MEASURING HYDRAULIC CONDUCTIVITY IN A CRACKING CLAY SOIL USING THE GUELPH PERMEAMETER

1999 ◽  
Vol 42 (4) ◽  
pp. 957-964 ◽  
Author(s):  
V. Bagarello ◽  
M. Iovino ◽  
W. D. Reynolds
Keyword(s):  
Hydraulic Conductivity ◽  
Clay Soil ◽  
Guelph Permeameter

scholarly journals Reductions in root hydraulic conductivity in response to clay soil and treated waste water are related to PIPs down-regulation in Citrus

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Indira Paudel ◽  
Shabtai Cohen ◽  
Lyudmila Shlizerman ◽  
Amit K. Jaiswal ◽  
Avi Shaviv ◽  
...  
Keyword(s):  
Waste Water ◽  
Hydraulic Conductivity ◽  
Clay Soil ◽  
Down Regulation ◽  
Root Hydraulic Conductivity

COMPACTION EFFECTS ON THE HYDRAULIC CONDUCTIVITY OF A CLAY SOIL

Soil Science ◽  
1978 ◽  
Vol 125 (5) ◽  
pp. 278-282 ◽  
Author(s):  
ESTHER DOUGLAS ◽  
EDWARD McKYES
Keyword(s):  
Hydraulic Conductivity ◽  
Clay Soil

Physical changes in seedbed material resulting from the application of dissolved gypsum

Soil Research ◽  
1966 ◽  
Vol 4 (1) ◽  
pp. 69 ◽  
Author(s):  
DR Scotter ◽  
J Loveday
Keyword(s):  
Hydraulic Conductivity ◽  
Water Retention ◽  
Clay Soil ◽  
Physical Changes

The effect of an initial irrigation of gypsum solution, as compared with water, on water retention and transmission in a seedbed loam and clay and the subsequent changes in porosity during drying have been studied. A marked increase in hydraulic conductivity, particularly in the clay soil, and concomitant increases in total and air-filled porosity at all matric potentials, from near saturation to oven dry, were measured. The data provide an explanation of the earlier observation that improved emergence resulting from gypsum treatment was associated with the maintenance of higher matric potentials in the surface 4 in. of soil for longer periods after irrigation.

A plot-scale uncertainty analysis of saturated hydraulic conductivity of a clay soil

2020 ◽  
pp. 125694
Author(s):  
Vincenzo Bagarello ◽  
Emanuele Barca ◽  
Mirko Castellini ◽  
Massimo Iovino ◽  
Renato Morbidelli ◽  
...  
Keyword(s):  
Hydraulic Conductivity ◽  
Uncertainty Analysis ◽  
Clay Soil ◽  
Saturated Hydraulic Conductivity ◽  
Scale Uncertainty

scholarly journals Use of Molasses and Distillery Slops with Sulfur for the Reclamation of a Saline-Sodic and a Sodic Soil from Puerto Rico

1969 ◽  
Vol 51 (1) ◽  
pp. 55-65
Author(s):  
Raúl Pérez Escolar
Keyword(s):  
Puerto Rico ◽  
Hydraulic Conductivity ◽  
Clay Soil ◽  
Crop Yields ◽  
Water Movement ◽  
Soil Column ◽  
Exchangeable Sodium ◽  
Sodic Soil ◽  
Corn Crop ◽  
Ca Ions

Data are presented on the effects of the use of molasses and distillery slops in conjunction with sulfur for the reclamation of a saline-sodic and a sodic soil from southwestern Puerto Rico. Results show that, in a sodic Guánica clay soil, corn yields were higher under the molasses treatment in the first corn crop, sulfur-slops and sulfur molasses in the second corn crop, and molasses, sulfur-slops, and sulfur molasses in the third crop, namely, snapbeans. Hydraulic conductivity values were markedly increased in the sulfur-slops and sulfur molasses treatments and removal of harmful exchangeable sodium was possible throughout the three crops. This was probably because of better water movement and the fact that more Ca ions were brought into circulation to displace adsorbed sodium. The experiments conducted on the saline-sodic Fe (Faith) clay soil followed about the same pattern of crop yields, hydraulic conductivity, and removal of exchangeable sodium of the Guánica clay soil. On the check plots, however, replacement of adsorbed sodium was rather pronounced for several possible reasons. These are: The soil had excess soluble salts which, for some time at least, maintained the colloids in a flocculated state. The soil column was rather short, 6 inches, and the hydrolysis of fertilizer salts must have brought into circulation Ca ions in an amount such as to replace considerable adsorbed sodium. Since Thiobacillus thiooxidans derives its energy from the oxidation of sulfur alone it is believed that the enhanced oxidation of sulfur must have been caused by created aeration and somewhat acid conditions which favored the bacteria.

