Your search found 30 records
1 Merkley, G. P.; Pojsoontorn, C.; Kawsard, K.; Walker, W. R.; Skogerboe, G. V. 1988. USU irrigation main system hydraulic model: Replication of modeling capability in other countries. Logan, UT, USA: Utah State University. ix, 76p. (WMS report no.84)
Simulation models ; Hydraulics ; Mathematical models ; Irrigation programs ; Irrigation canals ; Computer techniques ; Flow regulators ; Water control ; Small scale systems / Thailand
(Location: IWMI-HQ Call no: 631.7.1 G000 MER Record No: H03422)
This report concerns the requirements for replicating the capability for hydraulic modeling of irrigation main systems with the USU Main System Hydraulic Model at different project sites and different countries. The computerized model was developed at Utah State University (USU) under the Water Management Synthesis II Project, funded and assisted by USAID through the Consortium for International Development. The information contained herein complements that which is found in the user's manual for the model
2 Merkley, G. P. 1988. Hydraulic modeling applications in main system management. Logan, UT, USA: Utah State University. xvi, 113p. (WMS report 74)
Hydraulics ; Models ; Primary level irrigation ; Irrigation management ; Evaluation ; Scheduling ; Flow regulators ; Computer techniques ; Water distribution ; Social aspects / Thailand
(Location: IWMI-HQ Call no: 631.7.1 G750 MER Record No: H04259)
3 Mishra, P. K.; Larsen, O.; Satyanarayana, T. 1990. Development of low-discharge Baffle-Sluice modules. Journal of Irrigation and Drainage Engineering, 116(3):444-453.
(Location: IWMI-HQ Call no: PER Record No: H06352)
4 Replogle, J. A. 1989. Obstacles to flow control and measurement in irrigation practice. In Rydzewski, J. R.; Ward, C. F. (Eds.) Irrigation theory and practice. Proceedings of the International Conference, University of Southampton, 12-15 September. London: Pentech Press. pp.802-813.
Technology ; Irrigation practices ; Water delivery ; Flow measurement ; Flow regulators ; Case studies / USA / Asia
(Location: IWMI-HQ Call no: 631.7 G000 RYD Record No: H07561)
5 Yardeni, A. Pulsation for better drip irrigation. Water and Irrigation Review, pp.8-12.
(Location: IWMI-HQ Call no: P 1762 Record No: H07632)
6 1990. Innovation and application of appropriate tool in irrigation water management. A publication of the Irrigation Management Project. iii, 5p. (IMP occasional paper no.2)
(Location: IWMI-HQ Call no: P 1985 Record No: H08576)
Mathematical models ; Computer techniques ; Hydraulics ; Flow regulators ; Irrigation canals / Sri Lanka / Kirindi Oya
(Location: IWMI-HQ Call no: IIMI 631.7.1 G744 CEM Record No: H08926)
8 Malaterre, P- O. 1989. A study of the Kirindi Oya right bank main canal operations through an application of a mathematical flow simulation model: prospect of improving performance. Final report of a study for ENGREF/CEMAGREF/IIMI and University of Montpelier, France. Colombo, Sri Lanka: International Irrigation Management Institute (IIMI). v, 108p.
Irrigation canals ; Simulation models ; Flow regulators ; Computer techniques / Sri Lanka / Kirindi Oya Irrigation and Settlement Project
(Location: IWMI HQ Call no: IIMI 631.7.1 G744 MAL Record No: H008927)
(3 MB)
9 Sriramany, C.; Goonasekera, K. G. A.; Jayasekera, A. A. 1991. A preliminary investigation of suitable low cost material for drip emitters. Agricultural Engineering, 3(1):25-31.
(Location: IWMI-HQ Call no: P 2048 Record No: H09092)
10 Smith, J. L.; Reddy, J. M.; Pochop, L. O.; Lewis, R. W. 1991. Design of turbulent fountain irrigation trash screen. Irrigation and Drainage Systems, 5(3):267-275.
(Location: IWMI-HQ Call no: PER Record No: H09262)
11 Merriam, J. L. 1973. Float valve provides variable flow rates at low pressures. Paper presented at ASCE Irrigation and Drainage Division Specialty Conference, Fort Collins, Colorado, 23 April, 1973. 19p.
(Location: IWMI-HQ Call no: P 2114 Record No: H09063)
12 Liu, F.; Feyen, J.; Berlamont, J. 1992. Computation method for regulating unsteady flow in open channels. Journal of Irrigation and Drainage Engineering, 118(10):674-689.
(Location: IWMI-HQ Call no: PER Record No: H011292)
13 Steele, D. J. 1993. New low-volume technology simplifies conversion. Irrigation Journal, 43(3):16-18.
Irrigation engineering ; Drip irrigation ; Flow regulators ; Irrigation equipment / USA / California
(Location: IWMI-HQ Call no: P 3240, PER Record No: H012469)
14 Logar, R. H. 1992. Waterhammer for rapid closure of pipelines with a varying diameter. Water Resources Journal, March:21-28.
(Location: IWMI-HQ Call no: PER Record No: H012976)
15 Bari, M. F. 1993. Hydraulic model investigation of downstream erosion of large regulators: A case study. Irrigation and Drainage Systems, 7(2):131-150.
