U.S. Geological Survey, New England Water Science Center, 20150228, Depth Grid of the Floodplain for the Winooski River through Waterbury, Vermont, Stage 423 feet.: Scientific Investigations Report 2015-5077, U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, New England Water Science Center, 20150331, Flood maps for the Winooski River in Waterbury, Vermont, 2014: U.S. Geological Survey Scientific Investigations Report 2015-5077.Online Links:
This is a Raster data set. It contains the following raster data types:
The map projection used is NAD 1983 StatePlane Vermont FIPS 4400 Feet.
Planar coordinates are encoded using coordinate pair
Abscissae (x-coordinates) are specified to the nearest 0.000000007286171666009978
Ordinates (y-coordinates) are specified to the nearest 0.000000007286171666009978
Planar coordinates are specified in foot_us
The horizontal datum used is D North American 1983.
The ellipsoid used is GRS 1980.
The semi-major axis of the ellipsoid used is 6378137.0.
The flattening of the ellipsoid used is 1/298.257222101.
U.S. Geological Survey, New England Water Science Center, in cooperation with the Federal Emergency Management Agency (FEMA).
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This dataset was created to support the development of flood inundation maps for documenting the extent of flooding along a reach of the Winooski River in Waterbury, Vermont
Sanborn Map Company, Inc., 20070101, LiDAR Chittenden Floodplain 2007.
Used cross-section data points from surveyed data, accurate to the datum of the survey. Flood inundation extent was manually checked. Complete for the intended 8.3-mile reach of the Winooski River in Waterbury, Vermont.
Used cross-section data points from surveyed data, accurate to the datum of the survey. Flood inundation extent was manually checked. A separate review of the modeled flood extents and elevations was conducted.
Are there legal restrictions on access or use of the data?
- Access_Constraints: None. This dataset is provided by USGS as a public service.
- Use_Constraints:
- Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. The flood boundaries shown were estimated using water stages at the USGS streamgaging station 04288040, Winooski River above Crossett Brook at Waterbury, Vermont, steady-state hydraulic modeling (assuming unobstructed flow) and a digital elevation model. The hydraulic model reflects the land-cover characteristics and any bridge, dam, levee, or other hydraulic structures existing July 2013. Unique meteorological factors (timing and distribution of storm) could cause actual streamflows along the modeled reach to vary from those assumed during a flood, which may lead to deviations from the water-surface elevations and inundation boundaries shown here. Additional areas may be flooded owing to unanticipated backwater from major tributaries along the main stem or from localized debris- or ice-jams. Inundated areas shown should not be used for navigation, regulatory, permitting, or other legal purposes. Although USGS intends to make this server available 24 hours a day, 7 days a week, timely delivery of data and products from this server through the Internet is not guaranteed. The USGS provides these maps "as-is" for a quick reference, emergency planning tool but assumes no legal liability or responsibility resulting from the use of this information. If this series of flood inundation maps will be used in conjunction with National Weather Service (NWS) river forecasts, the user needs to be aware of additional uncertainties which may be inherent or factored into NWS forecast procedures. The NWS uses river forecast models to estimate the quantity and timing of water flowing through selected river reaches in the United States. These forecast models (1) estimate the amount of runoff generated by a precipitation event, (2) compute how the water will move downstream, and (3) predict the flow and stage (water-surface elevation) for the river at a given location (Advanced Hydrologic Predictions Service forecast point) throughout the forecast period (every 6 hours and 3 to 5 days out in many locations). For more information on AHPS forecasts, please see <http://water.weather.gov/ahps/pcpn_and_river_forecasting.pdf>.
603-226-7800 (voice)
Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. The flood boundaries shown were estimated using water stages at the USGS streamgaging station 04288040, Winooski River above Crossett Brook at Waterbury, Vermont, steady-state hydraulic modeling (assuming unobstructed flow) and a digital elevation model. The hydraulic model reflects the land-cover characteristics and any bridge, dam, levee, or other hydraulic structures existing July 2013. Unique meteorological factors (timing and distribution of storm) could cause actual streamflows along the modeled reach to vary from those assumed during a flood, which may lead to deviations from the water-surface elevations and inundation boundaries shown here. Additional areas may be flooded owing to unanticipated backwater from major tributaries along the main stem or from localized debris- or ice-jams. Inundated areas shown should not be used for navigation, regulatory, permitting, or other legal purposes. Although USGS intends to make this server available 24 hours a day, 7 days a week, timely delivery of data and products from this server through the Internet is not guaranteed. The USGS provides these maps "as-is" for a quick reference, emergency planning tool but assumes no legal liability or responsibility resulting from the use of this information. If this series of flood inundation maps will be used in conjunction with National Weather Service (NWS) river forecasts, the user needs to be aware of additional uncertainties which may be inherent or factored into NWS forecast procedures. The NWS uses river forecast models to estimate the quantity and timing of water flowing through selected river reaches in the United States. These forecast models (1) estimate the amount of runoff generated by a precipitation event, (2) compute how the water will move downstream, and (3) predict the flow and stage (water-surface elevation) for the river at a given location (Advanced Hydrologic Predictions Service forecast point) throughout the forecast period (every 6 hours and 3 to 5 days out in many locations). For more information on AHPS forecasts, please see <http://water.weather.gov/ahps/pcpn_and_river_forecasting.pdf>.
| Data format: | Arc GRID file (version 1) |
|---|
Data are supplied in ArcINFO format. Format compatibility is the user's responsibility.
1-888-275-8747 (1-888-ASK-USGS) (voice)