Your search found 30 records
1 Wickham, T. H.; Valera, A.. 1978. Practices and accountability for better watershed management. In IRRI, Irrigation policy and management in Southeast Asia. Los Banos, Philippines: International Rice Research Institute. pp.61-75.
(Location: IWMI-HQ Call no: 631.7.8 G570 IRR Record No: H04582)
An overview of the results of several recent field studies on water management and distribution in the Philippine provinces of Laguna, Bulacan, and Nueva Ecija is presented. The diversion irrigation systems studied ranged from 3,600 to 75,000 ha in size. Factors found to have insignificant influence on the performance of the systems are farm-ditch density, the distances of farms from turnouts, and the rotation of water supplies at the farm level. But the location of farmers' fields along distribution canals and the rotation of water supplies among laterals or sublaterals markedly influenced the performance of the systems.
2 Cablayan, D.; Valera, A.. 1987. Irrigated diversified cropping constraints in the Philippines: A preliminary study. In IIMI. Irrigation management for diversified cropping. Digana Village, Sri Lanka: IIMI. pp.197-231.
(Location: IWMI-HQ Call no: IIMI-631.7.2 G000 IIM Record No: H003053)
(2.06 MB)
3 Valera, A.; Wickham, T. 1977. A field study on water use and duration of land preparation for lowland irrigated rice. Los Ba¤os, Laguna, Philippines: IRRI. 24p.
(Location: IWMI-HQ Call no: 631.7.1 G732 VAL Record No: H03475)
4 Valera, A.; Wickham, T. 1974. Land preparation in lowland rice: Its speed in relation to rate of water supply. Paper presented at the Philippine Society of Agricultural Engineers' Annual Convention, Manila, 18-19 April 1974. 17p.
(Location: IWMI-HQ Call no: P 219 Record No: H03974)
5 Wickham, T.; Valera, A.; Singh, V. P. 1977. Practices and accountability for better water management. Paper presented at the National Workshop on Land Consolidation, Bangkok, Thailand: Royal Irrigation Department, 27 June - 1 July 1977.
Water management ; Rotation ; Irrigation systems ; Land ; Statistics ; Farmer-agency interactions / Philippines
(Location: IWMI-HQ Call no: P 987 Record No: H04411)
6 Wickham, T.; Giron, O.; Valera, A.; Mejia, A. 1974. A field comparison of rotational and continuous irrigation in the upper Pampanga River Project. Paper presented at the IRRI Saturday Seminar, 3 August 1984. Paper no.74-15. 14p.
Irrigation systems ; Rotational flow ; Continuous flow ; Land ; Yields ; Soils ; Costs / Philippines
(Location: IWMI-SA Call no: P 174 Record No: H04480)
7 Valera, A.; Cablayan, D.; Flegado, A. B. 1988. Proposed draft guidelines for the management and operation of irrigation systems with diversified cropping. Paper presented at the National Workshop on Irrigation Management for Crop Diversification, Ternate, Cavite, Philippines, 5-7 October 1988. 36p.
Crops ; Diversification ; Water management ; Drought ; Planning ; Water distribution ; Irrigation scheduling ; Irrigation operation ; Monitoring ; Evaluation / Philippines
(Location: IWMI-HQ Call no: P 402 Record No: H04605)
8 Valera, A.; Wickham, T. 1976. Management of traditional and improved irrigation systems: Some findings from the Philippines. Paper presented at Choices in Irrigation Management Workshop, sponsored by the Agricultural Administrative Unit of the Overseas Development Institute, Cambridge, UK, 27 September - 1 October 1976. 15p.
Rehabilitation ; Irrigation programs ; Traditional farming ; Constraints ; Conjunctive use ; Water distribution ; Irrigation efficiency ; Irrigation management / Philippines
(Location: IWMI-HQ Call no: P 671 Record No: H04799)
9 Valera, A.; Cablayan, D. 1989. Studies in irrigated crop diversification. A paper presented to the Introduction to Diversified Crop Irrigation Seminar, Philippines, Dileman, Penthhouse, NIA, ESDA, 21 February 1989. 39p.
(Location: IWMI-HQ Call no: P 235 Record No: H05895)
10 Valera, A.; Panabokke, C. 1990. Irrigation issues affecting clayey soil management for non-rice production in rice-based systems. Paper presented at the IBSRAM Workshop on Management of Lowland Clayey Soils for Upland Crops After Rice in Asia, Khon Kaen, Thailand, 19-24 March 1990. pp.277-299.
(Location: IWMI-HQ Call no: P 194, IIMI 631.7.2 G000 VAL Record No: H06043)
11 Valera, A.; Cablayan, D.; Elegado, J. 1989. Irrigation management for diversified crops: Opportunities for learning and improvement. In Valera, A. (Ed.) Crop diversification in irrigated agriculture in the Philippines: Proceedings of a national workshop, Puerto Azul Beach and Country Club, Ternate Centre, The Philippines, 5-9 October 1989. pp.20-36.
