A study of riverbed dynamics using remote sensing: A 3D case study of Rivière des Galets, La Réunion Island
Résumé
La Réunion 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 Rivière 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.
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A STUDY OF RIVERBED DYNAMICS USING REMOTE SENSING_ A 3D CASE STUDY OF RIVIÈRE DES GALETS, LA RÉUNION ISLAND.pdf (1.5 Mo)
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