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Title: Hydraulic Conductivity Measurements Barrow 2014

Abstract

Six individual ice cores were collected from Barrow Environmental Observatory in Barrow, Alaska, in May of 2013 as part of the Next Generation Ecosystem Experiment (NGEE). Each core was drilled from a different location at varying depths. A few days after drilling, the cores were stored in coolers packed with dry ice and flown to Lawrence Berkeley National Laboratory (LBNL) in Berkeley, CA. 3-dimensional images of the cores were constructed using a medical X-ray computed tomography (CT) scanner at 120kV. Hydraulic conductivity samples were extracted from these cores at LBNL Richmond Field Station in Richmond, CA, in February 2014 by cutting 5 to 8 inch segments using a chop saw. Samples were packed individually and stored at freezing temperatures to minimize any changes in structure or loss of ice content prior to analysis. Hydraulic conductivity was determined through falling head tests using a permeameter [ELE International, Model #: K-770B]. After approximately 12 hours of thaw, initial falling head tests were performed. Two to four measurements were collected on each sample and collection stopped when the applied head load exceeded 25% change from the original load. Analyses were performed between 2 to 3 times for each sample. The final hydraulic conductivitymore » calculations were computed using methodology of Das et al., 1985.« less

Authors:
; ; ;
Publication Date:
Research Org.:
Next Generation Ecosystems Experiment - Arctic, Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (US)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
Contributing Org.:
PNL, BNL,ANL,ORNL
OSTI Identifier:
1170518
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Data
Data Type:
Numeric Data
Country of Publication:
United States
Availability:
ORNL
Language:
English
Subject:
54 Environmental Sciences; ngee; ngee-arctic; Hydraulic Conductivity; Hydrology; Falling Head Test

Citation Formats

Katie McKnight, Tim Kneafsey, Craig Ulrich, and Jil Geller. Hydraulic Conductivity Measurements Barrow 2014. United States: N. p., 2015. Web. doi:10.5440/1170518.
Katie McKnight, Tim Kneafsey, Craig Ulrich, & Jil Geller. Hydraulic Conductivity Measurements Barrow 2014. United States. doi:10.5440/1170518.
Katie McKnight, Tim Kneafsey, Craig Ulrich, and Jil Geller. Sun . "Hydraulic Conductivity Measurements Barrow 2014". United States. doi:10.5440/1170518. https://www.osti.gov/servlets/purl/1170518.
@article{osti_1170518,
title = {Hydraulic Conductivity Measurements Barrow 2014},
author = {Katie McKnight and Tim Kneafsey and Craig Ulrich and Jil Geller},
abstractNote = {Six individual ice cores were collected from Barrow Environmental Observatory in Barrow, Alaska, in May of 2013 as part of the Next Generation Ecosystem Experiment (NGEE). Each core was drilled from a different location at varying depths. A few days after drilling, the cores were stored in coolers packed with dry ice and flown to Lawrence Berkeley National Laboratory (LBNL) in Berkeley, CA. 3-dimensional images of the cores were constructed using a medical X-ray computed tomography (CT) scanner at 120kV. Hydraulic conductivity samples were extracted from these cores at LBNL Richmond Field Station in Richmond, CA, in February 2014 by cutting 5 to 8 inch segments using a chop saw. Samples were packed individually and stored at freezing temperatures to minimize any changes in structure or loss of ice content prior to analysis. Hydraulic conductivity was determined through falling head tests using a permeameter [ELE International, Model #: K-770B]. After approximately 12 hours of thaw, initial falling head tests were performed. Two to four measurements were collected on each sample and collection stopped when the applied head load exceeded 25% change from the original load. Analyses were performed between 2 to 3 times for each sample. The final hydraulic conductivity calculations were computed using methodology of Das et al., 1985.},
doi = {10.5440/1170518},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Feb 22 00:00:00 EST 2015},
month = {Sun Feb 22 00:00:00 EST 2015}
}

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