Engineered Barrier Testing at the INEEL Engineered Barriers Test Facility: FY-1997 and FY-1999

PDF Version Also Available for Download.

Description

Engineered barriers of two designs are being tested at the Engineered Barriers Test Facility (EBTF) at the Idaho National Engineering and Environmental Laboratory. This report describes the test facility, barrier designs, and instruments used to monitor the test plots. Wetting tests conducted on the test plots in FY-97 are described and data collected from monitoring the test plots before, during and after the wetting tests are used to evaluate the performance of the covers during FY-97 and FY-98. Replicates of two engineered barrier designs were constructed in the EBTF cells. The first design comprises a thick, vegetated soil cover. The ... continued below

Physical Description

70 Pages

Creation Information

Keck, K. N. & Porro, I. September 1, 1998.

Context

This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this report can be viewed below.

Who

People and organizations associated with either the creation of this report or its content.

Sponsor

Publisher

Provided By

UNT Libraries Government Documents Department

Serving as both a federal and a state depository library, the UNT Libraries Government Documents Department maintains millions of items in a variety of formats. The department is a member of the FDLP Content Partnerships Program and an Affiliated Archive of the National Archives.

Contact Us

What

Descriptive information to help identify this report. Follow the links below to find similar items on the Digital Library.

Description

Engineered barriers of two designs are being tested at the Engineered Barriers Test Facility (EBTF) at the Idaho National Engineering and Environmental Laboratory. This report describes the test facility, barrier designs, and instruments used to monitor the test plots. Wetting tests conducted on the test plots in FY-97 are described and data collected from monitoring the test plots before, during and after the wetting tests are used to evaluate the performance of the covers during FY-97 and FY-98. Replicates of two engineered barrier designs were constructed in the EBTF cells. The first design comprises a thick, vegetated soil cover. The second design incorporates a capillary/biobarrier within the vegtated soil cover. The capillary barrier uses the textural break between an upper, fine textured soil and a lower, coarser-textured gravel layer to inhibit drainage under unsaturated conditions while increasing soil moisture storage in the root zone. Evaporation and transpiration by plants (although the test plots have not yet been vegetated) are used to recycle water stored in the soil back to the atmosphere. A geotextile fabric is used to maintain separation of the soil and gravel layers. A thick layer of cobbles beneath the gravel layer serves as a biobarrier to prevent intrusion of plant roots and burrowing animals into underlying waste (there is no waste in the test plots). Each test plot was instrumented with time domain reflectometry probes and neutron probe access tubes to measure moisture contents, tensiometers, heat dissipation sensors, and thermocouple psychrometers to measure matric potentials, thermocouples to measure soil temperature, and ion-exchange resin beads to monitor tracer movement. Each drainage sump is equipped with a tipping bucket instrument and pressure transducer to measure drainage. Precipitation is measured using a heated rain gauge located at the EBTF. Instrument calibration equation coefficients are presented, and data reduction techniques are described. The wetting tests were designed to stress the test plots to the maximum by forcing drainage to occur. Drainage generally occurred two to three days following the start of the wetting test. Drainage from the capillary/biobarrier test plots stopped sooner than drainage from the thick soil test plots. Similar results were observed in drainage data collected in FY-98 following the spring thaw. Drainage from the capillary/biobarrier test plots following the winter of 1998 represents about one-third of the precipitation occurring during that period compared to two-thirds of the precipitation from the thick soil test plots. By limiting drainage, the capillary/biobarriers increased water storage in the upper portions of the test plots compared to the thick soil barriers. The data evaluated in this report come from an ongoing project. The aftereffects of the wetting tests continue to be monitored. Long-term monitoring under ambient conditions, the application of additional treatments to the test plots, and numerical modeling are planned for the future.

Physical Description

70 Pages

Language

Item Type

Identifier

Unique identifying numbers for this report in the Digital Library or other systems.

  • Other: DE00005163
  • Report No.: INEEL/EXT-98-00964
  • Grant Number: AC07-94ID13223
  • DOI: 10.2172/5163 | External Link
  • Office of Scientific & Technical Information Report Number: 5163
  • Archival Resource Key: ark:/67531/metadc697746

Collections

This report is part of the following collection of related materials.

Office of Scientific & Technical Information Technical Reports

What responsibilities do I have when using this report?

When

Dates and time periods associated with this report.

Creation Date

  • September 1, 1998

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

Description Last Updated

  • Feb. 16, 2017, 6:38 p.m.

Usage Statistics

When was this report last used?

Yesterday: 0
Past 30 days: 0
Total Uses: 5

Interact With This Report

Here are some suggestions for what to do next.

Start Reading

PDF Version Also Available for Download.

Citations, Rights, Re-Use

Keck, K. N. & Porro, I. Engineered Barrier Testing at the INEEL Engineered Barriers Test Facility: FY-1997 and FY-1999, report, September 1, 1998; Idaho Falls, Idaho. (digital.library.unt.edu/ark:/67531/metadc697746/: accessed August 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.