Your search found 492 records
1 Reddy, J. M.; Clyma, W. 1984. Optimal design of border irrigation systems. Cairo: Egypt Water Use and Management Project. vi, 34p. (EWUP technical report no.17)
Surface irrigation ; Hydraulics ; Irrigation design ; Crop yield ; Water rates ; Basin irrigation / Egypt
(Location: IWMI-HQ Call no: 631.7.2 G232 RED Record No: H044)
Using a surface irrigation hydraulics model, relationships were developed between water requirement efficiency and the system design variables. Acrop production function was utilized to relate crop yield to the water requirement efficiency. Gross returns from the crop, and the costs of water, labor, ditch construction and crop production were considered in the optimization problem. Several system constraints were incorporated into the design process. The generalized geometric programming technique was applied to the optimaldesign of border and basin irrigation systems. The design variables were: the length of the run, inflow rate into the border, time of inflow, number of lengths of run, width of the border, and the number of border widths in the field.
2 Bos, M. G. 1985. Long throated flumes and broad-crested weirs. Dordrecht, The Netherlands: Martinus Nijhoff/Dr W. Junk Publishers. xiii, 141 p.
(Location: IWMI-HQ Call no: 631.7.1 G000 BOS Record No: H0668)
3 Yitayew, M.; Reynolds, C. A.; Sheta, A. E. 1995. Bubbler irrigation system design and management. In Lamm, F. R. (Ed.), Microirrigation for a changing world: Conserving resources/preserving the environment: Proceedings of the Fifth International Microirrigation Congress, Hyatt Regency Orlando, Orlando, Florida, April 2-6, 1995. St. Joseph, MI, USA: ASAE. pp.402-413.
(Location: IWMI-HQ Call no: 631.7 G000 LAM Record No: H018879)
4 Warner, J. W.; Gates, T. K.; Fahim, W.; Ibrahim, M.; Awad, M.; Ley, T. W. 1984. Hydraulic conductivity and vertical leakage in the clay-silt layer of the Nile alluvium in Egypt. Cairo, Egypt: Egypt Water Use and Management Project. ix, 88p. (EWUP technical report no.60)
(Location: IWMI-HQ Call no: 631.7.2 G232 WAR Record No: H0878)
Data were collected from three sites in Egypt's Nile Valley and Delta to determine saturated hydraulic conductivity in the clay-silt water table aquifer and vertical leakage to the underlying Nile River sands. Auger hole test results gave saturated horizontal hydraulic conductivities of 1103 mm/day for Abyuha in the Middle Nile Valley, 197 mm/day for Beni Magdul near Cairo, and 103 mm/day for Abu Raya in the northern Delta. Auger hole, permeameter, and consolidation tests resulted in saturated vertical hydraulic conductivities of 0.03 to 4.9 mm/day for Abyuha, 0.03 to 0.87 mm/day for Beni Magdul, and 0.03 to 0.45 mm/day for Abu Raya. Several methods were used to determine vertical leakage: Darcy's law, water table decline, water budget, pumping test, and analytical solution. Average vertical leakage rates were very low for each site: 0.59 mm/day in Abyuha, 0.64 mm/day in Beni Magdul and 0.47 mm/day in Abu Raya. These results indicate poor natural drainage characteristics in the clay-silt layer which contribute to the high water table conditions observed throughout Egypt.
5 van Lee, T. n.d. Collection of irrigation service fees in Viet Nam. 9p.
(Location: IWMI-HQ Call no: 631.7.4 G784 VAN Record No: H0906)
6 Soil and Water Management Pilot Project. Hirakud Command Area, Sambalpur, India. n.d. Precast concrete structure: Concept, approach and design. 58p.
