Nevada Water Science Center

Multimedia

Select NVWSC photos are available below. For additional photos of NVWSC science, follow our social media accounts: @USGS_Nevada and USGS Science in Nevada.

Filter Total Items: 56
July 29, 2019

Surveying High-Water Marks and Cross-Sections for Indirects

This video describes how to survey high-water marks and cross-sections for indirect measurements. Included are tips and tricks for getting across non-wadeable sections of the stream.
 

July 29, 2019

Selection of Roughness Coefficients

This video describes the field selection of roughness coefficients, or Manning's "n" values. Both the comparative (photos) and analytical (Cowan's) methods are discussed.
 

July 29, 2019

Plotting High-Water Marks in the Field Using SAC-GUI

This video describes how to use SAC-GUI in the field to plot high-water mark profiles. Plotting high-water marks in the field is required for most indirect measurement techniques
 

July 26, 2019

Theory of the Slope-Area Method

This video covers the theory behind a slope-area indirect measurement, the most common type of indirect measurement used in the USGS. 
 

July 26, 2019

Surveying Slope-Area Measurements

This video goes into detail about where to flag high-water marks and how to survey a slope-area measurement. A simple one-setup Total Station survey is demonstrated.

July 8, 2019

Survey Requirements for Critical Depth Indirect Measurements

This video describes the high-water marks needed along with cross-section locations for critical depth indirect measurements. Critical depth computations are those performed when flow goes through a critical flow regime at a drop, such as at a waterfall. 
 

July 2, 2019

Survey Requirements for Culvert Indirect Measurements - Culvert Survey

This video describes the survey requirements for culvert indirect measurements, specifically how to measure various aspects of the culvert itself. This video provides a general overview of how to survey culvert attributes, such as the invert and length.
 

June 30, 2019

Survey Requirements for Non-Standard Culverts

This video discusses how to measure various aspects of non-standard culverts, such as mitered culverts. Using the slope-area method inside a culvert is also discussed. 
 

June 30, 2019

Surveying Indirect Measurements with GNSS

This video details how to survey indirect measurements with GNSS. Both RTN and RTK setups are discussed, along with tips and tricks and troubleshooting.
 

June 25, 2019

Survey Requirements for Culvert Indirect Measurements - Overview

This video describes the survey requirements for culvert indirect measurements, including high-water mark and cross-section locations. 
 

June 24, 2019

Survey Requirements for Pipe Culverts

This video demonstrates how to measure various aspects of pipe and pipe-arch culverts for culvert indirect measurements. The video includes tips and tricks for measuring the geometry, corrugations, and entrance types including rounded or beveled entrances.
 

June 21, 2019

Surveying Slope-Conveyance Indirect Measurement

This video shows how to survey a slope-conveyance indirect measurement using a conventional optical or digital level.