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Archive > December 2009, Volume 13, Number 10 > Development

Development

  29/12/2009
Raj S. Chakravorty, hydrographic surveyor, Indian Navy (retd)

I remember we had a paragraph for reporting such things as the sighting of whales or turtles. Sometimes I would insert a small paragraph that would go something like: "This remote beach is frequented by turtles. On a particular dark moonless night, thousands of the small ones crack open their eggs and scramble over the sands into the warm sea.
It happens before their predators realise."

 

Consider a world where there are golden beaches with beautiful patterns created by the waves. You can bend down, take a fistful of sand and feel the clean grains streaming through your fingers.

 

If you lift your gaze you can see the azure sky afar, where it meets the sea at the horizon. The world looks like an impossible painting done by a child using bold colours. You cannot detect any movement or sign of life. But you know there's a vibrant world hidden within.

 

You are privileged to share the beach with the olive ridley and leatherback turtles. They don't come often. Sometimes after a stormy night you will find them frolicking on the sea with the dolphins, having re-claimed the waves.

 

Once I gazed at them from a helicopter hovering vertically above them. From up there they looked like a large swarm of bedbugs, thousands of them. They have been playing this game for centuries. The next years are going to be tough, though. Their idyllic world is threatened by development.

 

Close by, a modern port is being built, the construction of which will destroy the turtles' habitat forever.

 

"Can't they go somewhere else? I'm sure they will find themselves another place to breed and frolic. Anyway it's not that important. A few dead turtles won't shake up this Earth. After all, you can't stop development. We've to make our fortunes and spend it before we grow old and die."

 

 

References
http://www.hydro-international.com/weblog




     


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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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