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This data has achieved Bronze level on 22 October 2015 which means this data makes a great start at the basics of publishing open data.
Elevation contour lines for Lake McConaughy, Nebraska
Summary
- Type of release
- ongoing release of a series of related datasets
- Data Licence
- Not Applicable
- Content Licence
- Creative Commons CCZero
- Verification
- automatically awarded
- Release Date
- 2 September 2014
- Modified Date
- 17 November 2014
- Update Frequency
- notPlanned
- Publishers
- U.S. Geological Survey, Department of the Interior
- Identifier
- elevation-contour-lines-for-lake-mcconaughy-nebraska
- Landing Page
- http://catalog.data.gov/dataset/elevation-contour-lines-for-lake-mcconaughy-nebraska
- Temporal Coverage
- 1 December 2002 — 1 August 2003
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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.
General Information
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This data is described at
http://catalog.data.gov/dataset/elevation-contour-lines-for-lake-mcconaughy-nebraska Do you think this data is incorrect? Let us know
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This data is published by
U.S. Geological Survey, Department of the Interior Do you think this data is incorrect? Let us know
Legal Information
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The rights statement is at
http://catalog.data.gov/dataset/elevation-contour-lines-for-lake-mcconaughy-nebraska Do you think this data is incorrect? Let us know
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Outside the US, this data is available under
Creative Commons CCZero Do you think this data is incorrect? Let us know
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There are
yes, and the rights are all held by the same person or organisation Do you think this data is incorrect? Let us know
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The content is available under
Creative Commons CCZero Do you think this data is incorrect? Let us know
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This data contains
no data about individuals Do you think this data is incorrect? Let us know
Practical Information
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The data appears in this collection
http://catalog.data.gov/organization/usgs-gov Do you think this data is incorrect? Let us know
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This data changes
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The data is
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Technical Information
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Releases of this data are listed at
http://catalog.data.gov/api/rest/package/elevation-contour-lines-for-lake-mcconaughy-nebraska Do you think this data is incorrect? Let us know
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The format of this data is
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Find out how to contact someone about this data at
http://catalog.data.gov/dataset/elevation-contour-lines-for-lake-mcconaughy-nebraska Do you think this data is incorrect? Let us know
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Find out how to suggest improvements to publication at
http://www.data.gov/issue/?media_url=http://catalog.data.gov/dataset/elevation-contour-lines-for-lake-mcconaughy-nebraska Do you think this data is incorrect? Let us know