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Accueil du site → Master → Pays Bas → 2011 → Drought characterisation in the northern part of Afghanistan - an application of ERA-40 and remote sensing data

UNESCO-IHE Institute for Water Education, Delft (2011)

Drought characterisation in the northern part of Afghanistan - an application of ERA-40 and remote sensing data

Ameer, M.

Titre : Drought characterisation in the northern part of Afghanistan - an application of ERA-40 and remote sensing data

Auteur : Ameer, M.

Université de soutenance : UNESCO-IHE Institute for Water Education, Delft

Grade : Master of Science (MS) 2011

Résumé
Palmer drought severity index has long been used for drought monitoring and identification. Palmer developed his technique in 1965 and since then it is one of the most widely applied technique for drought detection. A number of researchers made contribution to improve on the assumptions and the process representation in the Palmer method. This research was carried out in Amu Darya basin Afghanistan that heavily depends on snowmelt water. Palmer’s technique does not consider snowmelt and takes all the precipitation as rain water. In this study, the standard Palmer method has been modified to incorporate the snowmelt part. Temperature index method was used to melt the snow that contributes to the daily available water. Comparison of Palmer original method and the modified method were carried out with respect to its ability to characterise drought severity. Both techniques were validated with historically reported drought years. Results were also validated with Normalized Differential Vegetation Index (NDVI) which was handy in figuring out the performance of both techniques. Performance of Palmer’s modified method was relatively good compared to the standard Palmer method when compared with remote sensing (NDVI) data. The inclusion of snowmelt part in the method is considered to be worthy due to its good correlation with

Sujets  : snowmelt runoff remote sensing GIS drought Afghanistan

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