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Relevant bibliographies by topics / Geophysics|Hydrology

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Dissertations / Theses

Academic literature on the topic 'Geophysics|Hydrology'

Author: Grafiati

Published: 4 June 2021

Last updated: 13 February 2022

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Dissertations / Theses on the topic "Geophysics|Hydrology"

1

Lonsert, Reece. "DC Electrical Resitivity constraints on hydrostratigraphy in the lower South Platte River alluvial aquifer in northeastern Colorado." Thesis, Colorado State University, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=1544803.

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<p> This study uses DC Electrical Resistivity Tomography (ERT) to delineate hydrostratigraphic units within the lower South Platte River alluvial aquifer. The geophysical investigation was conducted at Tamarack Ranch State Wildlife Area in northeastern Colorado, where the South Platte River is artificially recharged via pumping to surface recharge ponds and groundwater flow through the underlying unconfined alluvial aquifer system. Twenty-seven ERT profiles collected within a 4.2 km<sup>2</sup> study area on the south bank of the South Platte River define 3 different electrostratigraphic units

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2

Pearson, Patrick Ian 1964. "Application of electric and electromagnetic geophysical methods to detect fractures in unsaturated tuff." Thesis, The University of Arizona, 1992. http://hdl.handle.net/10150/278223.

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Three electrical and electromagnetic geophysical methods were used to examine the moisture and permeability distribution and identify fractures in a partially saturated, fractured ash-flow tuff near Superior, Arizona. Experiments using ground penetrating radar (GPR) to locate targets with known orientations in the tuff were used to assess the angular limits of fracture detection from radar profiles. Identification of fractures from radar records appears to be limited to those with dips of less than 45°. The application of a single well electrical tracer (SWET) technique proved effective in

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3

Yang, Xianjin. "Stochastic inversion of 3-D ERT data." Diss., The University of Arizona, 1999. http://hdl.handle.net/10150/289069.

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A new stochastic inverse algorithm for the inversion of three-dimensional (3-D) electrical resistivity tomography (ERT) data has been developed and tested using both synthetic and field data. My stochastic inverse algorithm produced satisfactory inverse solutions that were very similar to those of the commonly used Occam's inversion. The ill-posed 3-D stochastic inverse problems were stabilized by incorporating a-priori information in the algorithm in the form of an a-priori model, and data and model covariance matrices. There were several novel features in my algorithm. First, a very fast suc

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4

Ripich, Marcella A. "Delineation of subsurface deposits through the integration of geological, geophysical and hydrological data, Rillito Creek, Tucson, Arizona." Thesis, The University of Arizona, 2000. http://hdl.handle.net/10150/278744.

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Rillito Creek, near Tucson, Arizona is like many ephemeral streams in the Southwest in that flows within the creek are an important source of recharge to the regional groundwater system. Increasing demands on groundwater resources in the area have prompted proposals for artificial recharge along the 20-km-long channel. The U.S. Geological Survey, along with the Arizona Department of Water Resources, is developing a regional groundwater-flow model to determine recharge effectiveness. This study provides the geometry and a detailed characterization of recent alluvium and basin-fill deposits. The

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5

Hawkins, Adam J. "Measurement of the spacial distribution of heat exchange in a geothermal analog bedrock site using fiber-otic distributed temperature sensing." Thesis, California State University, Long Beach, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=1527320.

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6

Fang, Allison C. "Variation of Hyporheic Exchange in Thin and Thick Sediment Using Solute Tracer Tests, Geophysical Resistivity, and Sediment Characterization at a Reconstructed Stream." Master's thesis, Temple University Libraries, 2010. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/96244.

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Geology<br>M.S.<br>Solute tracer tests, geophysical resistivity surveys, and sediment characterization were employed at Crabby Creek, an urban stream in southeastern Pennsylvania, to study hyporheic exchange. Hyporheic exchange is defined by the paths that stream water takes to travel in and out of the saturated sediment of a river. The hyporheic zone is an active region of biological and chemical reactions in streams. This study focused on two reaches that have thin (0.67 m) and thick (2.3 m) streambed sediment. Delineating the hyporheic zone from these contrasting sediment beds is important

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7

Kingsley, Janet Elizabeth. "Using electrical conductivity and temperature mapping to locate zones of groundwater discharge in the South Nation River, eastern Ontario." Thesis, University of Ottawa (Canada), 2005. http://hdl.handle.net/10393/27143.

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Groundwater-surface water interactions (GSWI's) interactions are an important part of understanding the hydrological cycle, groundwater and river systems, and in providing estimates of groundwater contributions to rivers (base flow). Seepage/leakage of groundwater into surface waters can be measured directly, but this is very labor-intensive, and therefore not feasible at the scale of a basin. An alternative method, which was used in this study, infers groundwater seepage from electrical conductivity and temperature (EC& T) of water at the bottom of the river, based on the assumption that ther

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8

Luo, Xiaochun. "Spatiotemporal stochastic models for earth science and engineering applications." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0016/NQ44665.pdf.

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9

Liu, Shuyun. "A sequential inverse approach for hydraulic tomography and electrical resistivity tomography: An effective method for site characterization." Diss., The University of Arizona, 2001. http://hdl.handle.net/10150/279846.

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Hydraulic tomography (i.e., a sequential aquifer test) has recently been proposed as a method for characterizing aquifer heterogeneity. In this study a sequential inverse approach is developed to interpret results of hydraulic tomography. The approach uses an iterative geostatistical inverse method to yield the effective hydraulic conductivity of an aquifer, conditioned on each set of head/discharge data. To efficiently include all the head/discharge data sets, a sequential conditioning method is employed. Two-dimensional numerical experiments were conducted to investigate the optimal sampling

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10

Gosnell, Sawyer Ross. "Numerical modeling of induced diffuse flow in seafloor hydrothermal systems." Thesis, Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/13932.

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Examining the processes that control diffuse flow in seafloor hydrothermal systems can provide insight into what is happening below the seafloor at mid-ocean ridges. The diffuse flow could be either entrained seafloor fluids mixed with hot, upwelling fluids, or diffuse flow could be driven by sidewall heating across some low permeability barrier. This barrier would separate the diffuse flow fluids from the high temperature fluids, effectively preventing mixing. Three parameters were manipulated through a numerical model based on the single-pass model, and the fluid and heat flow results ana

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