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Movement of water from canals to groundwater table; Research technical completion report project A-009-IDA Item Info

Investigation of the mechanics of water movement from irrigation canals to the water table has been performed on selected canals in southern Idaho. Field studies of existing seepage measurement techniques including ponding tests, inflow-outflow techniques and seepage meters were made. A new seepage meter which will operate efficiently in large operating canals was developed. An accurate and reliable tensiometer system for monitoring changes in soil moisture pressure beneath operating canals was developed. Measured decreases in soil moisture and pressure beneath an operating canal during the irrigation season indicated decreasing seepage rates caused by natural sealing of a thin soil layer on the canal bottom. A fast response, inexpensive null point tensiometer was laboratory tested and a device for measuring the capillary pressure - saturation curve for soils in situ was investigated. New techniques for obtaining and testing undisturbed soil cores using heat shrinkable tubing allow efficient laboratory determination of hydraulic characteristics.

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Title:
Movement of water from canals to groundwater table; Research technical completion report project A-009-IDA
Authors:
Brockway, Charles E.; Bloomsburg, G. L.
Date Created (ISO Standard):
1968-09
Description:
Investigation of the mechanics of water movement from irrigation canals to the water table has been performed on selected canals in southern Idaho. Field studies of existing seepage measurement techniques including ponding tests, inflow-outflow techniques and seepage meters were made. A new seepage meter which will operate efficiently in large operating canals was developed. An accurate and reliable tensiometer system for monitoring changes in soil moisture pressure beneath operating canals was developed. Measured decreases in soil moisture and pressure beneath an operating canal during the irrigation season indicated decreasing seepage rates caused by natural sealing of a thin soil layer on the canal bottom. A fast response, inexpensive null point tensiometer was laboratory tested and a device for measuring the capillary pressure - saturation curve for soils in situ was investigated. New techniques for obtaining and testing undisturbed soil cores using heat shrinkable tubing allow efficient laboratory determination of hydraulic characteristics.
Subjects:
groundwater movement percolation seepage soil water
Series:
Water for Idaho
IWRRI number:
196802
Rights:
In copyright, educational use permitted. Educational use includes non-commercial reproduction of text and images in materials for teaching and research purposes. For other contexts beyond fair use, including digital reproduction, please contact the University of Idaho Library Special Collections and Archives Department at libspec@uidaho.edu. The University of Idaho Library is not liable for any violations of the law by users.
Publisher:
Water Resources Research Institute, University of Idaho
Contributing Institution:
University of Idaho
Type:
Text
Format:
application/pdf
Cataloger:
Jodi Haire
Date Digitized:
2008-01-25

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Preferred Citation:
"Movement of water from canals to groundwater table; Research technical completion report project A-009-IDA", Idaho Waters Digital Library, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/iwdl/items/iwdl-196802.html
Rights
Rights:
In copyright, educational use permitted. Educational use includes non-commercial reproduction of text and images in materials for teaching and research purposes. For other contexts beyond fair use, including digital reproduction, please contact the University of Idaho Library Special Collections and Archives Department at libspec@uidaho.edu. The University of Idaho Library is not liable for any violations of the law by users.
Standardized Rights:
http://rightsstatements.org/vocab/InC-EDU/1.0/
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