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| Open-File Report 2006-1284 |
Prepared in cooperation with the Southern Nevada Water Authority
and the Bureau of Reclamation
By Ryan C. Rowland, Craig L. Westenburg, Ronald J. Veley, and Walter E. Nylund
Water-quality profile data were collected in Las Vegas Bay and near Sentinel Island in Lake Mead, Arizona and Nevada, from October 2000 to September 2004. The majority of the profiles were completed with automatic variable-buoyancy systems equipped with multiparameter water-quality sondes. Profile data near Sentinel Island were collected in August 2004 with an automatic variable-depth-winch system also equipped with a multiparameter water-quality sonde. Physical and chemical water properties collected and recorded by the profiling systems, including depth, water temperature, specific conductance, pH, dissolved-oxygen concentration, and turbidity are listed in tables and selected water-quality profile data are shown in graphs.
Abstract
Introduction
Purpose and Scope
Equipment
Profiling Systems
System Maintenance
Methodology
Data Collection
Data Processing
Records Computation
References Cited
1. Map showing profiling system locations in Las Vegas Bay and near Sentinel Island, Boulder Basin, Lake Mead, Arizona and Nevada
2. Map showing profiling system locations in Las Vegas Bay, Lake Mead, Arizona and Nevada
3. Graph showing Lake Mead elevation during period of data collection
4. Schematic diagram of variable-buoyancy-profiling system
5. Photos of variable-depth-winch system components mounted to a t-frame
6. Data processing flowchart for automatic-profile data
7. Plots of physical and chemical water-quality properties in selected profiles recorded at Las Vegas Bay site 1, Lake Mead, Arizona and Nevada
8. Plots of physical and chemical water-quality properties in selected profiles recorded at Las Vegas Bay site 2, Lake Mead, Arizona and Nevada
9. Plots of physical and chemical water-quality properties in selected profiles recorded at Las Vegas Bay site 3, Lake Mead, Arizona and Nevada
10. Plots of physical and chemical water-quality properties in selected profiles recorded at Sentinel Island site, Lake Mead, Arizona and Nevada
1. Location and period of operation for the Las Vegas Bay and Sentinel Island water-quality profiling systems
2. Calibration criteria for sensors used to measure physical and chemical water-quality properties in profiles at Las Vegas Bay and near Sentinal Island, Lake Mead, Arizona and Nevada
3. Manufacturer specifications for sensors used to measure physical and chemical water-quality properties in profiles in Las Vegas Bay and near Sentinel Island, Lake Mead, Arizona and Nevada
4. Station identification number, station name, and period of record for automatic-profile site target depths, Lake Mead, Arizona and Nevada
5. Maximum allowable limits for applying data corrections to near-continuous water-quality data
6. Criteria for rating near-continuous water-quality data
7. Data quality ratings for physical and chemical water-quality properties measured in profiles at Las Vegas Bay and Sentinel Island sites, Lake Mead, Arizona and Nevada
12. Total water depth measured at Las Vegas Bay sites and at Sentinel Island site, Lake Mead, Arizona and Nevada
Send questions or comments about this report to the author, Ron J. Veley
For more information about USGS activities in Nevada, visit the USGS Nevada Water Science Center home page.
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Persistent URL: http://pubsdata.usgs.gov/pubs/of/2006/1284/index.htm Page Contact Information: Publications Team Last modified: Saturday, 12-Jan-2013 22:16:45 EST |
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