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Bathymetric and geophysical surveys of Englebright Lake, Yuba-Nevada Counties, California

Metadata also available as - [Questions & Answers] - [Parseable text] - [DIF]

Metadata:

Identification_Information
Data_Quality_Information
Spatial_Reference_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Jonathan R. Childs

Originator: Noah P. Snyder

Originator: Margaret A. Hampton

Publication_Date: 2003

Title:

Bathymetric and geophysical surveys of Englebright Lake, Yuba-Nevada Counties, California

Geospatial_Data_Presentation_Form:

text report containing graphical map images (no direct spatial referencing)

Series_Information:

Series_Name: U.S. Geological Survey Open-File Report
Issue_Identification: 03-383

Online_Linkage: <http://geopubs.wr.usgs.gov/open-file/of03-383/>

Description:

Abstract:: A new bathymetric map of Englebright Lake, Yuba-Nevada Counties, California is compared to 1939 elevations captured from a pre-dam topographic survey to determine how much sediment has accumulated in the reservoir in the past 60 years. A longitudinal profile along the entire length (thalweg) of the reservoir and cross-sections across the reservoir at seven points illustrate the pre-dam and present bottom profiles. Calculations of the total volume of sediment impounded by the dam for eight regions of the reservoir are presented.
Purpose:: These data are intended for science researchers, policy makers, and the general public.
Supplemental_Information:: Information for USGS Coastal and Marine Geology related activities are online at: <http://walrus.wr.usgs.gov/>

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20010501
Ending_Date: 20010530

Currentness_Reference: ground condition

Status:

Progress: Complete
Maintenance_and_Update_Frequency: none planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -121.28333
East_Bounding_Coordinate: -121.19167
North_Bounding_Coordinate: +39.33333
South_Bounding_Coordinate: +39.23333

Keywords:

Theme:

Theme_Keyword_Thesaurus: none
Theme_Keyword: marine geology
Theme_Keyword: lake depth
Theme_Keyword: bathymetry
Theme_Keyword: reservoir
Theme_Keyword: sediment thickness
Theme_Keyword: isopach

Place:

Place_Keyword_Thesaurus: None
Place_Keyword: Englebright Lake
Place_Keyword: Englebright Reservoir
Place_Keyword: Harry L. Englebright Lake
Place_Keyword: Yuba River
Place_Keyword: Yuba County
Place_Keyword: Nevada County
Place_Keyword: California
Place_Keyword: USA

Place:

Place_Keyword_Thesaurus: Augmented FIPS 10-4 and FIPS 6-4, version 1.0
Place_Keyword: 06115 = Yuba
Place_Keyword: 06057 = Nevada

Access_Constraints: None

Use_Constraints:

These data are not intended for navigational purposes. Please recognize the U.S. Geological Survey (USGS) as the source of this information.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Jonathan R. Childs
Contact_Organization:: United States Geological Survey (USGS) Coastal and Marine Geology (CMG)

Contact_Position: Geophysicist

Contact_Address:

Address_Type: mailing and physical address
Address: USGS, MailStop 999, 345 Middlefield Road
City: Menlo Park
State_or_Province: CA
Postal_Code: 94025-3561
Country: USA

Contact_Voice_Telephone: (650) 329-5195

Contact_Electronic_Mail_Address: jchilds@usgs.gov

Browse_Graphic:

Browse_Graphic_File_Name: <http://geopubs.wr.usgs.gov/open-file/of03-383/figure1.gif>
Browse_Graphic_File_Description:: Planimetric map of the Upper Yuba River Watershed Studies Program (UYRSP) area. Small rectangle (in red) around Englebright Lake shows the geographic limits of the maps in this report. 968x774 pixels, 34k bytes.
Browse_Graphic_File_Type: GIF

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report: Data have not been independently verified.

