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23 results for “weir”
O. mykiss passages at the Stanislaus River weir, 2005-2025
The Central Valley Project Improvement Act (CVPIA) provides funds to aid the San Joaquin Basin Steelhead Collaborative and initiate a Steelhead Life-Cycle Monitoring Program. This dataset includes observations of O. mykiss in the Stanislaus River during the steelhead spawning migration period, September through May. Fish are observed at an Alaskan-style weir outfitted with a VAKI Riverwatcher fish counting device. The counting device provides visual records of upstream passing individuals that are later reviewed by an experienced biologist. During times when the counting device is offline, a continuous video feed is reviewed to provide counts and identifications of passing fish. The length of passing fish is estimated using a known body depth to length ratio derived from individuals trapped and measured at the weir. The weir also has a trap box that, when closed, allows investigators to physically capture fish for measurements, biological sample collection, and injection of a PIT tag. There is also a PIT tag antenna affixed to the weir allowing detection of PIT tagged fish. There are three datasets currently associated with this project, 1) passage data for all O. mykiss from 2005 through 2025, 2) O. mykiss that were captured and processed from the trap, and 3) PIT tag detections from the PIT antenna.
Monitoring juvenile Chinook salmon outmigration using rotary screw traps on the Sacramento River near Tisdale Weir
The Tisdale RST sampling site is operated by the California Department of Fish and Wildlife (CDFW) to obtain information on the temporal distribution, relative abundance, and composition of race and species of juvenile Chinook salmon (Oncorhynchus tshawytscha) and steelhead trout (O. mykiss) emigrating from the upper Sacramento River and tributaries to the Sacramento-San Joaquin Delta (Delta). The project collects data near the Tisdale Weir on the Sacramento River, using two paired rotary screw traps (RSTs) outfitted with two 8-ft diameter cones. The RST monitoring site at Tisdale Weir was established meet a requirement of the 2011 amendment to the reasonable and prudent alternative (RPA) of the 2009 biological and conference opinion (BO) on the long-term operations of the Central Valley Project (CVP) and State Water Project (SWP). The amendment required the Bureau of Reclamation (USBR) and the California Department of Water Resources (DWR) to fund a new juvenile salmonid monitoring site on the Sacramento River between Red Bluff Diversion Dam (RBDD) and Knights Landing. The purpose of the new site was to provide early warning of fish movement and determine survival of listed fish species leaving spawning habitat in the upper Sacramento River. CDFW issued ITP 2081-2019-066-00 to DWR on March 31, 2020, for the long-term operation of the SWP in the Delta. Condition 7.5.2 of the ITP requires the development and establishment of a spring-run Chinook salmon juvenile production estimate (JPE) to increase understanding regarding the impacts water operations have on the spring-run Chinook salmon population in the Sacramento River watershed and inform the development of minimization measures to reduce take of spring-run Chinook salmon at Delta fish salvage facilities. Data from the Tisdale RST will be used along with other datasets from juvenile salmonid monitoring programs in the Sacramento River Watershed to inform the development of JPE modeling approaches. Salmonid data c
Biogeochemistry data set for Imnavait Creek Weir on the North Slope of Alaska 2002-2024.
Data file containing biogeochemical data of water samples collected in Imnavait Creek, North Slope of Alaska. Sample site descriptors include a unique assigned number (sortchem), site, date, time, depth, distance (downstream), and elevation. Values of variables measured in the field include temperature, conductivity, pH. Chemical analysis for samples include alkalinity, dissolved organic carbon (DOC), inorganic and total dissolved nutrients particulate carbon, nitrogen, and phosphorus, cations and anions.
Hubbard Brook Experimental Forest: Sediment Yield in Weir Basins, 1956 - ongoing
Each year the sediment that collects in the stilling basin behind the v-notch weir is measured, excavated, sampled, dried, and weighed for Watersheds 1 through 8 at the Hubbard Brook Experimental Forest. Oven-dry weights are then calculated for all the sediment removed from the basin and extrapolated back over the watershed as mass of soil material lost per unit area. These data were gathered at the Hubbard Brook Experimental Forest in Woodstock, NH, which is operated and maintained by the USDA Forest Service, Northern Research Station.
Precipitation data from four locations within the Tromble Weir experimental watershed, located at the Jornada Basin LTER site, 2010-ongoing
This data package contains one-minute resolution precipitation data from tipping bucket rain gauges (Texas Electronics) at four locations in the Tromble Weir watershed area of the Jornada Basin in southern New Mexico, USA. These rain gauges are used to help quantify the water balance across the small experimental watershed. Values have been used to investigate groundwater recharge, soil infiltration rates, and as forcings for hydrologic models. This is an ongoing dataset that will be updated annually.
