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Groundwater investigations and canal seepage studies. Progress report no. 2, special research project no. 102 Item Info

Progress in 1966 on Special Research Project 102 of the University of Idaho Engineering Experiment Station in cooperation with the Bureau of Reclamation and the Agricultural Research Service ARS is presented. Average seepage rates from 86 seepage meter tests with the ARS meter are compared with ponding rates and inflow-outflow loss measurements. The average seepage meter rates are 23 percent higher than ponded rates. A method for determining the required number of seepage meter tests is outlined. Seasonal variation of soil moisture tension in the soil prism beneath an operating canal are measured, using two methods of tensiometer installation and readout. Increases in soil moisture tension from 0 to 5. 5 feet of water over the irrigation season is indicative of the gradual sealing of the canal bottom and corresponding decreases in seepage rates. Field and laboratory conductivity measurements indicate the impeding layer in the canal bottom has a saturated hydraulic conductivity of about 1/50 that of the natural soil beneath the layel"" at the end of the irrigation season. A new method for securing and testing undisturbed soil cores using shrinkable plastic tubing is outlined. Good agreement between field estimates of the conductivity of the impeding layer and laboratory tests was achieved,

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Title:
Groundwater investigations and canal seepage studies. Progress report no. 2, special research project no. 102
Authors:
Brockway, C. E.; Worstell, R. V.
Date Created (ISO Standard):
1967-06
Description:
Progress in 1966 on Special Research Project 102 of the University of Idaho Engineering Experiment Station in cooperation with the Bureau of Reclamation and the Agricultural Research Service ARS is presented. Average seepage rates from 86 seepage meter tests with the ARS meter are compared with ponding rates and inflow-outflow loss measurements. The average seepage meter rates are 23 percent higher than ponded rates. A method for determining the required number of seepage meter tests is outlined. Seasonal variation of soil moisture tension in the soil prism beneath an operating canal are measured, using two methods of tensiometer installation and readout. Increases in soil moisture tension from 0 to 5. 5 feet of water over the irrigation season is indicative of the gradual sealing of the canal bottom and corresponding decreases in seepage rates. Field and laboratory conductivity measurements indicate the impeding layer in the canal bottom has a saturated hydraulic conductivity of about 1/50 that of the natural soil beneath the layel" at the end of the irrigation season. A new method for securing and testing undisturbed soil cores using shrinkable plastic tubing is outlined. Good agreement between field estimates of the conductivity of the impeding layer and laboratory tests was achieved,
Subjects:
canal seepage unsaturated flow hydraulic gradient
Location:
Paul
Latitude:
42.6
Longitude:
-113.78
Collection:
IWRRI
IWRRI number:
196701
Rights:
Rights to the digital resource are held by the University of Idaho. http://www.uidaho.edu/
Publisher:
University of Idaho
Contributing Institution:
University of Idaho
Type:
Text
Format:
application/pdf
Cataloger:
wbv
Date Digitized:
2012

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Source
Preferred Citation:
"Groundwater investigations and canal seepage studies. Progress report no. 2, special research project no. 102", Idaho Waters Digital Library, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/iwdl/items/iwdl-196701.html
Rights
Rights:
Rights to the digital resource are held by the University of Idaho. http://www.uidaho.edu/
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