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Lunds Universitet (1988)

The impact of climate and man on land transformation in central Sudan : applications of remote sensing

Ahlcrona, Eva

Titre : The impact of climate and man on land transformation in central Sudan : applications of remote sensing

Auteur : Ahlcrona, Eva

Université de soutenance : Lunds Universitet (Sweden)

Grade : Fil.Dr. 1988

Résumé
A project was started in 1981 to study the impact of climate and man on land transformation in semi-arid regions in Central Sudan. Landsat-based digital remote sensing, interviews, rainfall and environmental field data were analysed and crop statistics were used for collecting the data. The study showed that the major impact on the biological productivity of the land was not caused by man but by climatic factors. The only observed indication of man-made land degradation was a qualitative deterioration of the vegetation. It was indicated that the dry period which started in 1966 might constitute a medium-termed climatic change towards drier conditions. Moreover, there was a strong relation between landsat data and field cover/grass biomass. This implied a high potential use of landsat data for grass resource monitoring. The strong relationship was not specifically regarded as a function of the vegetation reflectance, but was also highly related to the vegetation shadow effect on light-coloured soils.

Mots clés : Remote sensing, Desertification, Sudan, Climate, Geography, Earth sciences

Présentation (CAB direct)

Page publiée le 25 février 2015, mise à jour le 28 février 2019