Effect of irrigation systems on water-logging agricultural lands

Faculty Engineering Year: 2008
Type of Publication: Theses Pages: 303
Authors:
BibID 10651884
Keywords : Irrigation farming    
Abstract:
Water-logging is defined as the state of land in which the subsoilwater table is located at or near the surface with the result that theyield of crops commonly grown on it is reduced for the land, or if theland is not cultivated, it cannot be put to its normal use because of thehigh water table. Water-logging is serious problem in Egypt, becausethe land subjected to water logging results in reduction of agriculturalproduction. The main objectives of this study are:1- Study the effect of soil layer depth to impermeable layer, and soiltypes on water logging in agricultural lands.2- Study the effect of irrigation systems, and crop types on waterlogging.This study includes a theoretical study for water-logging time anddischarge with different types of soil and various Permeable layer depthsby computer program (Z-soil program). An experimental model isperformed using Surface Irrigation apparatus with different types of soiland various Permeable layer depths also. Verification betweenexperimental work and theoretical study is investigated.The effect of irrigation systems such as sprinkler, trickle, and surfacemethods on water-logging time is investigated with different crop types,soil types, layer depth, and latitude. Design curves for Egypt area aredrawn.EI-Salhiya is taken as an application of this study, because water-logging has appeared in some areas of El-Salhiya. Z-soil program isapplied on El-Salhiya soil type (sand soil with 172m layer depth).Different methods of irrigation are applied on El-Salhiya with cropswhich are cultivated in this area, and water-logging time is calculated. 
   
     
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