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| Titel: |
A New Video and Digital Camera System for Studies of the Dynamics of Microtopographic Features on Tidal Flats |
| Auteur: |
Lund-Hansen, Lars Chresten Larsen, Einer Jensen, Kurt Thomas Mouritsen, Kim N. Christiansen, Christian Andersen, Thorbjørn Joest Vølund, Gunnild |
| Verschenen in: |
Marine georesources & geotechnology |
| Paginering: | Jaargang 22 (2004) nr. 1-2 pagina's 115-122 |
| Jaar: |
2004-01 |
| Inhoud: |
A newly developed video and camera system for tidal flat microtopographic studies is presented. It consists of a SONY handy cam placed in an underwater housing mounted on a frame about 70 cm above the sediment surface. A rectangular surface area of 30 ×40 cm is imaged by the camera. The camera records video sequences and/or digital images at predetermined time lapses. The total number of images is about 540, and a similar number of 10-second long video sequences can be recorded. The camera is programmed with a PC before deployment, and the total deployment time depends on the time lapse between recordings. The camera is connected to an external power supply (12 volt), and a halogen projector pointing towards the sediment surface ensures that the system is operable on a 24-hours scale. The system has been tested in the Danish Wadden Sea. It has proved to be a very useful tool in studies of topographic effects of erosion and deposition sequences, and for studies of benthic organisms-sediment interactions. The test site was further equipped with sensors for water and seabed measurements, which proved to be indispensable regarding the interpretation of recorded image time-series. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 1 van 32 gevonden artikelen
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