Field Activity ER111WA

Identifier ER111WA
Alternate names E-R1-11-WA
Purpose Repeat topographic surveys of sample transects. Conduct photographic transects on river bars.
Description United States Geological Survey, Pacific Science Center. Chief Scientist: Amy Draut. Topographic surveys, grain size measurements data of field activity E-R1-11-WA in Elwha River, WA from 04/08/2011 to 04/15/2011
Location WA
Summary Data on FAD
Info derived Grain size of river sediments prior to dam removal.
Comments Staff information imported from InfoBank Amy Draut (USGS) - Chief Scientist Mark Mastin (Surveyor, USGS) - Hydrologist Josh Logan (Information Specialist, USGS) - Geographer
Platform
on foot
survey conducted on foot
Itinerary
Start Port Angeles, WA 2011-04-08
End Port Angeles, WA 2011-04-15
Bounds
West -127.75
East -116.25
North 49.75
South 45.25
Activity Topographic surveys, grain size measurements

Personnel

Organization
2885 Mission Street
Santa Cruz, CA95060
(831) 460-7401
Principal investigators Draut, AmyAmy East
Crew members
Joshua Logan
Scientist, Staff
Information specialist(s)
Joshua Logan
Specialist, Information
Affiliate staff Mark Mastin (Surveyor, USGS) - Hydrologist

Data types and categories

Data category: Imagery, Location-Elevation
Data type: Photo, Transects

Equipment used

Equipment Usage description Data types Datasets
Total Station Benchmarks, Profiles, Transects 1
CobbleCam Photo (no data reported)

Datasets


Datasets compiled from multiple sources

Dataset name Equipment Description Dataset contact
River-channel topography on the Elwha River, Washington, 2006 to 2017 Total Station This portion of the data release presents topographic data collected at 5 study sites along Elwha River, Washington between 2006 and 2017. Elevations along channel-perpendicular transects were surveyed using a total station and prism rod. Initial geodetic control was established using static global positioning system (GPS) occupations. A total station was subsequently used to expand and maintain the survey control network at each site. All survey data were referenced to the NAD83 datum, using the UTM, zone 10, coordinate reference system. All elevations were referenced to the NAVD88 vertical datum. Based on repeat measurements of points with known positions, we estimated the horizontal and vertical accuracy of the topographic measurements to be within 2 to 3 cm. Topographic data were collected using a total station using survey layout routines to locate data along the same transects during each survey. Wetted portions of the channel were measured primarily by wading with the survey rod. In several locations where wading was not feasible due to water depth, measurements were not taken or they were made by swimming with the survey rod or by deploying the survey rod from an inflatable kayak (necessary in the thalweg of reach 3 between 2006 and 2011). Although the focus of the surveys was to make repeated measurements of elevations along a transect, some additional topographic measurements were within the reaches off of the transects. Additionally, a small side channel within reach 2 was surveyed from 2006 to 2008 along transects perpendicular to that channel and along the channel's thalweg. Two series of figures are provided to aid with visualizing the channel cross-section data. The first series, labeled "Elwha_CrossSectionPlots_FallSurveys_*.png", shows the channel cross-section profiles from the annual fall surveys, plotted for each transect and each reach. The second series, labeled "Elwha_CrossSectionPlots_Grid_FallSurveys_*.png", shows the channel cross-section profiles from the annual fall surveys for each reach, with each survey date and transect on a separate set of axes to provide a better means of viewing cross-section changes between survey dates (note that Reach 1B was not plotted this way because it was surveyed less frequently). Amy East

Publications

Samples collected during this field activity