Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Modelling To Develop European Sand Dredging Guidelines

07.08.2002


Computer predictions of the effects of commercial sea-sand dredging on coastal erosion, produced by an international team headed by Dr Alan Davies of the University of Wales, Bangor`s School of Ocean Sciences, will play a key role in developing new European Guidelines for siting commercial sand dredging activities.



Increased demand for North Sea sand is anticipated, both for use as beach and sand dune nourishment and to meet demand for sand from large-scale European construction projects. Sand extraction can exacerbate coastal erosion if dredging activities are not properly sited.

Now, coastal oceanographers and engineers from 17 European leading institutes in & European countries have embarked on a major three year EU funded project, ‘SandPit` to assess what effects sand dredging may have on the sea bed ecosystems and surrounding coastlines and to develop European guidelines for sand dredging based on the optimum size, sea depth and distance from shore of any large scale commercial sand mining operation.


The SandPit project will assess the recovery time scales for the ecosystem surrounding dredging activities, and will gauge the critical depth at which sand mining has no measurable effect on the shoreline. This will be done by dredging a full-size in the North Sea. The pit will be closely monitored to measure what happens in the immediate vicinity once the sand is extracted, to see how the ecosystem recovers and to measure any changes to the adjacent coastline. These measurements will be compared to the predications currently available, and existing computer models will be improved as necessary.

Dr Alan Davies of the School of Ocean Sciences, a coastal oceanographer with more than 20 years` experience in the physical processes of sand movement, will lead the modelling group in SandPit. The group will produce computer predictions of how waves and currents along the shoreline in any one set of circumstances might be affected by dredging and how these changes will, in turn, affect the shoreline. Model improvements will be made using field data obtained during the project, starting with experiments in the North Sea this autumn.

"Sand is transported in the water column, but the amount transported depends on variables such as the particle size of the sand, on the depth at which the dredging takes place, on currents, and in shallower waters, on wave patterns. Dredging itself, by changing the shape of the sea bed, can affect the wave size and this can have consequent effects, including coastal erosion in some situations," explains Davies.

Current government guidelines regarding the volume and siting of dredging activities varies from country to country and are often based on information extrapolated from small-scale models. The aim of SandPit is to help towards putting future guidelines on a stronger scientific base.

Dr Alan Davies | alfa
Further information:
http://sandpit.wldelft.nl/mainpage/mainpage.htm

More articles from Ecology, The Environment and Conservation:

nachricht Robotic fish to replace animal testing
17.06.2019 | Otto-von-Guericke-Universität Magdeburg

nachricht Marine oil snow
12.06.2019 | University of Delaware

All articles from Ecology, The Environment and Conservation >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: The hidden structure of the periodic system

The well-known representation of chemical elements is just one example of how objects can be arranged and classified

The periodic table of elements that most chemistry books depict is only one special case. This tabular overview of the chemical elements, which goes back to...

Im Focus: MPSD team discovers light-induced ferroelectricity in strontium titanate

Light can be used not only to measure materials’ properties, but also to change them. Especially interesting are those cases in which the function of a material can be modified, such as its ability to conduct electricity or to store information in its magnetic state. A team led by Andrea Cavalleri from the Max Planck Institute for the Structure and Dynamics of Matter in Hamburg used terahertz frequency light pulses to transform a non-ferroelectric material into a ferroelectric one.

Ferroelectricity is a state in which the constituent lattice “looks” in one specific direction, forming a macroscopic electrical polarisation. The ability to...

Im Focus: Determining the Earth’s gravity field more accurately than ever before

Researchers at TU Graz calculate the most accurate gravity field determination of the Earth using 1.16 billion satellite measurements. This yields valuable knowledge for climate research.

The Earth’s gravity fluctuates from place to place. Geodesists use this phenomenon to observe geodynamic and climatological processes. Using...

Im Focus: Tube anemone has the largest animal mitochondrial genome ever sequenced

Discovery by Brazilian and US researchers could change the classification of two species, which appear more akin to jellyfish than was thought.

The tube anemone Isarachnanthus nocturnus is only 15 cm long but has the largest mitochondrial genome of any animal sequenced to date, with 80,923 base pairs....

Im Focus: Tiny light box opens new doors into the nanoworld

Researchers at Chalmers University of Technology, Sweden, have discovered a completely new way of capturing, amplifying and linking light to matter at the nanolevel. Using a tiny box, built from stacked atomically thin material, they have succeeded in creating a type of feedback loop in which light and matter become one. The discovery, which was recently published in Nature Nanotechnology, opens up new possibilities in the world of nanophotonics.

Photonics is concerned with various means of using light. Fibre-optic communication is an example of photonics, as is the technology behind photodetectors and...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

SEMANTiCS 2019 brings together industry leaders and data scientists in Karlsruhe

29.04.2019 | Event News

Revered mathematicians and computer scientists converge with 200 young researchers in Heidelberg!

17.04.2019 | Event News

First dust conference in the Central Asian part of the earth’s dust belt

15.04.2019 | Event News

 
Latest News

Novel communications architecture for future ultra-high speed wireless networks

17.06.2019 | Information Technology

Climate Change in West Africa

17.06.2019 | Earth Sciences

Robotic fish to replace animal testing

17.06.2019 | Ecology, The Environment and Conservation

VideoLinks
Science & Research
Overview of more VideoLinks >>>