From the national Societies: Australasian Hydrographic Society01/01/2007 |
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| Archive > January 2007, Volume 11, number 1 > From the national Societies: Australasian Hydrographic Society |
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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.
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| 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 |
