Stephen D. Belew
VeeAnn A. Cross
2003
Surface Representing the Floor of Lake Mead and the surrounding area: UTM Projection 10m cellsize
raster digital data
Open-File Report
03-320
Woods Hole Coastal and Marine Science Center, Woods Hole, MA
U.S. Geological Survey, Coastal and Marine Geology Program
https://doi.org/10.3133/ofr03320
https://pubs.usgs.gov/of/2003/of03-320/htmldocs/datacatalog.htm
https://pubs.usgs.gov/of/2003/of03-320/data/surfaces/utm11/presentday.zip
David C. Twichell
VeeAnn A. Cross
Stephen D. Belew
2003
Mapping the floor of Lake Mead (Nevada and Arizona): Preliminary discussion and GIS data release
1.0
Open-File Report
03-320
Reston, VA
U.S. Geological Survey
https://pubs.usgs.gov/of/2003/of03-320/
Lake Mead is a large interstate reservoir located in the Mojave Desert of southeastern Nevada and northwestern Arizona. It was impounded in 1935 by the construction of Hoover Dam and is one of a series of multi-purpose reservoirs on the Colorado River. The lake extends 183 km from the mouth of the Grand Canyon to Black Canyon, the site of Hoover Dam, and provides water for residential, commercial, industrial, recreational, and other non-agricultural users in communities across the southwestern United States. Extensive research has been conducted on Lake Mead, but a majority of the studies have involved determining levels of anthropogenic contaminants such as synthetic organic compounds, heavy metals and dissolved ions, furans/dioxins, and nutrient loading in lake water, sediment, and biota (Preissler, et al., 1998; Bevans et al, 1996; Bevans et al., 1998; Covay and Leiker, 1998; LaBounty and Horn, 1997; Paulson, 1981). By contrast, little work has focused on the sediments in the lake and the processes of deposition (Gould, 1951). To address these questions, sidescan-sonar imagery and high-resolution seismic-reflection profiles were collected throughout Lake Mead by the USGS in cooperation with researchers from University of Nevada Las Vegas (UNLV). These data allow a detailed mapping of the surficial geology and the distribution and thickness of sediment that has accumulated in the lake since the completion of Hoover Dam. Results indicate that the accumulation of post-impoundment sediment is primarily restricted to former river and stream beds that are now submerged below the lake while the margins of the lake appear to be devoid of post-impoundment sediment. The sediment cover along the original Colorado River bed is continuous and is typically greater than 10 m thick through much of its length. Sediment thickness in some areas exceeds 35 m while the smaller tributary valleys typically are filled with less than 4 m of sediment. Away from the river beds that are now covered with post-impoundment sediment, pre-impoundment alluvial deposits and rock outcrops are still exposed on the lake floor.
This GIS (ESRI) grid represents the integration swath bathymetry, on land DEM, and underwater surface derived from countour maps generated pre-impoundment.
Questions regarding the swath bathymetry portion of this dataset should be directed to Steve Belew, while questions regarding the remainder of the dataset and the integration should be directed to VeeAnn Cross.
1930
200111
ground condition
None planned
-114.996607
-114.003332
36.747197
35.758068
USGS Metadata Identifier
USGS:edfee35a-756c-45b2-bdf6-ed1a0f69f8c0
None
ArcView
bathymetry
CMGP
Coastal and Marine Geology Program
DEM
digital elevation model
grid
images
lake
mosaic
OFR03-320
Open-File Report
reservoir
U.S. Geological Survey
USGS
Woods Hole Field Center
Bureau of Reclamation
ISO 19115 Topic Category
inlandWaters
geoscientificInformation
imageryBaseMapsEarthCover
elevation
USGS Thesaurus
topography
lakebed characteristics
bathymetry
None
Arizona
Black Canyon
Boulder Basin
Colorado River
Gregg Basin
Hoover Dam
Iceberg Canyon
Lake Mead
Las Vegas
Las Vegas Bay
Las Vegas Wash
Mohave Desert
Nevada
Overton Arm
United States
Virgin Basin
North America
NONE
The U.S. Geological Survey and Bureau of Reclamation must be referenced as the originator of the dataset in any future products or research derived from these data.
