Dataset Identification:
Resource Abstract:
- description: The U.S. Geological Survey, in cooperation with The Central Nebraska Public Power and Irrigation District (CNPPD),
conducted a study that used bathymetric and topographic surveying in conjunction with Geographical Information Systems techniques
to determine the 2003 physical shape and storage capacity, as well as the change in storage capacity of Lake McConaughy that
occurred over 62 years. By combining the bathymetric and topographic survey data, the 2003 surface area of Lake McConaughy
was determined to be 30,413.0 acres, with a volume of 1,756,300 acre-feet at the lake conservation-pool elevation of 3,266.4
feet above North American Vertical Datum of 1988 (3,265.0 feet above CNPPD datum). To determine the changes in storage of
Lake McConaughy, the 2003 survey Digital Elevation Model (DEM) was compared to a preconstruction DEM compiled from historical
contour maps. This comparison showed an increase in elevation at the dam site due to the installation of Kingsley Dam. Immediately
to the west of the Kingsley Dam is an area of decline where a borrow pit for Kingsley Dam was excavated. The comparison of
the preconstruction survey to the 2003 survey also was used to estimate the gross storage capacity reduction that occurred
between 1941 and 2002. The results of this comparison indicate a gross storage capacity reduction of approximately 42,372
acre-feet, at the lake conservation-pool elevation of 3,266.4 feet in NAVD 88 (3,265.0 feet in CNPPD datum). By comparing
preconstruction and 2003 survey data and subtracting the Kingsley Dam and borrow pit, the total estimated net volume of sediment
deposited from 1941 to 2003 was 53,347,124 cubic yards, at an annual average rate of 860,437 cubic yards per year. The approximate
decrease in the net storage capacity from 1941 to 2003 was 33,066 acre-feet, at an annual average decrease of approximately
533 acre-feet per year, which resulted in a 1.8 percent decrease in storage capacity of Lake McConaughy. The lake accumulated
most of the sediment in the original river channel and in the west end of the delta area on the upstream end of the lake.;
abstract: The U.S. Geological Survey, in cooperation with The Central Nebraska Public Power and Irrigation District (CNPPD),
conducted a study that used bathymetric and topographic surveying in conjunction with Geographical Information Systems techniques
to determine the 2003 physical shape and storage capacity, as well as the change in storage capacity of Lake McConaughy that
occurred over 62 years. By combining the bathymetric and topographic survey data, the 2003 surface area of Lake McConaughy
was determined to be 30,413.0 acres, with a volume of 1,756,300 acre-feet at the lake conservation-pool elevation of 3,266.4
feet above North American Vertical Datum of 1988 (3,265.0 feet above CNPPD datum). To determine the changes in storage of
Lake McConaughy, the 2003 survey Digital Elevation Model (DEM) was compared to a preconstruction DEM compiled from historical
contour maps. This comparison showed an increase in elevation at the dam site due to the installation of Kingsley Dam. Immediately
to the west of the Kingsley Dam is an area of decline where a borrow pit for Kingsley Dam was excavated. The comparison of
the preconstruction survey to the 2003 survey also was used to estimate the gross storage capacity reduction that occurred
between 1941 and 2002. The results of this comparison indicate a gross storage capacity reduction of approximately 42,372
acre-feet, at the lake conservation-pool elevation of 3,266.4 feet in NAVD 88 (3,265.0 feet in CNPPD datum). By comparing
preconstruction and 2003 survey data and subtracting the Kingsley Dam and borrow pit, the total estimated net volume of sediment
deposited from 1941 to 2003 was 53,347,124 cubic yards, at an annual average rate of 860,437 cubic yards per year. The approximate
decrease in the net storage capacity from 1941 to 2003 was 33,066 acre-feet, at an annual average decrease of approximately
533 acre-feet per year, which resulted in a 1.8 percent decrease in storage capacity of Lake McConaughy. The lake accumulated
most of the sediment in the original river channel and in the west end of the delta area on the upstream end of the lake.
Citation
- Title Elevation contour lines for Lake McConaughy, Nebraska.
-
- creation Date
2018-05-21T10:33:45.997612
Resource language:
Processing environment:
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Metadata data stamp:
2018-08-06T21:36:13Z
Resource Maintenance Information
- maintenance or update frequency:
- notes: This metadata record was generated by an xslt transformation from a dc metadata record; Transform by Stephen M. Richard, based
on a transform by Damian Ulbricht. Run on 2018-08-06T21:36:13Z
Metadata contact
-
pointOfContact
- organisation Name
CINERGI Metadata catalog
-
- Contact information
-
-
- Address
-
- electronic Mail Address cinergi@sdsc.edu
Metadata language
eng
Metadata character set encoding:
utf8
Metadata standard for this record:
ISO 19139 Geographic Information - Metadata - Implementation Specification
standard version:
2007
Metadata record identifier:
urn:dciso:metadataabout:3e55d49e-d370-40c0-838a-379c45f0ad82
Metadata record format is ISO19139 XML (MD_Metadata)