COASTAL EVOLUTION MONITORING USING REMOTE SENSING

In order to provide a coastal erosion monitoring by remote sensing, a multi-date dataset is required. In this study, images from optical sensors such as Landsat TM and MSS, SPOT PLA and MLA are used with radar images from ERS-1 and airborne SAR to monitor the coastline evolution from 1977 to 1992. The study area is the Magdelen Islands in the Gulf of St-Lawrence, Canada. This archipello has a sedimentary budget in equilibrium, meaning that sediment erosion and accretion are balanced. Nevertheless, some beaches have an accretion of up to 15 m per year while others are being eroded. Such massive sediment drifts cause the formation of coastal sand bars modifying the beach profiles. An eroded beach tends to have a steep profile while an accredited beach will be smoother with sand bars. This feature may be detectable by waves breaking on top of the bars. Modification of the sea surface roughness induced by breaking waves may be monitored on either optical or radar sensors. Monitoring the coastline changes may give an indication on how this interface, between land and sea, may be disrupted by sea level rise caused by global change, if any.

  • Supplemental Notes:
    • WMO/IOC Technical Conference on Space-Based Ocean Observations; September 1993; Bergen, Norway. Sponsored by World Meteorological Organization and Intergovernmental Oceanographic Commission (of UNESCO). Procs. Interactive Session 1, p 119 [6 p, 10 ref, 1 tab, 7 fig]
  • Authors:
    • De Lisle, D A
    • Drapeau, G
  • Publication Date: 1993

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00717213
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Mar 4 1996 12:00AM