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Accueil du site → Master → Ethiopie → Temporal Change Detection of Vegetation Coverage and Characterized Impacts of Drought on Existing Vegetation of Arbaminch Nechsar National Park of Ethiopia Using Remote-Sensing

Addis Ababa University (2020)

Temporal Change Detection of Vegetation Coverage and Characterized Impacts of Drought on Existing Vegetation of Arbaminch Nechsar National Park of Ethiopia Using Remote-Sensing

Tibebu, Manaye

Titre : Temporal Change Detection of Vegetation Coverage and Characterized Impacts of Drought on Existing Vegetation of Arbaminch Nechsar National Park of Ethiopia Using Remote-Sensing

Auteur : Tibebu, Manaye

Université de soutenance : Addis Ababa University

Grade : Masters of Science in in Geomatics and geodesy engineering 2020

Résumé
The assessment of LULCC and vegetation drought is vital in the environment and climate change studies as vegetation cover change in the protected area indicate the status of available resources. Vegetation cover change and drought patterns are the main problems in Arbaminch Nechsar national park. However, there are minimum attempts made to investigate this problem with a different geospatial method and data sets. Hence LULCC and drought analysis is crucial to recognize major pressures and to make a clarification for prospect management of the park environment and territories. This study aims to evaluate LULC transition and drought over the past 40 years using the vegetation condition index (VCI) and Normalized Difference Vegetation Index (NDVI).In this study Landsat, MODIS data, metrological data of the area, GPS field data were used to detect the changes in vegetation and drought. Using Bothe supervised classification algorithm and Markov modeling ware, for determination of LULCC and projected land use the land cover of the park respectively. During the study period from 1989-2019, there were significant land-use transitions, degraded grassland, and cultivated land area shows increments of size about 7.61% and 7.41% respectively. Contrary, in the study period open grassland and riparian forest, reduces the size the amount by 14.78% and 7.36 % correspondingly.in the period 2009-2019 the result observed 1.2% of riparian forest transit into cultivated land and 1.2% of open grassland translated into degraded grassland. The reason for this reduction is linked to excessive harvesting for charcoal and also fire for obtaining grazing fields. The outcome confirms open grassland is covered by another encroachment plants. For the study, the region of the park was affected by drought. The period 2000 Arbaminch NSNP has not been affected by drought .over the year 2009 and 2019 central part of the park and the area which placed in the shoreline of Lake Chamo and Lake Abaya has affected by drought. The problem of LULCC and drought existence is directly or indirectly associated with the activity of humans. Hence, Understanding of the vegetation and drought changes and taking corrective measures are recommended for proper management of the park.

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