Logical_Consistency_Report:

Approximately 18,500 depth points along the ship tracklines shown in Figure 2 were used to construct the surface of the reservoir floor. In the upstream end of the reservoir (on both the Yuba River and South Yuba River arms), the water was too shallow to survey. In each of these two areas, an artificial set of depth points (shown as green symbols in Figure 2) was estimated by linear interpolation along the river thalweg from the end of the boat survey to the point upstream on the pre-dam topographic map where the river bed elevation equals the dam spillway datum (160. 6 m, 527.0 feet). These irregular x,y,z data points were gridded at approximately 6 meter (20 foot) grid interval using the blockmedian and surface algorithms in Generic Mapping Tools. The blockmedian algorithm filters and grids the input (x,y,z) data using L1 norm, and surface creates a continuous curvature surface. A tension value 0.4 was used in the surface process. The resulting reservoir bathymetry is shown in <http://geopubs.wr.usgs.gov/open-file/of03-383/figure3.gif>

Completeness_Report:

A trackline map is shown at <http://geopubs.wr.usgs.gov/open-file/of03-383/figure2.gif>
Boat tracklines (in blue) along which reservoir depth (bathymetry) measurements were made. Cross symbols in the South Yuba River and northern reach of the Yuba River (in green) indicate points where water depth was extrapolated along the pre-dam thalweg for gridding purposes.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report: 1.0 meters

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:: One percent (1%) of the water depth for bathymetry; 10 feet for pre-dam topography and sediment thickness.

Lineage:

Process_Step:

Process_Description:

The bathymetry data were collected along continuous boat tracks at a 2 second sample interval. Pre-dam topography was digitized from archival survey records. Bathymetric and elevation models were created at 5-meter grid cell, and the models differenced to calculate sediment thickness and volume.

Process_Date: 20030810

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Jonathan R. Childs
Contact_Organization:: United States Geological Survey (USGS) Coastal and Marine Geology (CMG)

Contact_Position: Geophysicist

Contact_Address:

Address_Type: mailing and physical address
Address: USGS, MailStop 999, 345 Middlefield Road
City: Menlo Park
State_or_Province: CA
Postal_Code: 94025-3561
Country: USA

Contact_Voice_Telephone: (650) 329-5195

Contact_Electronic_Mail_Address: jchilds@usgs.gov

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Entity_and_Attribute_Information:

Overview_Description:

Entity_and_Attribute_Overview:: Geographic features (lake bathymetry, pre-dam topography, sediment thickness) are shown as color-contour map images at an unspecified projection and scale. These map images are rendered in Graphic Interchange Format (GIF).
Entity_and_Attribute_Detail_Citation: <http://geopubs.wr.usgs.gov/open-file/of03-383/>

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:: United States Geological Survey (USGS) Information Services

Contact_Address:

Address_Type: mailing and physical address
Address: Box 25286
City: Denver
State_or_Province: CO
Postal_Code: 80225
Country: USA

Contact_Voice_Telephone: 1-888-ASK-USGS

Resource_Description: USGS Open-File Report 03-383

Distribution_Liability:

Please recognize the U.S. Geological Survey (USGS) as the source of this information.
USGS-authored or produced data and information are in the public domain.
Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, these data and information are provided with the understanding that they are not guaranteed to be usable, timely, accurate, or complete. Users are cautioned to consider carefully the provisional nature of these data and information before using them for decisions that concern personal or public safety or the conduct of business that involves substantial monetary or operational consequences. Conclusions drawn from, or actions undertaken on the basis of, such data and information are the sole responsibility of the user.
Neither the U.S. Government nor any agency thereof, nor any of their employees, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any data, software, information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights.
Trade, firm, or product names and other references to commercial products and services are provided for information only and do not constitute endorsement or warranty, express or implied, by the USGS, USDOI, or U.S. Government, as to their suitability, content, usefulness, functioning, completeness, or accuracy.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: GIF
Format_Version_Number: 89a
Format_Information_Content:: Bathymetry, tracklines, pre-dam topography, and sediment thickness map images
File_Decompression_Technique: not otherwise compressed

Digital_Transfer_Option: