Kansas Geological Survey Scholarly Works
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This collection contains works of the researchers affiliated with the Kansas Geological Survey.
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Are we saving water? Simple methods for assessing the effectiveness of groundwater conservation measures
(Elsevier, 2023-09-01)Substantial storage reductions by irrigation pumping in many of the world’s major aquifers jeopardize future food production. As a result, new conservation measures are being utilized to reduce pumping and extend aquifer ... -
Using the factors of soil formation to assess stable carbon isotope disequilibrium in late Pleistocene (MIS 3) buried soils of the Great Plains, North America
(Elsevier, 2023-06-15)The stable carbon isotope composition of both soil organic matter (SOM) and pedogenic carbonate are widely used as paleoenvironmental proxies. This study utilizes δ13C analyses to reconstruct bioclimatic change from a ... -
Hotspots for social and ecological impacts from freshwater stress and storage loss
(MDPI, 2022-01-21)Humans and ecosystems are deeply connected to, and through, the hydrological cycle. However, impacts of hydrological change on social and ecological systems are infrequently evaluated together at the global scale. Here, ... -
River infiltration to a subtropical alluvial aquifer inferred using multiple environmental tracers
(American Geophysical Union, 2015-06-21)Chloride (Cl−), stable isotope ratios of water (δ18O and δ2H), sulfur hexafluoride (SF6), tritium (3H), carbon-14 (14C), noble gases (4He, Ne, and Ar), and hydrometry were used to characterize groundwater-surface water ... -
Chemistry of groundwater discharge inferred from longitudinal river sampling
(American Geophysical Union, 2014-02-22)We present an approach for identifying groundwater discharge chemistry and quantifying spatially distributed groundwater discharge into rivers based on longitudinal synoptic sampling and flow gauging of a river. The method ... -
A Stochastic Analysis of Pumping Tests in Laterally Nonuniform Media
(American Geophysical Union, 1991-09)Conventional pumping test analysis methodology assumes that aquifer transmissivity is invariant in space. The ramifications of this assumption are examined for hypothetical units whose variations in transmissivity are ... -
A modeling tool to evaluate regional coral reef responses to changes in climate and ocean chemistry
(Association for the Sciences of Limnology and Oceanography, 2008-09-03)We developed a spreadsheet-based model for the use of managers, conservationists, and biologists for projecting the effects of climate change on coral reefs at local-to-regional scales. The COMBO (Coral Mortality and ... -
Latent Facies Mapping from Binary Geological Data
(University of Chicago Press, 1991-03)Many geological observation sets contain discrete-state data, which can be encoded as binary patterns. When there are conditional relationships between the variables, latent class analysis may be applied to subdivide the ... -
Ferric oxyhydroxide microparticles in water
(National Institute of Environmental Health Sciences, 1974-12)Mineralogy and specific surface area are major controls on the stabilities of ferric oxyhydroxide microparticles in natural waters. The thermodynamic stabilities of ferric oxyhydroxides, as described by the activity product ... -
A field investigation of phreatophyte-induced fluctuations in the water table
(American Geophysical Union, 2007-02-07)[1] Hydrographs from shallow wells in vegetated riparian zones frequently display a distinctive pattern of diurnal water table fluctuations produced by variations in plant water use. A multisite investigation assessed the ... -
Relative importance of dispersion and rate-limited mass transfer in highly heterogeneous porous media: Analysis of a new tracer test at the Macrodispersion Experiment (MADE) site
(American Geophysical Union, 2010-03-20)[1] A single-well injection-withdrawal (SWIW) bromide tracer test was conducted to further investigate transport processes at the Macrodispersion Experiment (MADE) site on Columbus Air Force Base in Mississippi. The bromide ... -
Evaluation of the applicability of the dual-domain mass transfer model in porous media containing connected high-conductivity channels
(American Geophysical Union, 2007-12-20)[1] This paper evaluates the dual-domain mass transfer (DDMT) model to represent transport processes when small-scale high-conductivity (K) preferential flow paths (PFPs) are present in a homogenous porous media matrix. ... -
Stochastic uncertainty analysis for solute transport in randomly heterogeneous media using a Karhunen-Loève-based moment equation approach
(American Geophysical Union, 2007-07-18)[1] A new approach has been developed for solving solute transport problems in randomly heterogeneous media using the Karhunen-Loève-based moment equation (KLME) technique proposed by Zhang and Lu (2004). The KLME approach ... -
Simulation assessment of the direct-push permeameter for characterizing vertical variations in hydraulic conductivity
(American Geophysical Union, 2008-02-22)[1] The direct-push permeameter (DPP) is a tool for the in situ characterization of hydraulic conductivity (K) in shallow, unconsolidated formations. This device, which consists of a short screened section with a pair of ... -
Pumping tests in networks of multilevel sampling wells: Motivation and methodology
(American Geophysical Union, 1999-11)The identification of spatial variations in hydraulic conductivity (K) on a scale of relevance for transport investigations has proven to be a considerable challenge. Recently, a new field method for the estimation of ... -
Geostatistical analysis of centimeter-scale hydraulic conductivity variations at the MADE site
(American Geophysical Union, 2012-02-21)[1] Spatial variations in hydraulic conductivity (K) provide critical controls on solute transport in the subsurface. Recently, new direct-push tools were developed for high-resolution characterization of K variations in ... -
Reply to comment by J.-P. Renaud et al. on “An assessment of the tracer-based approach to quantifying groundwater contributions to streamflow”
(Wiley [Commercial Publisher], 2007-09-22) -
A new method for high-resolution characterization of hydraulic conductivity
(American Geophysical Union, 2009-08-29)[1] A new probe has been developed for high-resolution characterization of hydraulic conductivity (K) in shallow unconsolidated formations. The probe was recently applied at the Macrodispersion Experiment (MADE) site in ... -
A Stochastic Analysis of Pumping Tests in Laterally Nonuniform Media
(American Geophysical Union, 1991-09)Conventional pumping test analysis methodology assumes that aquifer transmissivity is invariant in space. The ramifications of this assumption are examined for hypothetical units whose variations in transmissivity are ... -
Importance of a sound hydrologic foundation for assessing the future of the High Plains Aquifer in Kansas
(National Academy of Sciences, 2014-01-27)Steward et al. (1) assess the hydrologic and agricultural future of the High Plains Aquifer. We have many concerns about hydrologic aspects of their study and describe the most significant here. The authors state “…the ...
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