Publication Date
12-2017
Date of Final Oral Examination (Defense)
5-1-2017
Type of Culminating Activity
Thesis
Degree Title
Master of Science in Geophysics
Department
Geosciences
Supervisory Committee Chair
John Bradford, Ph.D.
Supervisory Committee Member
James P. McNamara, Ph.D.
Supervisory Committee Member
Lee M. Liberty, M.S.
Abstract
The critical zone is defined as the upper most portion of the crust extending from the top of unweathered bedrock to the top of the vegetation canopy. It is the zone in which inorganic rock is transformed into biologically useful soils and saprolites in a process termed weathering. Because the critical zone is the connection between the subsurface and surface it plays a role in a wide variety of biological, hydrologic, and climatic processes. Understanding the critical zone though is inherently difficult because its scale and heterogeneity often means direct sampling methods, e.g. soil pits and cores, under represent the heterogeneous critical zone process. Geophysical methods are increasingly applied to study the near-surface processes at a variety of spatial and temporal scales. This paper presents two geophysical experiments that capture two different hydrologic processes and two different scales: the first is the study of the influence of aspect, elevation, and snow accumulation on weathering depths at the catchment scales using seismic refraction tomography and second is the application of electrical resistivity tomography to observe the heterogeneous seasonal change of soil moisture and its connectivity at the plot scale.
DOI
https://doi.org/10.18122/B22X42
Recommended Citation
Nielson, Travis, "Application of Hydrogeophysical Imaging in the Reynolds Creek Critical Zone Observatory" (2017). Boise State University Theses and Dissertations. 1354.
https://doi.org/10.18122/B22X42