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Showing 1 to 20 of 54 for “"sinkholes"”.
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Sinkholes in the marble and dolostone karst of Sylacauga, Alabama
The hypothesis of this study is that sinkhole occurrence is being anthropogenically accelerated or induced in the study area. The objectives of this research are: - to identify natural conditions in the study area which are associated in the literature with sinkhole development - to identify the …
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Analytical and numerical study of dolomite sinkholes in Centurion South Africa
Sinkholes encompass the withdrawal of shallow sediment into deep hollow compartments located in karstic stratum. These subsequent surface openings associated with karst geology have inhibited multiple infrastructure developments. Sinkholes are triggered by the alteration of the existing groundwater …
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Analysis of Paleokarst Sinkholes in the Arkoma Basin using 3-D Seismic
… attribute volumes used to identify paleokarst sinkholes within the Viola Group include coherency and curvature attributes. ImageJ software was used to aid in counting and measuring paleokarst sinkholes identified using seismic mapping, coherency, and curvature attribute volumes. In addition to …
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Heavy Metal Concentrations in Springs and Sinkholes in and Around Springfield, Greene County, Missouri
… if heavy metals are present in springs and sinkholes located in and around Springfield, Greene County, Missouri. Water suspended solid samples were collected from eight springs including Ritter East (RE), Ritter West (RW), Jones (J), Sequiota (SQ), Silver (SV), Ward (WA), Sander (SA), and …
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An automated method for locating sinkholes in Montgomery County, Virginia, using digital elevation models
… Digital Elevation Models (DEM's) to locate sinkholes has been investigated. Three quadrangle maps, those of Blacksburg, Ironto and Newport, were selected as these areas are dotted with sinkholes. An algorithm was developed to extract sinkholes from DEM's. Sinkholes were also digitized from …
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Hydrogeophysical quantification of infiltration and recharge through soil-filled sinkholes using Time Domain Reflectometry and Electrical Resistivity Tomography
… and hydrogeophysical study of two soil-filled sinkholes mantled by ancient New River fluvial terrace deposits. Research was performed at the Virginia Tech Kentland Experimental Farms in Whitethorne, Virginia, USA between fall 2003 and spring 2007, and focused on characterizing infiltration, …
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Effect of sinkholes on soil moisture and ground water recharge at an abandoned underground coal mine near Wilton, North Dakota
… and southwest North Dakota has produced numerous sinkholes. Previous studies in the Northern Great Plains have suggested depression-focused recharge may be a significant ground water recharge mechanism in this region. Thus, sinkholes may increase soil moisture and ground water recharge. Current …
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The geochemistry of water-filled sinkholes at Bitter Lake National Wildlife Refuge, Roswell, NM : implications for hydrochemical evolution and trophic support
… a hydrochemical baseline survey of water-filled sinkholes at Bitter Lake Nation Wildlife Refuge (Roswell, NM). Water samples from 10 representative sinkholes taken at 1.0m increments were analyzed for major ions, stable isotopes [δ18O, δD], and dissolved gases. Sinkholes are surface features at a …
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Electrical Conductivity and Resistivity Study of Heterogeneous Sediment in Inwood Hill Park, Manhattan, NY
… adjacent to the inlet contains several small sinkholes. Electrical resistivity and ground conductivity techniques were used in order to get an understanding of the hydrological processes of this field. It was hypothesized that the formation of the sinkholes is due to the tidal forcing of the …
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GIS-based spatial analysis coupled with geophysical imaging to identify and evaluate factors that control the formation of karst sinkholes in southwestern Missouri
<p>"Sinkholes are inherent features of the karst terrain underlying much of Greene County, Missouri. These features present hazards and engineering challenges to existing infrastructure unknowingly constructed on a seemingly benign ground surface. The primary objective of this research was to …
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Modification of the SWAT Model to Simulate Hydrologic Processes in a Karst-influenced Watershed
… watersheds, karst features such as sinkholes and sinking streams act as rapid pathways for carrying water and pollutants into streams and groundwater. Human activities on karst landscapes can present some special problems such as alterations to hydrologic regime, contamination of …
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Seismic Expressions of Paleokarst
… Karst can be are expressed on seismic records as sinkholes, paleocave collapse, and tower morphologies. Seismic modeling indicates that karst can be modeled and imaged to better understand its subsurface architecture. High variance, negative curvature, bright amplitudes/localized bright spots …
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Sinkhole Form as an Indicator of Process in Karst Landscape Evolution
… non-solutional processes in the development of sinkholes in two contrasting karst subtypes (normal and exhuming fluviokarst) of the Mitchell Plain, south central Indiana.
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Engineering classification of pedologic soil groups in Knox County, Tennessee, for residential housing
… fluvial soils, old local fluvial soils, soils in sinkholes, soils shallow to bedrock, soils deep to bedrock, and unclassified soils. Each of these groups possesses characteristic engineering features. The poor hydrologic position of alluvial soils, recent local fluvium, and soils in sinkholes …
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Analysis of Sinkhole Susceptibility and Karst Distribution in the Northern Shenandoah Valley, Virginia: Implications for Low Impact Development (LID) Site Suitability Models
… three major trends in sinkhole occurrence: (1) sinkholes are more abundant in relatively pure carbonate rocks of Ordivician age; (2) sinkhole occurrence increases with proximity to fault lines; and (3) sinkholes are sparse near streams, most abundant 600 to 1400 feet away from surface streams. …
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The Prediction and Occurrence of Chimney Subsidence in Southwestern Pennsylvania
… known as chimney caves, are in the form of sinkholes and develop above abandoned room-and-pillar mines. Chimney caving is the most dominant type of subsidence in southwestern Pennsylvania, yet there are no accurate means available to predict their occurrences. Therefore, an investigation has …
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A Statistical Analysis of Doline Characteristics in the Brookline Quadrangle, Missouri
Dolines, known commonly as "sinkholes," are common karst features in and around Springfield, Greene County, Missouri. While many studies on karst features have been conducted in Greene County, none have focused on the Brookline Quadrangle, located just west of Springfield. This study focused on the …
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Environmental Planning of the Ebenezer Quadrangle, Missouri
… features with over 500 identified dolines or "sinkholes" and areas of internal drainage called sinksheds. Approximately 64% of the soils of the study area are unsuitable to septic tank absorption fields and almost 50% of the soils are unsuitable for building sites. By knowing where these …
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Using Geographical Information Systems to Investigate Spatial Patterns in Fossils of Tapirus polkenis from the Gray Fossil Site, Washington County, Tennessee
… origin, which were deposited after multiple sinkholes formed in the underlying Knox Group basement carbonates. Three-dimensional nearest neighbor analysis has been applied to fossils of <em>Tapirus polkensis</em>, characterizing the spatial patterns exhibited. These analyses determined the …
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Spring Studies and A Decision-Making Process to Guide Groundwater Contamination Prevention in an Agricultural Karst Basin
… found that cattle grazing near sinking streams, sinkholes, and springs contribute to the elevated levels of fecal coliform bacteria in the groundwater. Six sites in Buckeye Creek basin were monitored for fecal coliform contamination and then analyzed in order to determine where best management …
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