Steve Belew
Bureau of Reclamation
GIS Specialist
mailing address
P.O. Box 61470
Boulder City
NV
89006-1470
sbelew@usbr.gov
(702) 293-8150
Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog 8.2.0.700
H.E. Bevans
S.L. Goodbred
J.F. Miesner
S.A. Watkins
T.S. Gross
N.D. Denslow
T. Choeb
1996
Synthetic organic compounds and carp endrocrinology and histology, Las Vegas Wash and Las Vegas and Callville bays of Lake Mead Nevada
Water-Resources Investigations
96-4266
Reston, VA
U.S. Geological Survey
H.E. Bevans
M.S. Lico
S.J. Lawrence
1998
Water quality in the Las Vegas Valley area and the Carson and Truckee River basins, Nevada and California, 1992-1996
Circular
1170
Reston, VA
U.S. Geological Survey
K.J. Couvay
T.J. Leiker
1998
Synthetic organic compounds in water and bottom sediment from streams, detention basins, and sewage-treatment plant outfalls in Las Vegas Valley, Nevada, 1997
Open-File Report
98-633
Reston, VA
U.S. Geological Survey
H.R. Gould
1951
Some quantitative aspects of Lake Mead turbidity currents
SEPM Special Publication
No. 2
Tulsa, OK
Society of Economic Paleontologists and Mineralogists
J.F. LaBounty
M.J. Horn
1997
The influence of drainage from the Las Vegas Valley on the limnology of Boulder Basin, Lake Mead, Arizona-Nevada
Journal of Lake and Reservoir Management
v. 13
L.J. Paulson
1981
Nutrient management with hydroelectric dams on the Colorado River
Technical Report
#8
Department of Biological Sciences, University of Nevada, Las Vegas, Nevada
Lake Mead Limnological Research Center
A.M. Preissler
G.A. Roach
K.A. Thomas
J.W. Wilson
1998
Water resources data, Nevada, water year 1998
Water Resources Data Nevada
NV-98-1
Reston, VA
U.S. Geological Survey
The nature of combining three different datasets tends to reduce the overall accuracy. Therefore a nominal accuracy of 50-100m is assigned to this dataset.
This surface represents the integration of three datasets. One is the swath bathymetry data collected in Lake Mead in November of 2001. The second dataset is the on land DEM acquired from the NED (National Elevation Dataset) project. And the final dataset is the surface generated from pre-impoundment elevation contours as digitized from DRG's of Lake Mead (digital raster graphics). Due to the nature of combining these three different datasets, discrepancies are evident at the bounds of each of the datasets.
This dataset is complete.
Three sets of data were acquired. The DEM from the area surrounding Lake Mead was acquired from NED (National Elevation Dataset) in 1998. This data was available as 30m/pixel. The swath bathymetry data was collected in Lake Mead during the fall of 2001. Bureau of Reclamation had this data at a very high resolution. The area covered by this surveying is effectively limited to the areas of post-impoundment sediment. The underwater contours available from the DRG's (digital raster graphics) were digitized. These contours were then used to create an underwater surface using the ESRI topogrid command available in Arc/Info. This surface was created with a 10 m/pixel resolution.
unknown
The lake bounds shapefile was used to clip the DEM dataset such that all values falling within the lake bounds were turned to NODATA values.
unknown
The lake bounds shapefile was used to clip the topogrid dataset such that all values falling outside the lake bounds were turned to NODATA values.
unknown
The high-resolution bathymetry data was resampled to a 10 m cellsize using bilinear interpolation.
unknown
The swath bathymetry grid was merged with the topogrid surface such that where swath bathymetry data was available, the topogrid surface was overwritten. This provided the present day lakefloor of Lake Mead.
unknown
The on land DEM was resampled to a 10 m cellsize grid (super sampling).
unknown
This supersampled on land DEM was then combined with the lake floor surface.
unknown
The resulting surface then underwent several repetitions of a 4x4 focal mean filtering to remove and null data values and to smooth the transition from one dataset to the next.
unknown
Edits to the metadata were made to fix any errors that MP v 2.9.36 flagged. This is necessary to enable the metadata to be successfully harvested for various data catalogs. In some cases, this meant adding text "Information unavailable" or "Information unavailable from original metadata" for those required fields that were left blank. Other minor edits were probably performed (title, publisher, publication place, etc.). Added online links to the data in the identification section and the distribution section and also a link to the larger work citation. Added ISO 19115 Topic Category keywords. The standard order process section in the Distribution section was incomplete and had to be modified to meet the standard. The metadata date (but not the metadata creator) was edited to reflect the date of these changes. The metadata available from a harvester may supersede metadata bundled within a download file. Compare the metadata dates to determine which metadata file is most recent.
20170330
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
USGS Thesaurus keywords added to the keyword section.
20180720
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
Crossref DOI link was added as the first link in the metadata.
20191118
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
Added keywords section with USGS persistent identifier as theme keyword.
20200908
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
Raster
Grid Cell
10759
8654
1
Universal Transverse Mercator
11
0.999600
-117.000000
0.000000
500000.000000
0.000000
row and column
10.000000
10.000000
meters
North American Datum of 1983
Geodetic Reference System 80
6378137.000000
298.257222
VeeAnn A. Cross
U.S. Geological Survey
Marine Geologist
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
(508) 548-8700 x2251
(508) 457-2310
vatnipp@usgs.gov
Downloadable Data
These data were prepared by an agency of the United States Government. Neither the United States government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States government or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States government or any agency thereof. Although all data published in this report have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and related materials and/or the functioning of the software. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of this data, software, or related materials.
AAIGrid
Zip file containing the Esri ascii grid.
356.792
https://pubs.usgs.gov/of/2003/of03-320/data/surfaces/utm11/presentday.zip
none
20240318
VeeAnn A. Cross
U.S. Geological Survey
Marine Geologist
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
(508) 548-8700 x2251
(508) 457-2310
whsc_data_contact@usgs.gov
The metadata contact email address is a generic address in the event the person is no longer with USGS. (updated on 20240318)
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
local time