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Universiteit Gent (2003)

MULTI-SCALE DATASET REMOTE SENSING BASED ASSESSMENT OF LANDSCAPE CHANGE AND DESERTIFICATION MONITORING IN NORTH ETHIOPIA (TIGRAY)

Gebrehawariat Girma

Titre : MULTI-SCALE DATASET REMOTE SENSING BASED ASSESSMENT OF LANDSCAPE CHANGE AND DESERTIFICATION MONITORING IN NORTH ETHIOPIA (TIGRAY)

Auteur : Gebrehawariat Girma

Université de soutenance : Universiteit Gent

Grade : Master of Science (MS) Physical Land Resources 2003

Résumé
Population pressure is one of the factors that contribute to intensify the process of degradation. Continued farming of the degraded marginal lands and use of fire wood as source of energy are some of the problems assumed to deepen the situation. Climatic elements such as rainfall and temperature worsen the impact. Farmers already noticed the situation, and were forced to change the cropping pattern, earlier crops like barley that was growing in “Betmera” area and its surroundings are now replaced by drought tolerant crops like maize and sorghum.. Three different methods were used to assess the vegetation states in the study area to monitor the landscape change between two imaging dates, 1986 and 2003. The conclusion of this remote sensing data base study is that large areas of landscape have changed. Yet it is necessary to support this study with ground check and verification to concretize the result. At the level of this study, the result reflects the magnitude of the vegetation degradation over weighed regeneration at the higher altitude steep and very steep lands of Betmera area, and numerous similar natural phenomena and human activity that are indeed taking place in the region. Hence, the process of land degradation : soil erosion and loss of vegetation are playing a role in land resource deterioration. The occurrence of frequent drought in the region shocks the biophysical environment and the ecosystem. Therefore, the overall situation is leading to the condition of desertification.

Source : Pedon 15 - Physical Land Resources - Universiteit Gent

Page publiée le 25 décembre 2015, mise à jour le 23 janvier 2018