"DEVELOPMENT OF A DYNAMIC MONITORING TOOL FOR GRASS BIOMASSES AND AN EARLY WARNING TOOL FOR LIVESTOCK IN THE INDIAN OCEAN REGION BY THE COMBINED USE OF REMOTE SENSING,
MODELLING AND GIS"

Cyprien ALEXANDRE

 cyprien

2013 - 2017

Supervisor: Gilles LAJOIE, Emmanuel TILLARD and Paulo SALGADO

Funded by: Reunion Regional Council, European Union (ESF). 

The aim of this thesis is to propose a grassland growth model to estimate the available biomass both on the plot and on all the plots on Reunion Island simultaneously. For this we use two growth models designed by CIRAD. One adapted from a sugarcane growth model to estimate the biomass of tropical species; the other resulting from a grassland growth modulus of the GAMEDE model adapted more to temperate species. These models have been calibrated thanks to the various forage trials carried out by CIRAD. In order to correct these models the objective of forcing the values of some of their parameters by estimated values from multi-spectral satellite images. Once the images have been processed, the forcing will be done thanks to the OCELET programming environment, allowing to apply the model simultaneously on all the plots on Reunion Island. The cartographic rendering of the temporal series will make it possible to visualize both the historical and future evolution of biomass.

 

Doctoral thesis

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