Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Master → Royaume Uni → Application of vegetation status indices for near real-time drought monitoring in Mozambique using NOAA-AVHRR-NDVI (2005)

Cranfield University at Silsoe (2005

Application of vegetation status indices for near real-time drought monitoring in Mozambique using NOAA-AVHRR-NDVI (2005)

Covele, Paulo Alberto

Titre : Application of vegetation status indices for near real-time drought monitoring in Mozambique using NOAA-AVHRR-NDVI (2005)

Auteur : Covele, Paulo Alberto

Grade : Master of Science Geographical Information Management 2005

Université de soutenance : Cranfield University at Silsoe

Résumé
Mozambique, as the rest of Southern Africa contries, is being affected by frequent drought which has negative impacts on the rainfed agriculture of the local people. The use of global coverage and high temporal resolution satellite data, to monitor this process is becoming a better alternative to the scarce, incomplete, disperse and unavailable meteorological data in the region. This project aims to assess the differences and suitability of the vegetation condition index (VCI), standardized vegetation index (SVI) and vegetation productivity indicator (VPI), based on ten days NDVI images, from 1982 to 2005, from the AVHRR sensor onboard in the NOAA satellite service (ADDS) web site, imported into EDRAS, masked and corrected for cloud contamination. Using different models created in ERDAS 8.7 and ArcGIS the vegetation Index images were produced. All the indices showed that the 1992 drought was the most severe in the history of the sensor record ; The Southern part of Mozambique (Inhambane Maputo and Sofala Provinces)South and East part of Tete and North and South parts of Manica and Sofala provinces in Central Mozambique are the areas with highest prevalence of drought. However VCI seemed to underestimate the severe conditions and overestimate the good condition while SVI and VPI were more accurate, with VPI better. Further works should include the validation of the indices with the local rainfall data and testing of the indices in the local system of drought monitoring

Présentation

Version intégrale

Page publiée le 27 mai 2011, mise à jour le 18 octobre 2018