(Location: IWMI-HQ Call no: PER Record No: H013683)
Flow conditions, which could not be explained, occurred in the stilling basin and outfall channel of the Feni Regulator sited at the western end of the Feni River closure dam. This regulator controls outflows from the upstream reservoir which supplies irrigation water to Muhuri Project in Bangladesh. Analysis of flood discharge data revealed that the design discharge for the structure was not exceeded; yet abnormal scour occurred in the outfall channel and the brick block rip-rap placed thereon was damaged. A model study was conducted to understand the causes of such unusual local erosion downstream of the stilling basin and to provide answers to two main questions: - Is potential scour serious in terms of the stability of the structure? - What protection measures could be taken to stabilize the scour at a safe level? Using a 1:30 scale model, the probable maximum scour was simulated, and the performance of alternative rip-rap designs including that of the existing one were examined. The results of this study supplemented by field scour data collected during subsequent flood seasons indicated that even if the flow rate through the regulator approaches the design flood discharge, the downstream scour is not likely to extend up to an elevation of - 10.7m, a scour level observed in the previous year at a lower discharge. It also showed that the existing rip-rap blocks were marginally undersized and consequently the rip-rap was prone to failure if flow conditions departed from uniform. A suitable method of scour protection downstream of the stilling basin at the regulator exit also evolved from the study.
16 Swamee, P. K.; Pathak, S. K.; Ali, M. S. 1993. Analysis of rectangular side sluice gate. Journal of Irrigation and Drainage Engineering, 119(6):1026-1035.
(Location: IWMI-HQ Call no: PER Record No: H013676)
A side sluice gate is a flow-regulation device widely used in irrigation works for diverting the flow from a main channel to a secondary channel. The discharge of a side sluice gate may be obtained through the concept of an elementary discharge coefficient for an elementary strip along the gate length. Similar to the case of a normal sluice gate, the elementary discharge coeffient for a side sluice gate has been found to be a function of channel flow depth to the gate opening ratio for free-flow conditions. It depends on an additional parameter, namely, the ratio of the crest width to the gate opening for submerged-flow conditions. For a broad-crested side sluice gate, the discharge coefficient involves still one more parameter: the ratio of the crest width to the gate opening.
17 Fraisse, C. W.; Heermann, D. F.; Duke, H, R. 1992. Modified linear move system for experimental water application. In Feyen, J.; Mwendera, E.; Badji, M. (Eds.), Advances in planning, design and management of irrigation systems as related to sustainable land use: Proceedings of an International Conference organized by the Center for Irrigation Engineering of the Katholieke Universiteit Leuven in cooperation with the European Committee for Water Resources Management, Leuven, Belgium, 14-17 September 1992. Vol. 1. Leuven, Belgium: Center for Irrigation Engineering. pp.367-376.
Research ; Water distribution ; Irrigation equipment ; Flow regulators ; Sprinkler irrigation ; Mathematical models ; Monitoring ; Crop-based irrigation
(Location: IWMI-HQ Call no: 631.7.1 G000 FEY Record No: H014366)
The use of linear move system for experimental water application requires a control much more sophisticated than one for normal field operations. The problem increases in complexity when the field irrigated is divided into small research plots in both advance and lateral directions. The current study investigates the application of the concept of pulse irrigation as a way to apply the different water treatments required in a research field. A laboratory setup was built in which solenoid valves are used to control the flow to each spray head or set of spray heads. Results have shown that pulse irrigation is feasible with commercially available solenoid valves and that water distribution patterns are minimally affected by pulsing the system. They also show that the frequency of operation is limited by the valve's response time which can vary for the different brands and models available in the market.
18 Wang, Z.; Reddy, J. M.; Feyen, J. 1995. Improved 0-1 programming model for optimal flow scheduling in irrigation canals. Irrigation and Drainage Systems, 9(2):105-116.
Irrigation canals ; Irrigation scheduling ; Mathematical models ; Flow control ; Flow regulators ; Computer techniques ; Optimization / China
(Location: IWMI-HQ Call no: PER Record No: H017431)
An improved 0-1 programming model was presented for optimal flow regulation and optimal grouping and sequencing of outlets in irrigation distributaries, under restrictions of both the rotational period and the incoming flow rate into distributaries. The problem was solved using a commercially available 0-1 programming software package. The example computations indicated that this model could effectively provide a constant flow rate into the canal during most of the rotation period, and thus reduce the frequency of headgate operation. This formulation also minimized the accidental water wastage by appropriately sizing the canal cross-section.
19 Replogle, J. A. 1997. Portable, adjustable flow-measuring flume for small canals. Transactions of the ASAE, 25(5):928-933.
Irrigation canals ; Flow control ; Flow regulators ; Flumes ; Design ; Measuring instruments ; Calibrations ; Computer software / USA / Arizona / Yuma / Wellton-Mohawk
(Location: IWMI-HQ Call no: P 4508 Record No: H020525)
20 Bautista, E.; Clemmens, A. J.; Strelkoff, T. 1997. Comparison of numerical procedures for gate stroking. Journal of Irrigation and Drainage Engineering, 123(2):129-136.
Open channels ; Mathematical models ; Water conveyance ; Water distribution ; Equity ; Flow regulators ; Gates ; Pumps ; Flow control
(Location: IWMI-HQ Call no: PER Record No: H021091)
Powered by DB/Text WebPublisher, from
