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Line-Source Field Dripper for the Measurement of in situ Unsaturated Hydraulic Conductivity Function


Affiliations
1 ICAR-Central Soil Salinity Research Institute, Regional Research Station, Lucknow 226 002, India
2 Vaugh Institute of Agricultural Engineering and Technology, Sam Higginbottom University of Agriculture, Technology and Sciences, Allahabad 211 007, India
 

A line-source field dripper method based on steadystate solution of water flow from line-source water flow geometry is proposed for measuring unsaturated hydraulic conductivity function of the soil. The saturated hydraulic conductivity values obtained by linesource method were lower than those obtained by point-source field dripper method of Wooding and higher than the values obtained by inverse auger hole, constant head permeameter and infiltrometer methods for cultivated recently tilled normal soil, cultivated untilled normal soil, cultivated recently tilled sodic soil and uncultivated untilled sodic soil. The method is more reliable as it covers large soil volume.

Keywords

Field Dripper, Infiltrometer, Line Source Method, Normal And Sodic Soil, Saturated And Unsaturated Hydraulic Conductivity.
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  • Line-Source Field Dripper for the Measurement of in situ Unsaturated Hydraulic Conductivity Function

Abstract Views: 351  |  PDF Views: 128

Authors

Rohit Pratap Ojha
ICAR-Central Soil Salinity Research Institute, Regional Research Station, Lucknow 226 002, India
Chhedi Lal Verma
ICAR-Central Soil Salinity Research Institute, Regional Research Station, Lucknow 226 002, India
Derrick M. Denis
Vaugh Institute of Agricultural Engineering and Technology, Sam Higginbottom University of Agriculture, Technology and Sciences, Allahabad 211 007, India
Sanjay Arora
ICAR-Central Soil Salinity Research Institute, Regional Research Station, Lucknow 226 002, India

Abstract


A line-source field dripper method based on steadystate solution of water flow from line-source water flow geometry is proposed for measuring unsaturated hydraulic conductivity function of the soil. The saturated hydraulic conductivity values obtained by linesource method were lower than those obtained by point-source field dripper method of Wooding and higher than the values obtained by inverse auger hole, constant head permeameter and infiltrometer methods for cultivated recently tilled normal soil, cultivated untilled normal soil, cultivated recently tilled sodic soil and uncultivated untilled sodic soil. The method is more reliable as it covers large soil volume.

Keywords


Field Dripper, Infiltrometer, Line Source Method, Normal And Sodic Soil, Saturated And Unsaturated Hydraulic Conductivity.

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DOI: https://doi.org/10.18520/cs%2Fv118%2Fi12%2F1984-1990