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@article{geoplanning67047, author = {Assoule Dechaicha and Walid Arab and Djamel Alkama}, title = {The Ecological Impact of Urban Expansion in Oasis Environments: A combined Cartographic and Landscape Analysis of Laghouat Oasis in the Algerian Sahara}, journal = {Geoplanning: Journal of Geomatics and Planning}, volume = {12}, number = {1}, year = {2025}, keywords = {Spatial growth; Palm grove; Oasis ecosystem; Satellite image; Landscape metrics; Landscape fragmentation}, abstract = {Current urban expansion patterns are mostly considered impulsive, with numerous negative consequences for our biosphere. This disturbing fact has not gone unnoticed in the sprawling oasis cities of the Algerian Sahara. The palm groves are the main victim. Moreover, any approach taken to preserve oasis ecosystems requires considering ecological variables. In this perspective, the present study seeks to highlight the spatial growth process of the Laghouat oasis in southern Algeria, during the period 1986 - 2019. The methodology is based on the supervised classification of four Landsat satellite images to initiate a cartographic analysis and a landscape quantification of the land use evolution. The results of the cartographic analysis highlighted two completely opposite spatiotemporal trends: significant growth of built-up areas, against a considerable retreat of palm groves. The monitoring of the landscape metrics also revealed two different behaviours: growth by densification and elongation of the urban fabric, versus progressive morcellation and fragmentation of the palm groves. These results pointed to the negative impact of uncontrolled extensions on the oasis landscape. The present research also demonstrated the significance of landscape metrics in assessing various forms of spatial urban growth, and could support urban planners in choosing the best solutions for oasis sustainability.}, issn = {2355-6544}, doi = {10.14710/geoplanning.12.1.%p}, url = {https://ejournal.undip.ac.id/index.php/geoplanning/article/view/67047} }
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Last update: 2025-05-23 16:02:25