Vadose Zone Transport Field Study: FY 2002 Status Report

Ward, Anderson L. ; Gee, Glendon W. ; Zhang, Z. F. ; Keller, Jason M.

Pacific Northwest National Laboratory (U.S.)

关键词: Sediments;    Anisotropy;    Simulation;    Soils;    Contamination;   

DOI  :  10.2172/978552
RP-ID  :  PNNL-14150
RP-ID  :  AC05-76RL01830
RP-ID  :  978552

美国|英语

来源: UNT Digital Library

【 摘 要 】

This work reported here is part of the U. S. Department of Energy’s Science and Technology Initiative to develop improved conceptual models of flow and transport in the vadose zone, particularly for the Hanford Site, Washington. The National Academy of Sciences has identified significant knowledge gaps in conceptual model development as one reason for discovery of subsurface contamination in unexpected places. Inadequate conceptualizations limits, not only the understanding of long-term fate and transport, but also the selection and design of remediation technologies. Current conceptual models are limited partly because they do not account for the random heterogeneity that occurs under the extremes of very nonlinear flow behavior typical of the Hanford vadose zone. A major improvement in conceptual modeling of the Hanford vadose zone includes a better understanding and description of soil anisotropy, a property that appears to control much of the subsurface flow and transport in layered sediments at the Hanford Site.