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Archive > January 2007, Volume 11, number 1 > From the national Societies: Hydrographic Society Denmark

From the national Societies: Hydrographic Society Denmark

  01/01/2007
Hydrographic Societies
New Input
Take up the challenge, use the opportunity and send your member input on any subject to us by email: mail@hydrosoc.dk

Local News
Corporate members
It is now free to get your logo on our Website. Please contact HSD.

All members
Admission fee to HSD unchanged for 2006. Online at HSD home page. Only DKK 200 per year for individual members.
Update our mailing list. Have you been updating your mail address recently
Submit a mail to: mail@hydrosoc.dk with your home address and your e-mail address.

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

Contact
Hydrographic Society Denmark
Att.: Henning Pedersen
Jegstrupvej 54
DK 8361 Hasselager-Aarhus
Denmark
Tel: +45 - 8734 3624
Fax: +45 - 8628 8266
Mail: hpe@reson.dk

HSD
Email: mail@hydrosoc.dk
References
http://www.hydrosoc.dk




     


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Hydrographic Survey for Riverbed Erosion

 

U.S. Geological Survey were 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 analyzes 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. 

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

 

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