Your search found 246 records
1 Moustafa, A. T. A.; Tinsley, R.L. 1984. Influence of soil properties on irrigation management in Egypt. Cairo, Egypt: Egypt Water Use and Management Project. vii, 66p. (EWUP technical report no.64)
Vertisols ; Clay minerals ; Subsurface drainage ; Seepage ; Soil water movement ; Water table ; Sandy soils / Egypt
(Location: IWMI-HQ Call no: 631.7.2 G232 MOU Record No: H0034)
On three of the four distributary canals studied by EWUP, the soils were mostly alluvial clay soil (vertisols) or a vertic subgroup of the entisols. The remaining distributary canal was all sandy Entisols. Vertisols are as oil order composed of heavy, clay soils containing large quantities of clay minerals which expand when wet and contract when dry. Irrigating these soils requires recognizing that the root penetration and measurable soil water changes are restricted to the top 40 cm. This limits the operational available water to 5 to 7 cm. The water infiltration rate during an irrigation can have a hundred fold decline during a 2 hour irrigation, ending with almost sealed conditions. This allows highly uniform application over a large area almost independent of available flow rate. Soil sealing requires a potential for surface drainage to prevent crop suffocation. After an irrigation, redistribution tends to be very slow, with the possibility in winter of it requiring 15 days for a wetting fringe to drain 30 cm. The high infiltration rates in the sandy soils make them basically unsuited for surface irrigation. It is therefore difficult to surface irrigate them efficiently. High water tables occur with large volumes of subsurface water flow. A de facto sub-irrigation system results in which farmers applying water to their field sub-irrigate their neighbors and vise-versa. Some farmers, far from the water source, actually receive more water than their crops required.
2 Pontin, J. M. A.; Wooldridge, R. 1978. A study of hafir linings in Darfur Province, Western Sudan. Wallingford, UK: Hydraulics Research Station. 58p. (Hydraulics Research Station report no.OD/10)
(Location: IWMI-HQ Call no: 631.7.1 G146 PON Record No: H0279)
3 Trout, T.; Bowers, S. A. 1979. Operational irrigation evaluation of Pakistan watercourse conveyance systems. Fort Collins, CO, USA: Colorado State University. xvi, 104p. (Water management technical report no.52)
Watercourses ; Flumes ; Flow measurement ; Water loss ; Seepage ; Tube well irrigation ; Evaluation / Pakistan
(Location: IWMI-HQ Call no: 631.7.8 G730 TRO Record No: H0340)
Five Pakistan watercourse systems, selected from various areas of the Indus Basin, were evaluated during complete irrigation turn rotations while operating normally. This allowed quantification of the various types of water losses, including transient condition losses such as dead storage, bank wash-outs, outlet leakage, and high initial seepage into dry channel banks.
4 ICID. 1967. World-wide survey of experiments and results on the prevention of evaporation losses from reservoirs. New Delhi, India: ICID. vi, 144 p.
(Location: IWMI-HQ Call no: 631.7.5 G000 ICI Record No: H0519)
5 Pontin, J. M. A. 1978. Principles of canal seepage measurement by Bell-type bed penetration systems. Wallingford, UK: Hydraulics Research Station. 14p. (Hydraulics Research Station report no.OD/13)
(Location: IWMI-HQ Call no: 631.7.1 G000 PON Record No: H0686)
The principles and theory used in the design and operation of bell- type systems for the measurement of local canal bed seepage are explained and developed. The steady and non-steady state modes are treated separately with particular care to discuss the basic assumptions involved for each condition. The derivation of governing equations follows a parallel course to that originally introduced by Bouwer and is self-contained. Some comparison of the 2 points of view is presented accompanied by a discussion of weak points desiring research attention.
6 Sethaputra, S.; Kirdpitagsa, C.; Nopmongcol, P.; Apichartvullop, A.; Sithilertprasit, S.; Masanate, V.; Termsak, P. 1979. Nam Pong environmental management research project: Hydrological studies. Bangkok, Thailand: Mekong Secretariat. ix, 225 p. (Nam Pong environmental management research project working document no. 10)
Dams ; Water balance ; Seepage ; Groundwater ; Irrigation effects ; Precipitation ; Irrigation efficiency / Thailand / Northeast Thailand
(Location: IWMI-HQ Call no: 631.7.5 G750 SET Record No: H0743)
7 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.
