New Permeameters for In Situ Characterization of Unsaturated Heterogeneous Permeability: Development, Design, Testing, and Application

Wilson, John L. ; Glass, Robert J.

New Mexico Institute of Mining and Technology (United States)

关键词: Errors;    Performance Testing;    Measuring Instruments;    Site Characterization;    Flow Models;   

DOI  :  10.2172/825068
RP-ID  :  DOE/ER/14704
RP-ID  :  FG07-96ER14704
RP-ID  :  825068

美国|英语

来源: UNT Digital Library

【 摘 要 】

The original objective of our EMSP research was to design, develop, and test new in situ field permeameters for use in spatial variability studies of unsaturated hydraulic properties. We initially focused on activities related to development and testing of techniques for inverting permeameter data, development of numerical tools for data inversion, error evaluation for permeameter design, and permeameter component design. However, the results of error evaluations for permeameter design caused us to redirect our research, and reformulate our research objectives. We discovered that small, simple measurement errors lead to significant bias in the estimated hydraulic properties and their spatial statistics. Our reformulated research objective became the evaluation of the origin, impact and relevance of spatial bias in field-and laboratory-estimated unsaturate hydraulic properties, with an emphasis on spatial statistics and the resulting predictions of stochastic models of flow and contaminant transport.