Your search found 62 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 Ahmad, C. N. 1975. Plant uptake of water from a water table. Fort Collins, CO, USA: Colorado State University. xi, 88p. (Water management technical report no.41)
(Location: IWMI-HQ Call no: 631.7.2 G730 AHM Record No: H01214)
3 Kandpal, S. 1983. Organizational structure and its adequacy for environmental management: A case study of Ramganga Command Area Development Authority, U. P. A dissertation submitted to the Indian Institute of Public Administration, New Delhi, India in partial fulfillment of the requirements for the Advanced Professional Programme in Public Administration. v. p.
Irrigation efficiency ; Water management ; Soil salinity ; Soil water movement ; Waterlogging / India
(Location: IWMI-HQ Call no: 631.7.1 G635 KAN Record No: H02537)
4 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)
5 Klocke, N. C.; Martin, D. C.; Heermann, D. F. 1985. Soil evaporation and plant transpiration from irrigated crops. In American Society of Agricultural Engineers, Advances in evapotranspiration: Proceedings of the National Conference on Advances in Evapotranspiration, Chicago, Illinois, 16-17 December 1985. St. Joseph, MI, USA: ASAE. pp.335-341. (ASAE publication 14-85)
(Location: IWMI-HQ Call no: 631.7.5 G000 AME Record No: H03349)
6 Juo, A. S. R.; Lowe, J. A. (Eds.) 1986. The wetlands and rice in Subsaharan Africa: Proceedings of an International Conference on Wetland Utilization for Rice Production in Subsaharan Africa, Ibadan, Nigeria, 4-8 November 1985. Ibadan, Nigeria: IITA. 318p.
Soil classification ; Percolation ; Soil water movement ; Water balance ; Land development ; Irrigation ; Mechanization / Africa South of Sahara / Asia
(Location: IWMI-HQ Call no: 633.18 G000 JUO Record No: H03791)
7 Sahni, B. M.; Tagupa, C. A.; Early, A. C. 1981. Estimating water movement through flooded soils during crop growth in irrigated lowland rice fields: A progress report. Paper presented at IRRI Saturday Seminar, 26 September 1981. 34p.
Rice ; Irrigated farming ; Flood plains ; Soil water movement ; Water use efficiency ; Tertiary sector ; Regression analysis / Philippines
(Location: IWMI-HQ Call no: 631.7.2 G730 SAH Record No: H03933)
8 ASAE. 1987. Drainage design and management: Proceedings of the Fifth National Drainage Symposium, Chicago, 14-15 December 1987. St. Joseph, MI, USA: ASAE. viii, 439p. (ASAE publication 07-87)
Drainage ; Design ; Water management ; Soil water movement ; Subsurface drainage ; Water quality ; Simulation
(Location: IWMI-HQ Call no: 631.7.1 G000 ASA Record No: H04308)
9 Novak, M. D. 1988. Quasi-analytical solution of the soil water flow equation for problems of evaporation. Soil Science Society of America Journal, 52(4):916-928.
(Location: IWMI-HQ Call no: PER Record No: H04725)
10 Valiantzan, J. D.; Keekides, P. G.; Poulovassilis, A. 1988. An improvement to the one step outflow method for the determination of soil water diffusivities. Water Resources Research, 24(11):1911-1920.
(Location: IWMI-HQ Call no: PER Record No: H05205)
11 Clark, A. M.; Armstrong, A. C.; Parkinson, R. J. 1988. Field drainage and land management, a comparison of four long terms field. Agricultural Water Management, 14(1-4):113-124.
(Location: IWMI-HQ Call no: PER Record No: H05227)
12 Steenhuis, T. S.; Richard, T. L.; Parlange, M. G.; Aburims, S. O.; Geohring, L. D.; Parlang, J. V. 1988. Preferential flow influences on drainage of shallow sloping soils. Agricultural Water Management, 14(1-4):137-151.