8 ESCAP. 1982. Proceedings of the Seminar on the Improvement of Irrigation Performance at the Project Level, held at Krasnodar, USSR, 25 August to 5 September 1980. New York, NY, USA: UN. 111p. (ESCAP water resources series no.56)
Irrigation programs ; Project appraisal ; Irrigation operation ; Maintenance ; Training ; Research ; Water resources development ; Settlement ; Economic aspects ; Irrigated farming ; Seepage ; Evaporation ; Water reuse
(Location: IWMI-HQ Call no: 631.7.8 G000 ESC Record No: H0823)
9 Nikapitiya, K. A. T.; Goto, M. 1977. Some aspects of water management in dry zone areas in Sri Lanka. Colombo, Sri Lanka: Irrigation Department. 85p.
Water management ; Soil moisture ; Irrigation ; Water distribution ; Water loss ; Drainage ; Evaporation ; Evapotranspiration ; Seepage ; Agricultural production ; Water use efficiency / Sri Lanka
(Location: IWMI-HQ Call no: 631.7.6 G744 NIK Record No: H0948)
10 Krynine, D. P. 1947. Soil mechanics: Its principles and structured application. 2 New York, NY, USA: McGraw-Hill. xv, 511p.
(Location: IWMI-HQ Call no: 631.4 G000 KRY Record No: H01144)
11 CARITAS-CRS Irrigation Project. 1979. Practical use and management of irrigation water. ADAB News, 6(10):3-5.
(Location: IWMI-HQ Call no: 631.7.6 G584 BON Record No: H01655)
12 Trout, T.; Reuss, J. 1978. Utilizing irrigation seepage for groundwater storage. Fort Collins, CO, USA: Colorado State University. 14p. (Water management research field report no.8)
(Location: IWMI-HQ Call no: 631.7.6.3 G730 TRO Record No: H01910)
13 Dharmasena, P. B. 1985. System loss studies of village tanks. Tropical Agriculturist, 141:95-108.
(Location: IWMI-HQ Call no: P 1311 Record No: H02217)
14 Yoder, R. 1981. Measurement of seepage and percolation in rice fields using improved sloping gauge. Unpublished manuscript. 5p.
(Location: IWMI-HQ Call no: P 198 Record No: H02237)
15 Hotes, F. L.; Kruse, E. G.; Christopher, W.; Niaz, S. 1985. Irrigation canal seepage and its measurement: A state of the art review. In Keyes, C. G. Jr., Ward, T. J., Development and management aspects of irrigation and drainage systems: Proceedings of the speciality conference, San Antonio, Texas. New York, NY, USA: ASCE. pp.93-105.
(Location: IWMI-HQ Call no: 631.7.8 G000 KEY Record No: H02838)
16 Ochs, W. J.; Willardson, L. S.; Camp, R. Jr.; Donnan, W.; Winger, R. J. Jr.; Johnston, W. R. 1983. Drainage requirements and systems. In Jensen, M. E. (Ed.), Design and operation of farm irrigation systems. St. Joseph, MI, USA: ASAE. pp.235-277. (ASAE monograph no. 3)
(Location: IWMI-HQ Call no: 631.7.1 G000 JEN Record No: H03204)
17 American Society of Agricultural Engineers. 1986. Transactions of the ASAE: Special edition - Soil and Water, Vol. 29 SW. St. Joseph, MI, USA: ASAE. pp.97-1706.
(Location: IWMI-HQ Call no: 631.4 G000 AME Record No: H03358)
This special Soil and Water Edition of Transactions of the ASAE contains all articles approved by the ASAE Soil and Water Division Editor for publication in the 1986 General Edition - Vol. 29, Numbers 1 through 6. All articles have the same folios or page numbers they had in the earlier publication.
18 Wickham, T. 1974. Tropical lowland rice: Some findings regarding its water requirements and yield loss due to drought. Paper presented at Third IRRI Workshop on Field Experimentation, 2 April 1974. 25p.
(Location: IWMI-HQ Call no: P 236 Record No: H03431)
19 Bhuiyan, S. I.; Palanisami, K. 1987. Increasing efficiency of water use on irrigated rice farms. In International Rice Research Conference, Hangzhou, China, 21-25 September 1987. 24p.
Rice ; Water use efficiency ; Irrigated farming ; Percolation ; Evapotranspiration ; Seepage ; Surface runoff ; Tillage ; Tank irrigation ; Deep tube wells / India / Philippines
(Location: IWMI-HQ Call no: 633.18 G000 INT Record No: H04091)
20 Sanmuganathan, K.; Dhillon, G. S. 1987. Some research and development relevant to management of water resources in Punjab. Wallingford, UK: Hydraulics Research Ltd. 12p. (Hydraulics Research OD/P 41)
Water resource management ; Canals ; Seepage ; Land reclamation ; Sedimentation ; Mathematical models ; Remote sensing / India / Punjab
(Location: IWMI-HQ Call no: 631.7.8 G635 SAN Record No: H04167)
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