Soil volumetric water content data from fifteen locations, 3 depths at each location, within the Tromble Weir experimental watershed at the Jornada Basin LTER site, 2010-ongoing
This data package contains 30-minute soil volumetric water content (VWC) data collected at fifteen locations along 3 transects (5 locations per transect) in the Tromble Weir Watershed area of the Jornada Basin in southern New Mexico, USA. At each location, soil sensors measure VWC at three depths, 5, 15 and 30 cm, in units of cubic meters of water per cubic meter of soil. These measurements are used to help quantify the water balance across the small experimental watershed. Values have been used to investigate groundwater recharge, soil infiltration rates, and to evaluate the performance of hydrologic models. This is an ongoing dataset that will be updated annually.
Standard meteorology and ancillary data from the Tromble Weir experimental watershed tower at the Jornada Basin LTER site, 2010-ongoing
This data package contains 30-minute standard meteorology and ancillary data collected at an eddy covariance tower in the Tromble Weir Watershed area of the Jornada Basin in southern New Mexico, USA. These data are used to quantify the water and energy balances in a small experimental watershed, including observational studies to calculate groundwater recharge as a water balance residual, to build relations between soil moisture state and ET flux, and to quantify land-atmosphere interactions and improve our understanding of the eddy covariance method. Additionally, they have been used in modeling studies as a validation of model performance. This file presents the ancillary data collected at the eddy covariance tower, excluding the 20Hz flux measurements that are archived at AmeriFlux (site US-Jo2; http://ameriflux.lbl.gov/sites/siteinfo/US-Jo2). This includes soil moisture and temperature at 4 depths, air temperature and pressure, humidity and vapor pressure, ground heat flux, incoming and outgoing longwave and shortwave radiation, photosynthetically active radiation for a subset of the study period, and surface soil temperature. Instrument descriptions and detailed procedures are found in the references listed in the Methods section of this package. This is an ongoing dataset that will be updated annually.
Hubbard Brook Experimental Forest Weirs: GIS Shapefile
Diazo copy of Hubbard Brook Watershed Map generated stereophoto- grammetrically based on May, 1956 aerial photography. Shows New Hampshire state plane coordinate system reference points which were projected into UTM Zone 19 and used as reference tics. Also shown were the rain gages, stream weirs and watershed boundaries. The stream weirs were manually digitized. Data distributed as shapefile in Coordinate system EPSG:26919 - NAD83 / UTM zone 19N.
Experimental data for validation of a variational RANS level III flow model: water waves over an array of obstacles and Ogee weir flows
<p>Experimental dataset for the validation of a variational RANS level III flow model. The experimental data correspond to experiments on unsteady of water waves over an array of obstacles and steady curved flows over an Ogee weir. The experiments were conducted at the Hydraulics Laboratory at the Univeristy of Córdoba. </p>
Water Level, Water Temperature, and Flow Measurements from the Ball Creek weir house #9, Coweeta Hydrologic Laboratory, Otto, NC.
This data set contains water level, water temperature, and calculated discharge values from the Ball Creek weir house #9, Coweeta Hydrologic Laboratory, Otto, NC. Using a pressure transducer, measurements are taken every 60 seconds with the average, minimum, and maximum values for water pressure and water temperature saved to the output data table hourly. Water level and discharge are calculated using the hourly average water pressure, and saved to the online data files.
Mass and energy fluxes from the US-Jo2 AmeriFlux eddy covariance tower in Tromble Weir experimental watershed at the Jornada Basin LTER site, 2010-ongoing
This data package contains metadata for, and links to, 30-minute mass and energy flux data collected at an eddy covariance tower in the Tromble Weir Watershed area of the Jornada Basin in southern New Mexico, USA. These data are used to quantify the water and energy balances in a small experimental watershed, including observational studies to calculate groundwater recharge as a water balance residual, to build relations between soil moisture state and ET flux, and to quantify land-atmosphere interactions and improve our understanding of the eddy covariance method. Additionally, they have been used in modeling studies as a validation of model performance. The .csv files included in this package list and describe the data entities and variables present in data files archived at the AmeriFlux data repository (site US-Jo2; http://ameriflux.lbl.gov/sites/siteinfo/US-Jo2). The data at AmeriFlux include the 30-minute mass and energy fluxes calculated from 20 Hz data collected at the Tromble Weir Watershed tower. Instrument descriptions and detailed procedures are found in the references listed in the Methods section of this EDI package. This is an ongoing dataset that will be updated annually.
