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Full-Text Articles in Physical Sciences and Mathematics
Theoretical Analysis Of Cross Joint Geometries And Their Classification, Taixu Bai
Theoretical Analysis Of Cross Joint Geometries And Their Classification, Taixu Bai
FIU Electronic Theses and Dissertations
Joints as opening-mode fractures play important roles as indicators of tectonic stress fields and as pathways for underground fluid flow. This thesis analytically investigates the relationships among cross joint geometry, orientations and ratios of remote principal stresses, and fluid pressure. Results show that main trends of cross joints are perpendicular to the least far field stresses during cross joint formation, and cross joint paths can be used to determine relative magnitudes of remote principal stresses. Based on the theoretical derivation, cross joint geometries are grouped into five main categories: curving-parallel, curving-perpendicular, quasi-curving-parallel, quasi-curving-perpendicular and non-curving geometries. By introducing the concepts …
Investigation Of Spatial Patterns Of Ground-Water Exchange With Lakes, Using A Three-Dimensional Numerical Model, Indranil Bandopadhyay
Investigation Of Spatial Patterns Of Ground-Water Exchange With Lakes, Using A Three-Dimensional Numerical Model, Indranil Bandopadhyay
FIU Electronic Theses and Dissertations
Hydrogeologic variables controlling groundwater exchange with inflow and flow-through lakes were simulated using a three-dimensional numerical model (MODFLOW) to investigate and quantify spatial patterns of lake bed seepage and hydraulic head distributions in the porous medium surrounding the lakes. Also, the total annual inflow and outflow were calculated as a percentage of lake volume for flow-through lake simulations. The general exponential decline of seepage rates with distance offshore was best demonstrated at lower anisotropy ratio (i.e., Kh/Kv = 1, 10), with increasing deviation from the exponential pattern as anisotropy was increased to 100 and 1000. 2-D vertical section models constructed …