(Location: IWMI-HQ Call no: PER Record No: H05228)
13 Charlie, W. A.; Osman, M. A. Expansive soils in Sudan. 14p. + tables.
(Location: IWMI-HQ Call no: P 1596 Record No: H07096)
14 Richards, L. A. (Ed.) 1968. Diagnosis and improvement of saline and alkali soils. New Delhi, India: Oxford & IBH Publishing Co. vii, 160p.
(Location: IWMI-HQ Call no: 631.4 G430 RIC Record No: H07844)
15 Pathmarajah, S.; Mapa, R. B. 1990. Characterization of soil water movement in reddish brown earth soils (Alfisol) In Thattil, R. O. (Ed.) Tropical agricultural research: Proceedings of the 2nd Annual Congress of the Postgraduate Institute of Agriculture, Peradeniya, 8-9 November 1990. Vol.2. Peradeniya, Sri Lanka: Postgraduate Institute of Agriculture. pp.101-113.
(Location: IWMI-HQ Call no: 630.72 G744 THA Record No: H010099)
16 Somawanshi, R. B.; Patil, A. H. 1986. Effects of irrigation and location of canal on the salinity of soil and underground water from different soil series. Journal of Maharashtra Agricultural University, 11(1):1-3.
(Location: IWMI-HQ Call no: P 3200 Record No: H010214)
17 Chu, S. T. 1993. Capillary-tube infiltration model. Journal of Irrigation and Drainage Engineering, 119(3):514-521.
(Location: IWMI-HQ Call no: PER Record No: H012851)
The concept of treating soil matrix as a bundle of capillary tubes was used extensively in the analytical description of hydraulic conductivity of unsaturated soils. Such a concept has seldom been used in the development of infiltration models. The advantage of considering soil matrix as a collection of capillary tubes is that the water flow in large tubes can be separated from the flow in small tubes. Such a separation is desirable in the study of soil macropore flow where the flow in large pores is primarily responsible for ground-water contamination and recharge. The purpose of this paper is to derive an infiltration model based on the concept of a bundle of capillary tubes for the study of soil macropore flow. The model presented a spatially varied wetting front and was an improvement over the Green-Ampt infiltration model, which predicted a constant depth front. The soil macropore flow was represented graphically as a finger on a depth-water content plot.
18 Qureshi, A. S. 1993; 1994. Application of SWATRE to predict soil water flow in a lysimeter. Lahore, Pakistan: WAPDA. Thesis submitted to the Department of Water Resources, Wageningen Agricultural University, The Netherlands; Also published as NRAP report no 59, 1994. vi, 47p. + annexes; 57p. (Publication no.141 / NRAP report no.59)
Soil water movement ; Flow measurement ; Water measurement ; Lysimetry ; Models ; Calibrations ; Drainage ; Computer techniques ; Groundwater ; Water balance ; Flow discharge / Pakistan
(Location: IWMI-HQ Call no: D 631.7.2 G730 QUR, 631.7.2 G730 QUR Record No: H013631)
19 Furuki, T. 1983. Water movement and requirements in paddyfields. In Nakagawa, S.; Nakagawa, M.; Matsumoto, A.; Chiba, T.; Iwamoto, S.; Iwasaki, K.; Matoba, Y.(Eds.), Advanced rice cultivation, irrigation and drainage technology in Japan. Tokyo, Japan: Fuji Marketing Research Co. pp.126-145.
Water requirements ; Paddy fields ; Evapotranspiration ; Percolation ; Soil water movement ; Water control ; Water balance / Japan
(Location: IWMI-HQ Call no: 631.7.2 G696 NAK Record No: H013568)
20 Hoogmoed, W. B.; Berkhout, J. A. A.; Stroosnijder, L. 1992. Soil tillage options for water management under erratic-rainfall conditions. Hommes Terre & Eaux, 22(7):40-45.
Soil management ; Water conservation ; Water management ; Tillage ; Rainfall-runoff relationships ; Erosion ; Infiltration ; Evaporation ; Simulation models ; Millets ; Crop production ; Weed control ; Soil water movement / West Africa / Sudan / Sahel
(Location: IWMI-HQ Call no: P 3254 Record No: H013732)
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