyance efficiencies. Irrigation and Drainage Systems, 7(3):161-172.
Water conveyance ; Flow measurement ; Flow control ; Water delivery performance ; Irrigation management / Portugal
(Location: IWMI-HQ Call no: PER Record No: H013081)
This paper presents a study of conveyance efficiencies in the Sorraia Irrigation Project, Portugal. The Irrigation Project is briefly described and flow measurement techniques are analyzed. Results show that efficiencies are higher during week days and normal labor hours and lower during weekends and at night. Water losses are higher than in other similar systems and the main reason is the substitution of the flow rotation method by restricted arranged schedules. An improvement process for saving water and accommodating deliveries to demands is also briefly presented.
4 Rijo, M.; de Almeida, A. B.; Pereira, L. S. 1991. Modelling automatic upstream control with SIMCAR. In Ritter, W. F. (Ed.), Irrigation and drainage: Proceedings of the 1991 National Conference sponsored by the Irrigation and Drainage Division of the American Society of Civil Engineers and the Hawaii Section, ASCE, Honolulu, Hawaii, July 22-26, 1991. New York, NY, USA: ASCE. pp.487-493.
Canal regulation techniques ; Simulation models ; Irrigation canals ; Networks / Portugal / Sorraia Irrigation Project
(Location: IWMI-HQ Call no: 631.7 G430 RIT Record No: H019909)
The model SIMCAR solves the gradually varied unsteady flow in a branched canal network with upstream control, with particular attention given to the simulation of the AMIL radial gates. It is based on the Saint-Venant system of equations, which are solved by a finite-difference technique with a four- point implicit scheme weighted in time and space. Model calibration and validation are made for the canal network of the Sorraia Irrigation Project, Portugal.
5 Rijo, M.. 2003. Local automatic control modes in an experimental irrigation canal. Irrigation and Drainage Systems, 17(3):179-193.
(Location: IWMI-HQ Call no: PER Record No: H032810)
6 Rijo, M.; Paulo, V. 1998. Canal water delivery system automation: A case study. In Pereira, L. S.; Gowing, J. W. (Eds.). Water and the environment: Innovation issues in irrigation and drainage: Selected papers of the 1st Inter-Regional Conference “Environment-Water: Innovative Issues in Irrigation and Drainage,” Lisbon, Portugal, Sept. 1998. London, UK: E & FN Spon. pp.274-282.
(Location: IWMI-HQ Call no: 631.7.1 G000 PER Record No: H039038)
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