Your search found 3 records
1 Scott, V. H.; El-Falaky, A. A. 1984. Conjunctive water use: The state of the art and potential for Egypt. Cairo, Egypt: Egypt Water Use and Management Project. vii, 63p. (EWUP technical report no.44)
Water use ; Water resources ; Groundwater ; Drainage ; Energy ; Waterlogging ; Water management / Egypt
(Location: IWMI-HQ Call no: 631.7.5 G232 SCO Record No: H0101)
2 El-Falaky, A. M.; Scott, V. H.. 1984. Water quality of the irrigation canals, drains and groundwater in El-Minya, El-Mansuriya and El-Sheikh project sites. Cairo: Egypt Water Use and Management Project. vii, 120p. (EWUP project technical report no.62)
(Location: IWMI-HQ Call no: 631.7.6.3 G232 ELF Record No: H041)
A water quality monitoring analysis for the canals, drains and shallow groundwater in the three Project sites (i.e. Abyuha in El-Minya Governorate, El-Hammami and Beni Magdul in El-Mansuriya, Giza Governorate, and Abu Rayain Kafr El-Skeikh Governorate) was carried but during the period from March1982 to February 1983, for the purpose of studying quality changes with time, assessing the suitability of water for irrigation and providing a critically needed information for the conjunctive water use. The approach taken to evaluate water quality was based on "Guidelines" which indicate thepotential of irrigation water. However, the true suitability of a given water for irrigation depends on the management capability of the water user and the specific conditions of use. The chemical analysis showed that canal water is of good quality for irrigation purposes throughout the whole year. The water quality deteriorated while passing through the soil. The salinity and sodicity of the shallow groundwater were 3 to 7 times greater than those of canal water, indicating that the water is moderately saline and highly alkaline. On the other hand, the quality of drainage water varied widely from time to time during the year and also with the location on the drain section. On the average, the drainage water in Mansuriya area falls in the category of "causing increasing salinity and sodicity problems" when used in irrigation. In Kafr El-Sheikh, the drainage water could be classified as moderately saline and highly alkaline throughout most of the year except during winter closure where it increased appreciably to a degree which might cause a severe sodicity problem.
3 Angelakis, A. N.; Rolston, D. E.; Kadir, T. N.; Scott, V. H.. 1993. Soil-water distribution under trickle source. Journal of Irrigation and Drainage Engineering, 119(3):484-500.
(Location: IWMI-HQ Call no: PER Record No: H012849)
Soil-water distributions in homogeneous soil profiles of Yolo clay loam and Yolo sand irrigated from a circular source of water were measured at several times after initiation of irrigation. The effect of trickle discharge rates and soil type on the locations of the wetting front and soil-water content distributions were determined. Soil-water potential and hydraulic conductivity as a function of soil-water content, were also measured. A finite element solution of the two-dimensional transient soil-water equation, the theory of time-dependent, linearized infiltration from a circular source, the effective hemisphere model, and generalized solution for axially symmetric flow were compared with the experimental results. In general, the computed vertical advances of the wetting front were closely related to those observed for both soils. All of the solutions provided a better prediction of the wetting front positions for the clay-loam soil than for the sandy soil. The calculated and measured horizontal wetting fronts did not agree for large time, especially for the generalized solution. A more pronounced underprediction of the wetting front positions by the effective hemisphere theory occurred compared to those predicted by the linearized and finite element theories. Soil-water content distributions computed by linearized and numerical solutions, agreed reasonably with measured values in both soils.
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