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Taking a channel measurement

By New England Water Science Center
USGS employee stands in the river with a prism while a point measurement is taken with a station located on the river bank.
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Detailed Description

Surface-water modeling for Federal Emergency Management Agency flood insurance rate maps. 

​A USGS employees stands in the river channel keeping a prism on a survey rod level while a point measurement is taken with a total station located on the river bank.​

Sources/Usage

Public Domain.