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Response of Well-Water Elevations and Spring Discharge to Changes in Barometric Pressure, Eastern Snake River Plain Aquifer, Hagerman, Idaho Item Info

The effect of barometric pressure change on well-water levels was identified in four wells penetrating the Eastern Snake River Plain [ESRP] aquifer between Milner Dam and King Hill, Idaho. Removal of barometric effects on well-water elevations allows measurement of external stresses [such as changes in drawdown during aquifer tests] that could be obscured by well-water fluctuations caused by barometric pressure changes. Multiple-regression deconvolution reveals that the wells penetrate confined aquifers and that well-water levels in one well are affected by wellbore storage or skin effects. Application of a simple linear regression model between barometric pressure and spring discharge at National Fish Hatchery #15, Blind Canyon Springs, and Sand Springs suggests that changes in spring discharge may be independent of barometric pressure. Alternatively, changes in spring discharge are less than the precision of the instruments measuring discharge. Because the hydraulic gradient in parts of the ESRP aquifer is as low as 1 ft per mile [0.0002 ft/ft], the addition of atmospheric head to elevation head should be further evaluated. The use of total head [elevation head plus the atmospheric head component] may increase the accuracy of the hydraulic gradient and change the inferred direction of groundwater flow in parts of the ESRP aquifer.

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Title:
Response of Well-Water Elevations and Spring Discharge to Changes in Barometric Pressure, Eastern Snake River Plain Aquifer, Hagerman, Idaho
Authors:
Rush, James D.; Johnson, Gary S.
Date Created (ISO Standard):
2002-11
Description:
The effect of barometric pressure change on well-water levels was identified in four wells penetrating the Eastern Snake River Plain [ESRP] aquifer between Milner Dam and King Hill, Idaho. Removal of barometric effects on well-water elevations allows measurement of external stresses [such as changes in drawdown during aquifer tests] that could be obscured by well-water fluctuations caused by barometric pressure changes. Multiple-regression deconvolution reveals that the wells penetrate confined aquifers and that well-water levels in one well are affected by wellbore storage or skin effects. Application of a simple linear regression model between barometric pressure and spring discharge at National Fish Hatchery #15, Blind Canyon Springs, and Sand Springs suggests that changes in spring discharge may be independent of barometric pressure. Alternatively, changes in spring discharge are less than the precision of the instruments measuring discharge. Because the hydraulic gradient in parts of the ESRP aquifer is as low as 1 ft per mile [0.0002 ft/ft], the addition of atmospheric head to elevation head should be further evaluated. The use of total head [elevation head plus the atmospheric head component] may increase the accuracy of the hydraulic gradient and change the inferred direction of groundwater flow in parts of the ESRP aquifer.
Subjects:
hydraulic gradient groundwater flow water table fluctuations
Location:
Hagerman
Latitude:
42.81
Longitude:
-114.89
Collection:
IWRRI
IWRRI number:
200205
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:
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:
"Response of Well-Water Elevations and Spring Discharge to Changes in Barometric Pressure, Eastern Snake River Plain Aquifer, Hagerman, Idaho", Idaho Waters Digital Library, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/iwdl/items/iwdl-200205.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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