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Related Experiment Videos

Estimating bulk density in vertically exposed stoney alluvium using a modified excavation method.

K R Brye1, T L Morris, D M Miller

  • 1Department of Crop, Soil, and Environmental Sciences, University of Arkansas, 115 Plant Sciences Building, Fayetteville, AR 72701, USA. kbrye@uark.edu

Journal of Environmental Quality
|September 10, 2004
PubMed
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A new field method accurately estimates stream bank soil density, crucial for calculating sediment loads. This technique helps assess water quality impacts from erosion, aiding in total maximum daily load (TMDL) management.

Area of Science:

  • Environmental Science
  • Geomorphology
  • Soil Science

Background:

  • Accelerated stream bank erosion is a persistent issue in the U.S., leading to increased sediment loads and reduced water quality.
  • Growing numbers of water bodies impaired by sediment necessitate accurate methods for estimating sediment loading rates.
  • Existing methods may not adequately address the complexities of eroding stream banks with high coarse-fragment content.

Purpose of the Study:

  • To evaluate the efficacy of the excavation/polyurethane-foam technique for estimating bulk density in vertically exposed alluvium with high coarse-fragment content.
  • To provide a simple, in situ field method for assessing stream bank erodibility.
  • To facilitate more accurate calculations of sediment loading rates for riverine systems.

Main Methods:

Related Experiment Videos

  • Application of the excavation/polyurethane-foam technique to vertically exposed alluvial stream bank deposits.
  • Focus on deposits characterized by high coarse-fragment content (greater than 70%).
  • Measurement of both total bulk density and soil (<2-mm size fraction) bulk density.

Main Results:

  • The excavation/polyurethane-foam technique provided reasonably accurate estimates of total and soil bulk density.
  • The method proved effective even in vertically exposed alluvium with high coarse-fragment content, a novel application.
  • Successful estimation of bulk density was achieved for eroding stream bank materials.

Conclusions:

  • The excavation/polyurethane-foam technique is a viable and accurate in situ method for estimating bulk density of eroding stream banks with high coarse-fragment content.
  • This method supports the calculation of sediment loading rates using field data, crucial for water quality management.
  • The findings contribute to improved understanding and management of sediment transport in riverine systems.