Featured Research

from universities, journals, and other organizations

Satellites Measure "Bouncing" Landscapes

Date:
October 24, 2001
Source:
University Of Newcastle Upon Tyne
Summary:
Life really does have its ups and downs. Some parts of Europe and America, for example, can rise and fall by as much as 10 cm every day. Now, scientists at the University of Newcastle upon Tyne in England are using satellite technology to produce the first national map of ‘bounce’ to help civil engineers make ends meet when they build bridges, dams and tunnels.

Life really does have its ups and downs. Some parts of Europe and America, for example, can rise and fall by as much as 10 cm every day. Now, scientists at the University of Newcastle upon Tyne in England are using satellite technology to produce the first national map of ‘bounce’ to help civil engineers make ends meet when they build bridges, dams and tunnels.

Britain is the first country in the world to begin such a project which, when completed, could make surveying ten times more accurate and allow big savings on large construction projects. The ‘bounce’ is caused by the tides. As the weight of water increases on the continental shelf around Britain’s coastline, the whole country sinks a little into the earth’s crust, rebounding as the tide recedes.

The problem for engineers is that the land does not sink evenly, resulting in local distortions which cause inaccuracies when satellite surveying techniques are used in construction projects.

Dr. Peter Clarke, of the Department of Geomatics at the University of Newcastle, is leading a research team which is using orbiting U.S. satellites to monitor the positions, with an accuracy of a millimetre or two, of more than 30 Global Positioning System (GPS) receivers located all over Britain. It should then be possible to estimate the ‘bounce factor’ in any part of Britain at any time of day.

Although ‘bounce’ has previously been measured in certain locations by similar techiques in the USA and some other countries, none has produced an accurate and comprehensive national map. The project, which should be completed by Autumn 2004, has received 64,000 in funding from the Natural Environment Research Council and also involves the Proudman Oceanographic Laboratory and Ordnance Survey, with help from the National GPS Archive at Nottingham University.

Dr. Clarke said: "The phenomenon has been known about for some time but it has only become necessary to measure these movements because of the increasing use of precise satellite surveying by civil engineers.

"For example, a great deal of time and money was spent during the construction of the Channel Tunnel to ensure that the two halves met in the middle at the right height. A few centimetres difference would have proved very costly to put right.

"The same principal applies to other large construction projects such as railways, dams and bridges.

"Our measurements will be used to adjust the data obtained by surveying to produce results which are perhaps ten times more accurate — to within millimetres rather than centimetres. This could significantly reduce the cost of large construction projects."


Story Source:

The above story is based on materials provided by University Of Newcastle Upon Tyne. Note: Materials may be edited for content and length.


Cite This Page:

University Of Newcastle Upon Tyne. "Satellites Measure "Bouncing" Landscapes." ScienceDaily. ScienceDaily, 24 October 2001. <www.sciencedaily.com/releases/2001/10/011024073341.htm>.
University Of Newcastle Upon Tyne. (2001, October 24). Satellites Measure "Bouncing" Landscapes. ScienceDaily. Retrieved September 18, 2014 from www.sciencedaily.com/releases/2001/10/011024073341.htm
University Of Newcastle Upon Tyne. "Satellites Measure "Bouncing" Landscapes." ScienceDaily. www.sciencedaily.com/releases/2001/10/011024073341.htm (accessed September 18, 2014).

Share This



More Earth & Climate News

Thursday, September 18, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: Scientists Examine Colossal Squid

Raw: Scientists Examine Colossal Squid

AP (Sep. 16, 2014) Squid experts in New Zealand thawed and examined an unusual catch on Tuesday: a colossal squid. It was captured in Antarctica's remote Ross Sea in December last year and has been frozen for eight months. (Sept. 16) Video provided by AP
Powered by NewsLook.com
Man Floats for 31 Hours in Gulf Waters

Man Floats for 31 Hours in Gulf Waters

AP (Sep. 16, 2014) A Texas man is lucky to be alive after he and three others floated for more than a day in the Gulf of Mexico when their boat sank during a fishing trip. (Sept. 16) Video provided by AP
Powered by NewsLook.com
Researchers Explore Shipwrecks Off Calif. Coast

Researchers Explore Shipwrecks Off Calif. Coast

AP (Sep. 16, 2014) Federal researchers are exploring more than a dozen underwater sites where they believe ships sank in the treacherous waters west of San Francisco in the decades following the Gold Rush. (Sept. 16) Video provided by AP
Powered by NewsLook.com
Isolated N. Korea Asks For International Help With Volcano

Isolated N. Korea Asks For International Help With Volcano

Newsy (Sep. 16, 2014) Mount Paektu volcano in North Korea is showing signs of life and there's not much known about it. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins