Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 21 for “"Gaging"”.
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Study of the Virginia V-notch weir-box culvert combination gaging station
A Virginia V-notch weir·box culvert combination gaging station is a discharge measuring device to record the runoff from small watersheds, usually less than two thousand acres in area. The station is composed of a prebuilt highway culvert, a one-foot thick triangular shaped weir placed between wing …
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A Comparative Study of Stream-Gaging Methods Employed in Nonpoint Source Pollution Studies in Small Streams
… of each of the systems investigated. Ten stream-gaging methods were evaluated for their field performance, laboratory performance, and costs. Analysis of the field investigation data indicated that the Marsh McBirney current meter and the One-orange method were the most accurate among the methods …
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Historical Channel Adjustments in the Pascagoula River Basin and Adjacent Systems, Southeast Mississippi
… measurement notes, taken at established USGS gaging stations, were used to determine incremental width, depth, and discharge values. For each section and date, individual depth measurements were subtracted from the adjusted mean gage height, which represents the channel bed or submerged bank …
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Determination of stress concentration factors using experimental methods
… analysis performed on the same geometry. Strain gaging and photoelasticity were chosen as the best methods for stress concentration factor determination.
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Satellite remote sensing of mixing dynamics at a large river confluence
… a methodology that uses remote sensing and USGS gaging station data to estimate spatial patterns of surficial suspended sediment concentrations (SSC) downstream of confluences along large rivers and to determine changes in the amount of mixing over distance from confluences. The method develops a …
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Development and Evaluation of Infilling Methods for Missing Hydrologic and Chemical Watershed Monitoring Data
… factors. A major source of error in many stream-gaging records is lost or missing data caused by malfunctioning stream-side equipment. Studies estimate that between 5 and 20 percent of stream-gaging data may be marked as missing for one reason or another. Reconstructing or infilling missing data …
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Characterization of a Riparian Wetland Renwick Reservoir, Pembina County, ND
… to m onitor ground water movement. Stream gaging and water sampling were conducted one mile upstream from the reservoir to determine the volume and quality of water entering the reservoir. N utrient content was determ ined from the water samples by the NDSHD. Textural analyses revealed that …
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Age and Gender Effects on Strain Response and Biomechanical Performance of C57BL/6 Mice
… image correlation (DIC) technique and strain gaging method. The ulna becomes stiffer compared to the tibia as the mice age and it could be because of a trabecular component which induces flexibility in tibia. The biomechanical performance of femurs, ulnae and tibiae were determined in C57Bl/6 …
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Development of a Hydrologic Model for an Urban Headwater Stream: The Influence of Pervious Surface Properties on Runoff Dynamics
… hydrograph data were downloaded from a USGS gaging station located at the outlet of the catchment. Overall, the MC model performed well for the selected storm events, although it performed best for the storms that occurred closest to when the LULC data were collected. The uncalibrated model …
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A study of the effects of differential loadings on cofferdams
… for cofferdam behavior that can be useful in gaging the expected behavior of other cofferdams and for verifying the accuracy of new forms of predictive tools such as the finite element method.
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CONTROLS ON THERMAL DISCHARGE IN YELLOWSTONE NATIONAL PARK, WYOMING
… used from 15-minute data interval from a USGS gaging station at Tantalus Creek. Patterns of discharge fluctuation were found in each stream. By comparing spectral analysis results of flow data with spectral analysis of published tide data and barometric pressure data, connections were drawn …
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CONTROLS ON THERMAL DISCHARGE IN YELLOWSTONE NATIONAL PARK, WYOMING
… used from 15-minute data interval from a USGS gaging station at Tantalus Creek. Patterns of discharge fluctuation were found in each stream. By comparing spectral analysis results of flow data with spectral analysis of published tide data and barometric pressure data, connections were drawn …
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Identifying A Mechanism For An Infiltration Threshold From The Sunflower River, Ms To The Underlying Alluvial Aquifer
… at a USGS coupled groundwater stream-gaging station located on the Sunflower River in Sunflower, MS show an apparent stage-threshold for infiltration to the underlying alluvial aquifer. This site is located near the center of a large regional groundwater cone of depression in the …
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Improved predictions of contaminant transport in rivers
… developed that uses data readily available at gaging stations operated by the U.S. Geological Survey (USGS). The empirical model represents the tracer response with the Gumbel distribution, which has a skewness coefficient close to the value observed in tracer studies. The proposed model …
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AUGUST STREAM DISCHARGE TRENDS PORTEND IMPACTS OF CLIMATE CHANGE IN THE NORTHERN ROCKIES
… resolution) and water rights records we selected gaging sites based on the length and continuity of discharge records and categorized each site based on the amount of diversion and location of water storage devices. Local significance was examined using the Mann-Kendall non-parametric test and …
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AUGUST STREAM DISCHARGE TRENDS PORTEND IMPACTS OF CLIMATE CHANGE IN THE NORTHERN ROCKIES
… resolution) and water rights records we selected gaging sites based on the length and continuity of discharge records and categorized each site based on the amount of diversion and location of water storage devices. Local significance was examined using the Mann-Kendall non-parametric test and …
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The source of uranium and vanadium at the Langer Heinrich and Klein Trekkopje uranium deposits-genesis and controlling factors for uranium mineralization, Western Namibia.
… start with investigations of the catchment, by gaging the availability of U and V as well as the suitability of the geomorphology and palaeo-climate.
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Erosion behavior and scour risk of extremely coarse streambeds
… based on the maximum discharges measured at USGS gaging stations or computed with USGS StreamStats software. Final limit velocities range from 245 to 549 cm/sec (8 to 18 ft. /sec.). The limit analysis is performed by regression of the particle size and velocity data. This yields a nonlinear, …
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Predictability and trends of annual pollutant loads in Midwestern watersheds
… of critical periods of high load export and also gaging impacts of landuse, management practices, and sources of pollution on overall annual loads. These analyses constitute the first such application of these approaches on a large spatio-temporal scale especially for nutrient export dynamics. I …
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Machining accuracy enhancement using machine tool error compensation and metrology
… are also known as virtual gages. The virtual gaging problem is modeled as a constrained linear program. The optimal solution to the problem can compensate the displacement introduced by workpiece and fixtures and hence guarantee a conforming finished part. To transfer point-set data into …
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