Surveying the Venetian Lagoon23/01/2012
|The world's best-known estuarine lagoon has been of tremendous historical importance in sheltering the city of Venice. It is an ever-changing environment with only 8% covered by land, 12% by open water and the remaining 80% by mud flats, tidal shallows and salt marshes. This geographical setting, hosting complex ecosystems, is influenced by tidal cycles entering through three sea inlets and freshwater and sediment supplied by river influx. The Venice Institute of Marine Science (ISMAR-CNR) is engaged in numerous projects regarding researching and monitoring the lagoon.|
Monitoring changes to the environment is becoming ever-more important in view of changing sea levels and as the human impact increases, such as with the MOSE flood protection project enabling the closing of the sea inlets and dredging activities.
Kongsberg Geoacoustics was recently invited by the Institute to demonstrate its technology for gathering high-resolution bathymetry data with the aim of effectively covering large, very shallow water areas with a portable installation, thus providing highly repeatable data to allow monitoring of even the smallest changes over time.
Kongsberg Geoacoustics GeoSwath Plus Compact was chosen due to its capabilities to gather data up to the waterline with a coverage of up to twelve times the water depth in a shallow-water environment. Repeat surveys were carried out and showed to be consistent, despite the difficult hydrological conditions, with large tidal currents and fresh water mixing, leading to high temporal and lateral sound speed variations. In addition, the system offers true co-registered and georeferenced side scan data which can be used for seabed classification and textural mapping.
Image: Bathymetry in front of St Mark's Square, Venice. Image courtesy: Kongsberg GeoAcoustics
comments powered by Disqus
Read more about:
mapping Tidal Dredging data Environment
Supplier: Kongsberg GeoAcoustics Ltd
More news from this supplier:
GeoChirp 3D Sub-bottom Profiler Delivered to China
Surveying a Greek Underwater Archaeological Site
Swedish Coastguard Accepts GeoSwath
Klaipeda Harbour Seabed Mapped
GeoSwath Plus Used for Inland Waterways
Side-scan System for Indian New-build Survey Vessel
One-year Anniversary of Tohoku Earthquake and Tsunami
GeoAcoustics Name Change
Francisco Gutierrez Joins GeoAcoustics as Product Manager
Side-scan Sonar Demonstration
Ocean Energy in Europe Could Supply 115 Million Homes by 2050
Video Introducing EMODnet
Monitoring Network for Scottish Ports
GIS Software for Underwater Survey
Europe’s Deepest Glider to be Developed
25 Years Scientific Service for RV Heincke - and Counting
R/V Aranda Turns into Next Generation Marine Research
World ECDIS Day
HELCOM Contributes to Report on Oceans and the Law of the Sea
Oceans of Colour
How to Use QPS' Qimera to Validate Processed Point Files
QPS Qimera processing software has been released earlier this year. To demonstrate the capabilities, this video shows how to load processed point files into a Qimera Project. It explains what processed point files are; how to specify the coordinate system of the project and the source files; how to create a Dynamic Surface from processed point files and how to change the dynamic surface and adjust the colour map to aid data editing and validation.