scholarly journals Models for estimating capillary rise in a heavy clay soil with a saline shallow water table

1992 ◽  
Vol 13 (1) ◽  
Author(s):  
S.A. Prathapar ◽  
C.W. Robbins ◽  
W.S. Meyer ◽  
N.S. Jayawardane
Keyword(s):  
Shallow Water ◽  
Water Table ◽  
Clay Soil ◽  
Capillary Rise ◽  
Shallow Water Table ◽  
Heavy Clay

scholarly journals Results of a ground water level experimental field with arable crops on clay soil.

1958 ◽  
Vol 6 (1) ◽  
pp. 1-10 ◽  
Author(s):  
J.W. Van Hoorn
Keyword(s):  
Surface Layer ◽  
Shallow Water ◽  
Water Table ◽  
Root Development ◽  
Groundwater Level ◽  
Clay Soil ◽  
Shallow Water Table ◽  
Short Supply ◽  
Arable Crops ◽  
Heavy Clay

On a heavy clay soil with large moisture-retaining capacity, aeration and root development are reduced by a shallow water table, and therefore plant nutrients, in particular N, are in short supply. The effect of the depth of the water table on yield is mainly determined by the different effects of N on crops and by the level of N dressings. The depression in yield caused by a shallow water table can be compensated for by increasing the N dressing. When the water table is shallow there is a decrease in the percentage of large pores and permeability. If the groundwater level is kept at 40 cm throughout the year, the structure of the surface layer deteriorates and tillage becomes difficult. (Abstract retrieved from CAB Abstracts by CABI’s permission)

scholarly journals A field experiment concerning capillary rise of moisture in a heavy clay soil.

1955 ◽  
Vol 3 (1) ◽  
pp. 60-69
Author(s):  
G.P. Wind
Keyword(s):  
Water Balance ◽  
Field Experiment ◽  
Water Table ◽  
Clay Soil ◽  
Capillary Rise ◽  
Moisture Movement ◽  
Moisture Flow ◽  
Heavy Clay ◽  
The Law ◽  
The Relationship

The rate of capillary rise of moisture in a heavy clay soil was calculated by means of a water balance. This moisture movement supplied about 150 mm in 1953. Under favourable circumstances, a delivery of 3-4 mm per day is possible. The calculated values appeared to be in conformity with the law of unsaturated moisture flow. A graph gives the relationship between height above the water table, pF and capillary rise. (Abstract retrieved from CAB Abstracts by CABI’s permission)

scholarly journals Simulation of upward flux from shallow water-table using UPFLOW model

2013 ◽  
Vol 3 ◽  
pp. 123-127
Author(s):  
M.H. Ali ◽  
I. Abustan ◽  
S. Islam
Keyword(s):  
Shallow Water ◽  
Water Table ◽  
Capillary Rise ◽  
Coefficient Of Determination ◽  
Reliable Estimate ◽  
Graphical Display ◽  
Upward Movement ◽  
Irrigation Requirement ◽  
Shallow Water Table ◽  
Upward Flux

The upward movement of water by capillary rise from shallow water-table to the root zone is an important incoming flux. For determining exact amount of irrigation requirement, estimation of capillary flux or upward flux is essential. Simulation model can provide a reliable estimate of upward flux under variable soil and climatic conditions. In this study, the performance of model UPFLOW to estimate upward flux was evaluated. Evaluation of model performance was performed with both graphical display and statistical criteria. In distribution of simulated capillary rise values against observed field data, maximum data points lie around the 1:1 line, which means that the model output is reliable and reasonable. The coefficient of determination between observed and simulated values was 0.806 (r = 0.93), which indicates a good inter-relation between observed and simulated values. The relative error, model efficiency, and index of agreement were found as 27.91%, 85.93% and 0.96, respectively. Considering the graphical display of observed and simulated upward flux and statistical indicators, it can be concluded that the overall performance of the UPFLOW model in simulating actual upward flux from a crop field under variable water-table condition is satisfactory. Thus, the model can be used to estimate capillary rise from shallow water-table for proper estimation of irrigation requirement, which would save valuable water from over-irrigation.

Shallow Water Table Fluctuations in Relation to Soil Penetration Resistance

Ground Water ◽  
2003 ◽  
Vol 41 (7) ◽  
pp. 964-972 ◽  
Author(s):  
James B. Shanley ◽  
K. Niclas Hjerdt ◽  
Jeffrey J. McDonnell ◽  
Carol Kendall
Keyword(s):  
Shallow Water ◽  
Water Table ◽  
Penetration Resistance ◽  
Shallow Water Table ◽  
Water Table Fluctuations ◽  
Soil Penetration Resistance

Development and application of long-term root zone salt balance model for predicting soil salinity in arid shallow water table area

2019 ◽  
Vol 213 ◽  
pp. 486-498 ◽  
Author(s):  
Guanfang Sun ◽  
Yan Zhu ◽  
Ming Ye ◽  
Jinzhong Yang ◽  
Zhongyi Qu ◽  
...  
Keyword(s):  
Shallow Water ◽  
Water Table ◽  
Soil Salinity ◽  
Root Zone ◽  
Balance Model ◽  
Salt Balance ◽  
Shallow Water Table

Analysis of the contribution of groundwater to evapotranspiration in an arid irrigation district with shallow water table

2016 ◽  
Vol 171 ◽  
pp. 131-141 ◽  
Author(s):  
Zhongyi Liu ◽  
Hang Chen ◽  
Zailin Huo ◽  
Fengxin Wang ◽  
Clinton C. Shock
Keyword(s):  
Shallow Water ◽  
Water Table ◽  
Irrigation District ◽  
Shallow Water Table
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