الفهرس 
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Abstract
Walied Morsy Ibrahim Hassan: Using Pulse Trickle Irrigation to Improve Moisture Distribution and Developing Mathematical Model for Irrigation Management. Unpublished Ph. D. Thesis, Department of Agricultural Engineering, Faculty of Agriculture, Ain Shams
University, 2017.
Numerical model was developed for predicating wetting front movement and soil moisture distribution from point source under continuous surface and pulse trickle irrigation was using Visual Basic of Applications 2013. The model combines the alternate direction implicit method (ADI) of solving two dimensional linear partial differential equations with the iterative Newton-Raphson method to advance through variable time. To validate the simulation model was divided into two steps. The first step, tested the validity of the model under the wetted front movement at selected times (120 min continuous, 180 min pulse 30 on/ 15 off, 240 min pulse 15 on/ 15off, and 360 min pulse 15 on/ 30 off), movements were compared between the predicted and observed results with discharge rates (1, 1.5, 2, 3, 4, 5, 6 and 8 l/hr).
The second step was testing the validity of the model under the soil moisture distribution, and comparing between the predicted and measured results at the previous selected times with the same discharge rates. The difference percent between the observed and predicted with a range of (-12.66 % to 19.2 %) for radius, depth of a range was (1.91 % to 17.22 %) and the coefficients of correlation of linear regression analysis between predicted and measured soil water content ranged from (0.7284 to 0.9333). The numerical model could be satisfactorily used to find out soil moisture movement and distribution under different conditions of continuous and pulse trickle irrigations.
Keywords: Continuous and pulse trickle irrigations, Numerical model,
ADI finite difference, Newton-Raphson method, Two dimensional flow model, Soil moisture movement.