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Archive > January/February 2005, Volume 9, Number 1 > Hydrographic Society Denmark

Hydrographic Society Denmark

  01/01/1970
Hugo Meister

News
Still waiting?
Take up the challenge use the opportunity and sent your member input on any subject to us by mail to mail@hydrosoc.dk, and your input will be in the coming issue.

Local News
Corporate members
It is now free to get your logo on our Web page! Contact HSD.

All members
Admissions to HSD unchanged for 2003. Online at HSD home page (the front page). Remember only DKK 200 per year for individual members (equivalent to approx. e35 or US$23)

Update our mailing list
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Submit a mail to mail@hydro soc.dk with your home address and your mail address.

Workshops
Coming workshops to be announced on our home page or directly by mail.

Contact
Hydrographic Society, Denmark
Att. Hugo Meister
Teglbaekvej 8-10
DK-8361 Hasselager-Aarhus
Denmark.
T: +45 8628 2011
F: +45 8628 2111
HSD
E: mail@hydrosoc.dk
W: www.hydrosoc.dk




     


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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

 

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