Hydro International receives many requests for the placement of event announcements. To make it easier for you to publicise events, why not submit details for the calendar on this website? Webinars now have their own category.
Submissions are easy: at the events listing you will find the option 'Submit your event', where you can complete details on a form. Each time a submission is received the editors will be alerted to the fact that a new event has been added, and will publish it as soon as possible.
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.