(Location: IWMI-HQ Call no: P 153 Record No: H0937)
7 Permanent Interstate Committee for Drought Control in the Sahel. 1981. Village hydraulics and rural development in the Sahel: Summary. Lome, Togo: Permanent Interstate Committee for Drought Control in the Sahel. 17 p. (Sahel D(80) 111)
(Location: IWMI-HQ Call no: 631.7.3 G152 PER Record No: H01085)
8 International Organization for Standardization. 1986. Irrigation equipment - Automatic irrigation systems - Hydraulic control. Switzerland: The Organization. 7 p. (ISO technical report 8059)
(Location: IWMI-HQ Record No: H01296)
9 Raadsma, S.; Schrale, G. (Comp.) 1971. Annotated bibliography on surface irrigation methods. Wageningen, The Netherlands: ILRI. 72p. (ILRI bibliography 9)
(Location: IWMI-HQ Call no: 631.7 G000 RAA Record No: H01691)
10 FAO. 1980. Drainage design factors: 28 questions and answers based on the Expert Consultation on Drainage Design Factors, Rome, 22-29 October 1979. Rome, Italy: FAO. vi, 52 p. (FAO irrigation and drainage paper no. 38)
(Location: IWMI-HQ Call no: 631.7.1 G000 FAO Record No: H01698)
11 SCETAGRI-GERSAR. 1985. Options and investment priorities in irrigation development: (Reconnaissance level): Final report on Mali. 2 Vols.
(Location: IWMI-HQ Call no: P 768 Record No: H02508)
Vol. 1 - Main report; Vol.2 - Appendices
12 Verwey, A. (Ed.) 1985. International colloquium on the role of micro-computers in hydraulic and hydrological research and education, Delft, 14-15 June 1984. Paris, France: UNESCO. ii, 93 p.
(Location: IWMI-HQ Call no: 001.64 G000 VER Record No: H02566)
13 Jones. L.; Willis, R.; Yeh, W. W. G. 1987. Optimal control of nonlinear groundwater hydraulics using differential dynamic programming. Water Resources Research, 23(11):2097-2106.
(Location: IWMI-HQ Call no: PER Record No: H02831)
Optimal groundwater management models are based on the hydraulic equations of the aquifer system. These equations relate the state variables of the groundwater system, the head, and the decision variables that control the magnitude, location, and timing of pumping, or artificial recharge. Several example problems illustrate the application of DDP to the optimal control of nonlinear groundwater hydraulics.
14 Merkley, G. P. 1987. Users manual for the PASCAL version of the USU main system hydraulic model. Logan, UT, USA: Utah State University. viii, 113 p. (WMS report 75)
(Location: IWMI-HQ Call no: 631.7.1 G000 MER Record No: H02835)
15 Dinar, A. 1987. Use of interdisciplinary models in extension: A case study of Rehovot region, Israel. Agricultural Administration and Extension, 24(3):165-176.
Irrigation management ; Irrigation programs ; Water allocation ; Tertiary level irrigation ; Irrigation efficiency ; Cotton ; Models ; Hydraulics ; Extension / Israel / Rehovot
(Location: IWMI-HQ Call no: PER Record No: H02904)
16 Shani, U.; Hanks, R. J.; Bresler, E.; Oliveira, C. A. S. 1987. Field method for estimating hydraulic conductivity and matric potential -water content relations. Soil Science Society of America Journal, 51(2):298-302.
(Location: IWMI-HQ Call no: PER Record No: H03000)
17 Mishra, A. 1997. Performance evaluation, operational policies and flow hydraulics of canal delivery and on-farm irrigation system. In Water Technology Centre for Eastern Region, WTCER annual report 1996 - 97. Bhubaneswar, India: WTCER. pp.29-39.
Performance evaluation ; Irrigation operation ; Policy ; Flow control ; Hydraulics ; Irrigation canals ; Water delivery ; Sedimentation ; Simulation / India / Puri Main Canal / Phulnakhara Distributary
(Location: IWMI-HQ Call no: 631.7.1 G635 WAT Record No: H022000)
18 Samani, H. M. V.; Naeeni, S. T. O. 1997. Optimization of water distribution networks. Water Resources Journal, 195:39-44.
(Location: IWMI-HQ Call no: PER Record No: H022012)
19 Reichard, E. G. 1987. Hydrologic influences on the potential benefits of basinwide groundwater management. Water Resources Research, 23(1):77-91.
Groundwater management ; Agriculture ; Stochastic process ; Hydraulics ; Basin irrigation ; Mathematical models ; Optimization ; Water use efficiency ; Reservoir storage ; Benefits
(Location: IWMI-HQ Call no: PER Record No: H03192)
20 Skaggs, R. W.; Miller, D. E.; Brooks, R. H. 1983. Soil water. Parts 1 & 2 : Properties, dynamics. In Jensen, M. E. (Ed.), Design and operation of farm irrigation systems. St. Joseph, MI, USA: ASAE. pp.77-142. (ASAE monograph no. 3)
(Location: IWMI-HQ Call no: 631.7.1 G000 JEN Record No: H03201)
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