Skip to main content
U.S. flag

An official website of the United States government

Field survey methods

Detailed Description

Photos of survey equipment used during surveys of the Elwha River delta, Washington, from 2010-2017, showing:

A, personal watercraft,
B, kayak each equipped with global navigation satellite system (GNSS) receivers and single-beam echosounders,
C, GNSS receiver mounted on a backpack,
D, GNSS base station,
E, collection of surface sediment sample with a grab sampler, and
F, sampling sediment from a grab sample. 


Public Domain.

USGS data release
Bathymetry, topography, and sediment grain-size data from the Elwha River delta, Washington