Title :
A study of riverbed dynamics using remote sensing: A 3D case study of Rivière des Galets, La Réunion Island
Author :
Kemp, J. ; Villeneuve, N. ; Chevallier, L. ; Servadio, Z. ; Jacquard, F.
Author_Institution :
Lab. Geosci. Reunion, Univ. of La Reunion, La Reunion, France
Abstract :
La Reunion Island suffers severe erosion due to high tropical rainfall and steep volcanic slopes. Using aerial and SPOT imagery we monitor horizontal and vertical changes in the morphology of Riviere des Galets on the west coast of the island. SPOT imagery from 2000 to 2008 is used to monitor the evolution of the delta and construct a multi-seasonal flow pattern of the river thalweg. Stereographic aerial photography from 2006 and 2008 is used to construct high resolution DEMs which allows the calculation of displaced sediment volume in the river. Cross-sectional profiles for three successive years, collected by differential GPS, provide accurate validation of the results.
Keywords :
Global Positioning System; digital elevation models; erosion; geomorphology; geophysical techniques; photogrammetry; remote sensing; rivers; sedimentation; La Reunion Island; Riviere des Galets; SPOT imagery; aerial imagery; delta evolution; differential GPS; displaced sediment volume; erosion; geomorphology; high resolution DEM; multiseasonal flow pattern; remote sensing; river thalweg; riverbed dynamics; steep volcanic slopes; stereographic aerial photography; tropical rainfall; Computer aided software engineering; Councils; Geoscience and remote sensing; Global Positioning System; Monitoring; Photography; Remote sensing; Rivers; Sediments; Tropical cyclones; Delta; Erosion; Geomorphology; Remote Sensing; Stereophotogrammetry;
Conference_Titel :
Geoscience and Remote Sensing Symposium,2009 IEEE International,IGARSS 2009
Conference_Location :
Cape Town
Print_ISBN :
978-1-4244-3394-0
Electronic_ISBN :
978-1-4244-3395-7
DOI :
10.1109/IGARSS.2009.5417874
