Performance Evaluation of Four Models for Estimating the Capillary Rise in Wheat Crop Root Zone Considering Shallow Water Table

2020 ◽  
pp. 423-434
Author(s):  
Arunava Poddar ◽  
Navsal Kumar ◽  
Vijay Shankar
Keyword(s):  
Performance Evaluation ◽  
Shallow Water ◽  
Water Table ◽  
Root Zone ◽  
Capillary Rise ◽  
Wheat Crop ◽  
Shallow Water Table ◽  
Crop Root

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

Increased denitrification below the root zone in the fall following a spring manure application

1997 ◽  
Vol 77 (2) ◽  
pp. 249-251 ◽  
Author(s):  
J. W. Paul ◽  
V. Etches ◽  
B. J. Zebarth
Keyword(s):  
Dairy Cattle ◽  
Shallow Water ◽  
Key Words ◽  
Water Table ◽  
Soil Profile ◽  
Root Zone ◽  
Cattle Slurry ◽  
Shallow Water Table ◽  
Indirect Measurements ◽  
Dairy Cattle Slurry

Indirect measurements of denitrification to 120 cm depth in a coarse textured soil in October showed higher denitrification rates following a single spring application of dairy cattle slurry than following a spring application of fertilizer. The highest denitrification rates occurred immediately above and below the water table (90 cm depth) and resulted primarily from C applied in the manure moving down through the soil profile. Key words: Dairy cattle slurry, carbon, nitrate, shallow water table

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.

scholarly journals Quantification of capillary water input to the root zone from shallow water table and determination of the associated ‘Bartlett’ pear water status

2021 ◽  
pp. 227-234
Author(s):  
M.L. Mañueco ◽  
A.B. Rodríguez ◽  
A. Montenegro ◽  
J. Galeazzi ◽  
D. Del Brio ◽  
...  
Keyword(s):  
Shallow Water ◽  
Water Table ◽  
Root Zone ◽  
Water Status ◽  
Capillary Water ◽  
Shallow Water Table

Sustainable Root Zone Salinity and Shallow Water Table in the Context of Land Retirement

2010 ◽  
Vol 136 (5) ◽  
pp. 289-299 ◽  
Author(s):  
Purnendu N. Singh ◽  
Wesley W. Wallender ◽  
Marco P. Maneta ◽  
Stephen L. Lee ◽  
Beatrice A. Olsen
Keyword(s):  
Shallow Water ◽  
Water Table ◽  
Root Zone ◽  
Shallow Water Table ◽  
Land Retirement ◽  
Root Zone Salinity

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

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
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