Filters: Tags: Channel Morphology (X)
8 results (9ms)|
Filters
Date Range
Extensions Types
Contacts
Categories Tag Types Tag Schemes |
These topographic/bathymetric digital elevation models (DEMs) were collected and compiled to characterize erosion and deposition in the Colorado River and in an adjacent zone of laterally recirculating flow (eddy) during both average flow conditions and during a controlled flood that occurred in March 2008. The objectives of the study were to measure changes sandbar morphology that occurred during changes in discharge associated with the controlled flood. These data were collected between February 6 and March 31, 2008 in a 1-mile study reach on the Colorado River within Grand Canyon National Park beginning 44.5 miles downstream from Lees Ferry, Arizona. These data were collected by the USGS Grand Canyon Monitoring...
Surveys of channel and floodplain topography were used to characterize the morphology of two reaches of the lower Merced River in California's Central Valley and to parameterize a hydraulic model. These data were collected to support research intended to evaluate the extent to which large-scale restoration projects provided improved salmon spawning habitat. A related goal of this study was to improve our understanding of the geomorphic factors influencing spawning site selection by salmon. At the Merced River Ranch field site, river channel and floodplain topography was measured using a combination of real-time kinematic (RTK) GPS for wadable parts of the channel, an echo sounder for deep pools, and photogrammetry...
Categories: Data;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: California,
Central Valley,
Elevation,
Habitat,
Merced River,
These data consist of measurements of riverbed and floodplain bathymetry and topography, measurements of water-surface elevations and ancillary data. These data are specific to the corridor of the Colorado River from the confluence of the Green and Colorado Rivers near Spanish Bottom, Utah in Canyonlands National Park to the confluence with the Dirty Devil River in Glen Canyon National Recreation Area. The time period for these data are 2020 and 2021. The raster data are digital elevation models (DEMs) for segments of the Colorado River in Canyonlands National Park, Utah and include both bathymetric and topographic data. The data collected in 2020 consist of bathymetric and topographic data for segments of the Colorado...
Flow recommendations for the Duchesne River with a Synopsis of Information Regarding Endangered Fish
Flow recommendations for the Duchesne River represent an integration of physical processes needed to maintain channel complexity and substrate quality (high flow needs), with maintenance of adequate flows needed for endangered fish access, and productivity needed to sustain the prey base supporting Colorado pikeminnow (base flow needs). High flow recommendations for the Duchesne River were designed to maintain the geomorphic processes that form and maintain the present level of channel complexity, dictate habitat availability for endangered fishes, and provide discharge needed to rearrange substrate. These processes are based on the flows needed to mobilize bed load, maintain channel movement, and transport fine...
Categories: Publication;
Types: Citation;
Tags: Duchesne River,
channel morphology,
endangered fish,
flow recommendations,
non-native fish,
This study examines channel form of the Verde River system in order to explain system fragmentation. Morphologic analyses draw from discharge and shear stress calculations generated by modelling the flow through 14 surveyed cross-sections along the Verde River, representing six river segments with distinct hydrologic and geologic characteristics. At-a-station and downstream hydraulic geometries for the Verde River highlight local variability in channel morphology. Modified at-a-station hydraulic geometry analyses using cross-section subsection discharge and shear stress values similarly show greater variability within cross-sections than between cross-sections. Competence and capacity increase at a fairly uniform...
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: River Research and Applications,
channel morphology,
fragmentation,
hydraulic geometry
The acoustic Doppler current profiler (ADCP) data were collected and compiled to characterize the velocity patterns in channel of the Colorado River and in an adjacent zone of laterally recirculating flow (eddy). Topographic/bathymetric digital elevation models (DEMs) were collected and compiled to characterize erosion and deposition in the Colorado River and in an adjacent zone of laterally recirculating flow (eddy). Profiles of suspended-sediment concentration were also collected and compiled to characterize suspended sediment in the Colorado River. These datasets were collected during both average flow conditions and during a controlled flood that occurred in March 2008. Objectives of the study were to measure...
The Green River is a major tributary of the Colorado River with a drainage area of 115 770 km2 in Colorado, Utah and Wyoming. The influence of Flaming Gorge Dam on sediment transport and the potential for future channel change were studied using comparative analysis of historical aerial photographs from 1952 to 1987 and geographical information systems, published sediment (1951-86) and discharge (1965-87) records, and sediment data collected during 1986-8. Since the closure of the dam in 1964, new equilibrium channel widths were apparently achieved by 1974 in the reach 161-279 km below Flaming Gorge Reservoir and by 1981 in the reach 465-509 km below the reservoir. Recent high flows have resulted in an increase...
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Regulated Rivers: Research & Management,
alluvial streams,
channel morphology,
channels,
effective discharge,
The Chesapeake and Delaware Floodplain Network was implemented to measure and model sediment and nutrient fluxes and characterize the geomorphometry of streambanks and floodplains across the mid-Atlantic region.
|
|
