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

Volume

3

fYear

2009

fDate

12-17 July 2009

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/IGARSS.2009.5417874

Filename

5417874