Lac Croche V-notch weir water flow data collected at the Station de biologie des Laurentides (SBL) de l'Université de Montréal, St-Hippolyte QC
<p>These datasets comprise hourly and daily water flow data collected at the Lac Croche v-notch weir at the Station de biologie des Laurentides (SBL) between 2014/04/01 and 2019/05/01.</p>
Streamflow and rain event data from the Tromble experimental watershed weir in the Jornada Basin, southern New Mexico USA, during 2 periods: 1977-1985 and 2003-2011
This data package contains long-term hydrologic event data collected in the Tromble experimental watershed in the Jornada Basin of southern New Mexico, USA. Streamflow and precipitation data were collected at an instrumented flume below a 4.7 hectare shrub-dominated catchment during two periods: 1977-1985 and 2003-2011. This dataset was assembled to evaluate the effects of changes in rainfall on runoff in this Chihuahauan desert watershed. Four data files are available here, including event precipitation totals and sub-hourly runoff details for hydrologic events during both time periods. Variables measured include event precipitation, stage heights at the flume, and calculated discharge rates. This study is complete. For further information, refer to: Turnbull, L., A. J. Parsons, J. Wainwright, and J. P. Anderson. "Runoff responses to long-term rainfall variability in a shrub-dominated catchment." Journal of arid environments 91 (2013): 88-94.
Data for: A novel and enhanced calibration of the tilting weir as a flow measurement structure
<p>To achieve reliable and equitable water distribution it is necessary to accurately estimate the volumetric discharge of water flow through rivers and canals. One such method of accomplishing this is by using hydraulic structures, such as the tilting weir. This structure not only can be used to measure the discharge of water on a continuous basis, but also allows for regulating the water level upstream of the structure. Presently, tilting weirs are often used to control water levels, but the literature on their utilization as flow measurement structures has remained sparse. This study presents a thorough analysis of laboratory experiments on scaled models of tilting weirs, where the flow depth upstream of the structure (i.e., head) and the inclination angle are used to calibrate an equation to estimate the discharge to a high degree of accuracy. Operational guidelines to ensure minimum uncertainty in measurement are also given.</p> <p>The data published here include head and discharge measurements for all experiments conducted, including information on the experimental location, date, and model dimensions. Publication of this data is intended to allow other researchers to verify the calibration procedure laid out in the primary article, and as a comparative dataset for future calibrations.</p>
Steinbauer and Weir, 2007
Steinbauer, M.J. and Weir, T.A. (2007), Summer activity patterns of nocturnal Scarabaeoidea (Coleoptera) of the southern tablelands of New South Wales. Australian Journal of Entomology, 46: 7-16. <p></p>https://doi.org/10.1111/j.1440-6055.2007.00579.x<p></p>
Data for: A novel and enhanced calibration of the tilting weir as a flow measurement structure
Open the record for dataset details and reuse information.
Marcell Experimental Forest site, station Total runoff of South Unit Watershed S2 weir, study of mean daily streamflow in units of litersPerSecond on a monthly timescale
The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Marcell Experimental Forest (MAR) contains mean daily streamflow measurements in litersPerSecond units and were aggregated to a monthly timescale.
Marcell Experimental Forest site, station Total runoff of South Unit Watershed S2 weir, study of mean daily streamflow in units of litersPerSecond on a yearly timescale
The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Marcell Experimental Forest (MAR) contains mean daily streamflow measurements in litersPerSecond units and were aggregated to a yearly timescale.
Estuarine dams and weirs: Global analysis and synthesis
<p>Global estuarine dam and weir data.</p> <p>(See readme for data description).</p>
VAMONOS - Open-channel flow over weirs. Experimental data.
<p>This dataset contains the results from the experimental tests carried out at the hydraulics laboratory of the Civil Engineering School, at University of A Coruña (Spain), as part of the VAMONOS (Vertically-averaged models for non-hydrostatic flows) project (CTM2017-85171-C2-2-R). The aim of the project is the development of enhanced 2D river flow models including additional terms to account for non-hydrostatic pressure and mixed flow conditions around hydraulic structures.</p> <p>This data package includes experimental results on 9 different weir geometries that were tested in an open channel. The experimental facility consists of a 15 m flume with a square cross section of 0.5 x 0.5 m. Water depths were measured with an automatic data acquisition system on a grid of approximately 125 points. Each weir was tested under two different flow conditions. In all the tests the inlet discharge was close to 30 l/s, while the downstream water level was varied from one test to another, in order to obtain fully submerged and free discharge conditions.</p> <p>This dataset is structured in two pdf documents and three folders:</p> <ul> <li><em>Summary_tests.pdf</em>. This file summarizes all the experimental tests. </li> <li><em>Data_package_description.pdf</em>. This document includes information about the experimental facilities, the test conditions and the uploaded files.</li> <li><em>Raw_data.</em> This folder includes the raw data recorded during the tests.</li> <li><em>Matlab_files. </em>This folder contains three Matlab files (.m) that can be used to process the raw data and to generate some figures.</li> <li><em>Processed_data. </em>This folder contains three documents per weir that include the results obtained after processing the raw data. For each test, it is possible to find a pdf with the weir geometry and a text file with the results of the submerged and free discharge tests.</li> </ul> <p><strong>Those interested in experimental data for the calibration of numerical models or the analysis of empirical discharge rating curves, are suggested to work only with the data included in the folder <em>Processed_data.</em></strong></p> <p>Further details on the experimental setup are given in the document <em>Data_package_description.pdf</em></p>
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OpenNeuro
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