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Hydro International is looking for hydrographic professionals who like to share their experiences from time to time with the world in a blog on this website.

Hydro International is looking for hydrographic professionals who like to share their experiences from time to time with the world. You can make your own articles, images and let the world know about what is moving you. Would you like to contribute to the Hydro International website and do you have ideas? Please e-mail your background, a short description of which area you are working in (geographically and professionally) and what you like to write about to content manager Joost Boers.

 

 
Joost Boers
joost.boers@geomares.nl
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Hydrographic Survey of Riverbed Erosion

Members of the US Geological Survey were filmed while out on the Missouri River at Williston, North Dakota, USA, performing a hydrographic survey to monitor the state of riverbed erosion. They were using a multibeam echo sounder which transmits sound energy and analyses the return signal (echo) that has bounced off the riverbed or other objects. Multibeam sonars emit sound waves from directly beneath a ship's hull to produce fan-shaped coverage of the riverbed. 


Gauge height at the Williston gauge was approximately 27.65 feet when this video was taken. Additional information about the USGS streamgauge at Williston is available at http://waterdata.usgs.gov/nd/nwis?program=nwisman&site_no=06330000

 

 Last 5 items:
 Hydrographic Survey of Riverbed Erosion
 Introduction to GEBCO
 MCA on Surveying the British Coast
 Surveying in the Port of London
 Venessa O'Connell on Hydrography
 
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