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- W632240198 abstract "1 Abstract: This study investigates the ability of satellite remote sensing and GIS tools to map temporal and spatial patterns of sands dunes, vegetation greenness variability and their interrelationships around water points in the rangelands of Dahar and El Ouara (Tataouine -Tunisia) during the period 1975-2000. Use was made of both supervised and non-supervised classification, vegetation indices, image differentiation, change detection, and pattern metrics of Landsat MSS, TM and ETM+ time series images. While the physical framework (rainfall and wind erosion) emerges as the dominant causative factor for the degradation, there are evidences of human-induced changes (dry-farming and livestock) coupled to climate trends. Although the comparative study has not resulted in a consensus on either the direction of changes or its underlying causes, the results indicate that the proposed method is applicable to identify the dynamic nature of the local ecosystems and its susceptibility to changes and, therefore, has good potential for monitoring desertification processes." @default.
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- W632240198 date "2009-06-25" @default.
- W632240198 modified "2023-09-27" @default.
- W632240198 title "Mapping Long-Term Variability of Vegetation Greenness and Sand Dunes around Watering Points in the Rangelands of Dahar and El Ouara (Tunisia) during the Period 1975-2000 through Remote Sensing Data" @default.
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