Drainage of Excess Irrigation Water at El-Rabwa City, Giza Governorate, Egypt.

ogila, waleed; Noha A. Rabie; Ali H. Al-batal;

Abstract


In arid and semi-arid regions, drainage of excess irrigation water is the next logical step towards improving water management in golf areas
and reducing the environmental impacts of subsurface drainage flow. The urbanization and land development in Egypt started more than three decades
ago. The construction activities extended from the narrow district in the Nile Valley and Delta toward the vast desert fringes. Desert soil is a problematic
soil that may include expansive and collapsible soils, sandstone and limestone in one site. Groundwater related problems in such sites are due to the
fact that the presence of water might not be taken into consideration during design and construction phases. El-Rabwa City is located in Giza
Governorate at about 25km west of Cairo City. The goal of this paper is to undertake a study of the drainage of irrigation water considering both the
topographic features of the ground and the subsurface layers that include impermeable clay layer with variable elevations. In addition, the study aims to
investigate possible influence of the excess water on the foundations of the residential units. Hair fractures of some residential units were observed in
the area. Excess of irrigation water was thought to be one of the most reasons of the observed fractures. A total of over 300 boreholes, supplemented by
additional investigation boreholes, were reviewed. The geotechnical data of the boreholes were used to develop geological model for the site. The
geological model of the site revealed the presence of top permeable layers (sand or fractured rock) underlain by impermeable clay layer. The surface
topography, together with the permeability of the subsurface layers, determines the division of the excess irrigation water to runoff and infiltration water.
The collected geotechnical data was used to study the topography of the subsurface clay layer that plays major role in determining the flow pattern of the
excess water portion that permeate or infiltrate to the subsurface. The identification of both the topography and the geological models of the subsurface
is a key factor in selection or the design of the alternative drainage systems for the excess irrigation water that are presented in the paper.


Other data

Title Drainage of Excess Irrigation Water at El-Rabwa City, Giza Governorate, Egypt.
Authors ogila, waleed ; Noha A. Rabie ; Ali H. Al-batal 
Keywords Excess irrigation water, drainage water, geological model, infiltration, Golf’s areas, arid areas. 1
Issue Date Feb-2014
Publisher International Journal of Scientific & Engineering Research
Journal International Journal of Scientific & Engineering Research 
ISSN 2229‐5518

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