Soil Wetting Pattern from Subsurface Drip Irrigation as Affected by Application of a Polyacrylamide Layer†

2015 ◽  
Vol 64 (5) ◽  
pp. 609-618 ◽  
Author(s):  
Tarek K. Zin El-Abedin ◽  
Mohamed A. Mattar ◽  
A. A. Alazba
Keyword(s):  
Drip Irrigation ◽  
Subsurface Drip Irrigation ◽  
Soil Wetting ◽  
Subsurface Drip ◽  
Wetting Pattern

Simulation of soil wetting pattern with subsurface drip irrigation from line source

2006 ◽  
Vol 83 (1-2) ◽  
pp. 130-134 ◽  
Author(s):  
D.K. Singh ◽  
T.B.S. Rajput ◽  
D.K. Singh ◽  
H.S. Sikarwar ◽  
R.N. Sahoo ◽  
...  
Keyword(s):  
Drip Irrigation ◽  
Line Source ◽  
Subsurface Drip Irrigation ◽  
Soil Wetting ◽  
Subsurface Drip ◽  
Wetting Pattern

scholarly journals Predicting Wetting Patterns in Soil from a Single Subsurface Drip Irrigation System

2019 ◽  
Vol 25 (9) ◽  
pp. 41-53
Author(s):  
Heba Najem Abid ◽  
Maysoon Basheer Abid
Keyword(s):  
Drip Irrigation ◽  
Sandy Loam ◽  
Irrigation System ◽  
Subsurface Drip Irrigation ◽  
Statistical Parameters ◽  
Model Efficiency ◽  
Loam Soil ◽  
Wetted Area ◽  
Soil Wetting ◽  
Subsurface Drip

Soil wetted pattern from a subsurface drip plays great importance in the design of subsurface drip irrigation (SDI) system for delivering the required water directly to the roots of the plant. An equation to estimate the dimensions of the wetted area in soil are taking into account water uptake by roots is simulated numerically using HYDRUS (2D/3D) software. In this paper, three soil textures namely loamy sand, sandy loam, and loam soil were used with three different types of crops tomato, pepper, and cucumber, respectively, and different values of drip discharge, drip depth, and initial soil moisture content were proposed. The soil wetting patterns were obtained at every thirty minutes for a total time of irrigation equal to three hours. Equations for wetted width and depth were predicted and evaluated by utilizing the statistical parameters (model efficiency (EF), and root mean square error (RMSE)). The model efficiency was more than 95%, and RMSE did not exceed 0.64 cm for three soils. This shows that evolved formula can be utilized to describe the soil wetting pattern from SDI system with good accuracy.      

scholarly journals Numerical Simulation of Soil Water from Subsurface Drip Irrigation for Fine and Medium Textures

2019 ◽  
Vol 26 (4) ◽  
pp. 1-8
Author(s):  
Heba Najem Abid ◽  
Maysoon Basheer Abid
Keyword(s):  
Numerical Simulation ◽  
Drip Irrigation ◽  
Field Experiments ◽  
Initial Moisture Content ◽  
Subsurface Drip Irrigation ◽  
Irrigation Time ◽  
Wetted Area ◽  
Soil Wetting ◽  
Subsurface Drip ◽  
Good Agreement

Subsurface drip irrigation is one of the modern irrigation techniques that assist to control applied water by providing water to plant roots by drippers.  Numerical simulation by using HYDRUS (2D/3D) was used to develop a formulas for estimating wetted area from subsurface drip irrigation together with water uptake by roots. In this study, two soil types, namely sand and sandy clay loam, were used with two types of crops, (tomatoes and onions). Different values of initial moisture content of soil, drip depth, and drip discharge were used in the simulation. The soil wetting patterns were analyzed each half an hour for three hours of irrigation time, and five initial soil moisture contents and different flow rates. To verify the results gained by applying HYDRUS (2D/3D)  a field experiment was carried out to measure the wetted width and compare measured values with simulated values. Formulas for wetted width and depth were developed. The performance of the model was evaluated by comparing the predicted results with those obtained from field experiments. The modeling efficiency was greater than 98% and the root mean square error did not exceed 1.68 cm for both soils with good agreement.

Soil-wetting front in surface and subsurface drip irrigation

2013 ◽  
Vol 166 (5) ◽  
pp. 272-284 ◽  
Author(s):  
Mohammad Sadegh Monjezi ◽  
Hamed Ebrahimian ◽  
Abdolmajid Liaghat ◽  
Mohammad Amin Moradi
Keyword(s):  
Drip Irrigation ◽  
Subsurface Drip Irrigation ◽  
Wetting Front ◽  
Soil Wetting ◽  
Subsurface Drip
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