Your search found 12 records
1 Weller, J. A.; Holmes, D. W.; Gunston, H. 1985. Irrigation water management study at Kaudulla, Sri Lanka: Summary report. Wallingford, UK: Hydraulics Research Station. 128p. (Hydraulics Research Station report no.OD/66)
Water management ; Rice ; Water use ; Evaporation ; Water budget / Sri Lanka / Kaudulla Irrigation Project
(Location: IWMI-HQ Call no: 631.7 G744 WEL Record No: H0404)
2 Holmes, D. W.; Wooldridge, R.; Weller, J. A.; Gunston, H.; Batchelor, C. H. 1984. Water management study at Kaudulla irrigation scheme, Sri Lanka. Wallingford, UK: Hydraulics Research Station. iv, 44, 64p.; x, 68, 70p. (Hydraulics Research Station report no. OD/29, OD/38)
Water management ; Irrigated farming ; Reservoirs ; Water use efficiency ; Evaporation ; Groundwater ; Water budget ; Drainage / Sri Lanka / Kaudulla Irrigation Project
(Location: IWMI-HQ Call no: 631.7.8 G744 HOL Record No: H0402)
3 Weller, J. A.. 1982. Water management study at Kaudulla irrigation scheme, Sri Lanka: Proposals for phase 4. Wallingford, UK: Hydraulics Research Station. 32p. (Hydraulics Research Station research proposal ODA 16/6)
Water management ; Research ; Canals ; Equity ; Water reuse / Sri Lanka / Kaudulla Irrigation Project
(Location: IWMI-HQ Call no: 631.7 G744 WEL Record No: H0628)
4 Weller, J. A.. 1981. Estimation of errors in canal seepage: Derived by discharge measurement in static and dynamic conditions. Wallingford, UK: Hydraulics Research Station. 31p. (Hydraulics Research Station report no.OD/25)
(Location: IWMI-HQ Call no: 631.7.2 G000 WEL Record No: H0685)
This report examines the effect of random errors in measured physical dimensions, on the determination of seepage from irrigation canals. Two methods of seepage measurements are discussed, namely ponding and inflow/outflow. The merits of each when used in both small and large canals are considered, and the circumstances requiring multi- determinational or continuous techniques are identified.
5 Pontin, J. M. A.; Abed, L.; Weller, J. A.. 1979. Prediction of seepage loss from the enlarged Ismailia canal. Wallingford: Hydraulics Research Station. 81p. (Hydraulics Research Station report no.OD/28)
(Location: IWMI-HQ Call no: 631.7.6.2 G232 PON Record No: H02)
This report describes the results of theoretical analytical and field studies related to the problems of seepage and lining of the enlarged Ismailia Canal, Egypt. Direct measurements of seepage from the canal are reviewed and analyzed. Future seepage is estimated by using idealized models, that however ignore the possible existence of natural sealing by Nile silt. To investigate this hypothesis the HRS In Vibro-corer was operated on the canal - the first application in freshwater conditions. Corers were retrieved from the canal bed in an 8km reach with moderate success. The efficiency of the corer is evaluated in detail from the data obtained. The cores were prepared and analyzed at the Delta Barrage Laboratory. The results are described herein with their implications on the sealing phenomenon. Suggestions for extending the present studies using direct seepage measurements are explained in order to arrive at a logical decision whether to proceed with lining the canal. The work is part of a continuing research co-operation with the Hydraulics and Sediment research Institute, Arab Republic of Egypt.
6 Weller, J. A.; Kumarasamy, N. 1987. An analysis of the performance of Kaudulla irrigation scheme based on five years of field data. Paper prepared for the 13th Congress of the ICID, Rabat, Morocco 1987. 27p.
Water management ; Evaluation ; Rice ; Tank irrigation ; Reservoirs ; Water distribution / Sri Lanka
(Location: IWMI-HQ Call no: P 918 Record No: H0976)
7 Abernethy, C. L.; Weller, J. A.. 1987. Water distribution within small farmer groups at Kaudulla, Sri Lanka. Wallingford, UK: Hydraulics Research Ltd. xxxiv, 32p. + annexes. (Report no.OD 67)
(Location: IWMI-HQ Call no: 631.7.1 G744 ABE Record No: H03508)
8 Weller, J. A.; Green, A. P. E. 1989. Interim report II - Water distribution at Porac Gumain River Irrigation System, early dry season 1985/86 to late dry season 1987. Wallingford, UK; Quezon City, Philippines: Hydraulics Research Ltd.; NIA. 21p. + tables, graphs. (Report OD/108)
(Location: IWMI-HQ Call no: 631.7.1 G732 WEL Record No: H06640)
9 Weller, J. A.. 1988. The vane flowmeter. In Proceedings of the International Conference on Irrigation System Evaluation and Water Management, Wuhan, China, 12-16 September 1988: Vols.1 & 2. Wuhan, China: Wuhan University of Hydraulic and Electrical Engineering. pp.908-923.
(Location: IWMI-HQ Call no: 631.7.8 G000 PRO Record No: H06724)
10 Weller, J. A.. 1991. An evaluation of the Porac River Irrigation System. Irrigation and Drainage Systems, 5(1):1-17.
(Location: IWMI-HQ Call no: PER Record No: H08863)
11 Weller, J. A.. 1987. Irrigation Design for Management Symposium - Field tour report. ODU Bulletin, April:10-11.
(Location: IWMI-HQ Call no: P 2687 Record No: H012163)
(0.22 MB)
12 Weller, J. A.. 1986. Water losses during irrigation operations. ODU Bulletin, October:4-8.
(Location: IWMI-HQ Call no: P 2689 Record No: H012166)
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