AN EVALUATION OF THE GUELPH PERMEAMETER FOR MEASURING SATURATED HYDRAULIC CONDUCTIVITY

1990 ◽  
Vol 33 (4) ◽  
pp. 1179-1184 ◽  
Author(s):  
J. Gallichand ◽  
C. A. Madramootoo ◽  
P. Emight ◽  
S. F. Barrington
Keyword(s):  
Hydraulic Conductivity ◽  
Saturated Hydraulic Conductivity ◽  
Guelph Permeameter

scholarly journals CONDUTIVIDADE HIDRÁULICA DO SOLO SATURADO NA ZONA VADOSA IN SITU E EM LABORATÓRIO

Irriga ◽  
2009 ◽  
Vol 14 (3) ◽  
pp. 413-422
Author(s):  
Rodrigo Trevisan ◽  
Luiz Felipe Salemi ◽  
Jorge Marcus de Moraes ◽  
Julio Cesar Martins de Oliveira
Keyword(s):  
Hydraulic Conductivity ◽  
Sao Paulo ◽  
Laboratory Method ◽  
Saturated Hydraulic Conductivity ◽  
Fundamental Parameter ◽  
São Paulo ◽  
Advantages And Disadvantages ◽  
Constant Head ◽  
Guelph Permeameter

 CONDUTIVIDADE HIDRÁULICA DO SOLO SATURADO NA ZONA VADOSA IN SITU E EM LABORATÓRIO  Rodrigo Trevisan1; Luiz Felippe Salemi1;  Jorge Marcos de Moraes1;  Júlio Cesar Martins de Oliveira(4)(1)Laboratório de Ecologia Isotópica, Centro de Energia Nuclear na Agricultura, Universidade de São Paulo, Piracicaba, SP,  e-mail: [email protected] (4)Laboratório de Física de Solos, Centro de Energia Nuclear na Agricultura, Universidade de São Paulo, Piracicaba, SP  1 RESUMO A condutividade hidráulica do solo é uma propriedade fundamental na determinação da dinâmica da água e de solutos em solos saturados e não - saturados, sendo útil na resolução de problemas relacionados à preservação do meio ambiente, da agricultura e dos recursos hídricos. Muitos métodos são empregados para a sua determinação em solos saturados, tanto em campo como em laboratório, cada um com suas vantagens e desvantagens. Nesse contexto, o objetivo do presente trabalho foi o de comparar um método de campo, o método do permeâmetro de carga constante (“Permeâmetro Guelph”), e um método de laboratório, também de carga constante usando amostras indeformadas de solo, em um solo classificado como Latossolo Vermelho Escuro, da região de Piracicaba - SP. Conclui-se que o método de campo e o método de laboratório não podem ser considerados diferentes. UNITERMOS: permeabilidade; zona não saturada; latossolo; permeâmetro guelph.  TREVISAN, R.; SALEMI, L. F.; MORAES, J. M.; OLIVEIRA, J. C. M. THE SATURATED HYDRAULIC CONDUCTIVITY IN THE VADOSE ZONE IN SITU AND IN LABORATORY  2 ABSTRACT The saturated hydraulic conductivity of the soil is a fundamental parameter to determine  water and solutes dynamics in the soil, and it is useful  to resolve problems related to environmental, agricultural and water resources preservation. Many methods are used for its determination, in field and in the laboratory, each one with its advantages and disadvantages. The main objective of the present work was to compare a field method, using a constant head permeameter (“Guelph Permeameter”), to a laboratory method also employing a constant head in undisturbed samples in a soil classified as dark red Latosol (Oxisol) in the area ofPiracicaba. The results show, through statistical analysis, that the values obtained by the field and laboratory methods cannot be considered different. KEYWORDS: permeability; unsaturated zone; oxisol;guelph permeameter.

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