Irrigation management ; Diversification ; Water allocation ; Optimization ; Rice ; Farmer participation / Philippines
(Location: IWMI-HQ Call no: IIMI 631.7.2 G732 VAL Record No: H004594)
(2.59 MB)
The interim results of the study as conducted by the International Irrigation Management Institute (IIMI) is presented. Existing practices of farmers and the National Irrigation Administration (NIA) personnel in managing the available water supply are highlighted. These practices were analyzed for possible adoption in other NIA systems. The paper also presents opportunities for improvements to optimize land and water use during the dry season. Limited water supply and suitable soils were the main physical factors that enabled farmers to effectively irrigate rice and non-rice crops during the dry season. The active involvement of the irrigators' association (IAs) in water allocation and distribution resulted in optimal or effective use of limited water supply. Further investigations into other factors, like the rice priority policy and other socio-economic incentives that will make irrigated crop diversification attractive and profitable to farmers were suggested.
12 Valera, A.; Cablayan, D.; Elegado, J. A. B. 1989. Proposed guidelines for the management and operation of irrigation systems with diversified cropping. In Valera, A. (Ed.) Crop diversification in irrigated agriculture in the Philippines: Proceedings of a national workshop, Puerto Azul Beach and Country Club, Ternate Centre, The Philippines, 5-9 October 1989. pp.230-2670.
Irrigation systems ; Irrigation management ; Operations ; Diversification ; Crops ; Water requirements / Philippines
(Location: IWMI-HQ Call no: IIMI 631.7.2 G732 VAL Record No: H006115)
(0.39 MB)
13 Bhuiyan, S.; Woodhead, T.; Miranda, S. M.; Murray Rust, H.; Parker, D.; Valera, A.; Magliano, A. 1989. Problems of irrigation management for rice-based farming systems: Progress report on the Rockfeller Foundation funded IIMI-IRRI collaborative project. Digana Village, Sri Lanka: International Irrigation Management Institute (IIMI) 50p.
Farming systems ; Rice ; Irrigation management ; Research projects ; Aid / Bangladesh / Indonesia / Philippines
(Location: IWMI-HQ Call no: IIMI 631.7.2 G000 BHU Record No: H006794)
(1.98 MB)
14 Wickham, T.; Valera, A.. Practices and accountability for better water management. In Indian Institute of Management, Irrigation Management: Background papers - Vol. 2. Bangalore, India: Indian Institute of Management. EVII:1-26.
(Location: IWMI-HQ Call no: 631.7.8 G000 IND Record No: H07221)
15 Cablayan, D. M.; Valera, A.; Simbahan, G.; Elegado, A.; Francisco, A.; Pascual, C. 1990. Simulation for optimum crop production in irrigation systems adopting diversified crops during the dry season. Paper presented at the Philippine Society of Agricultural Engineers 40th Annual Convention, Punta Villa, Iloilo City, Philippines, 25-28 April 1990. 53p.
(Location: IWMI HQ Call no: IIMI 631.7.2 CAB Record No: H007227)
(2.59 MB)
16 Valera, A.; Moya, T.; Cablayan, D.; Alagcan, M.; Early, A. C. 1983. A comparative assessment of three irrigation systems at Central Luzon: A progress report. IRRI Saturday seminar, 3 September 1983. 15p.
(Location: IWMI-HQ Call no: P 2585 Record No: H011389)
17 Valera, A.. 1992. IIMI-Nepal program's experience in strengthening national capacity. In Rao, P. S.; Abeywickrema, N. Review of IIMI's experience in strengthening national capacity for irrigation management and research. Part 1 and II.. Colombo, Sri Lanka: International Irrigation Management Institute (IIMI). pp.41-49.
(Location: IWMI-HQ Call no: IWMI 631.7.8 G000 RAO Record No: H011510)
(0.71 MB)
18 Pradhan, U.; Valera, A.. 1992. Issues and concepts related to participatory management: The context for Nepal. In Pant, S. R.; Valera, A.; Pradhan, U. (Eds.) Proceedings of the National Workshop on Participatory Management in Agency-managed Irrigation Systems in Nepal, Lazimpat, Kathmandu, Nepal, 29-30 April 1992. Kathmandu, Nepal: IIMI. Nepal Field Operations. pp.147-153.
Government ; Policy ; Irrigation management ; Farmer-agency interactions ; Farmer participation ; Legislation / Nepal
(Location: IWMI-HQ Call no: IIMI 631.7.3 G726 PAN Record No: H011556)
19 Giron, O. B.; Valera, A.; Wickham, T. 1974. New instrumentation for irrigation flow measurement. 10p.
(Location: IWMI-HQ Call no: P 2479 Record No: H011624)
20 Valera, A.. 1982. Research plan for the comparison of the different intensities of management at UPRIIS. A research outline prepared in August 1982. 14p.
(Location: IWMI-HQ Call no: P 2532 Record No: H011762)
Powered by DB/Text WebPublisher, from
