Abstracts
Abstract
Changes in land use, which threaten ecosystems and habitats, have an impact on run-off and water quality on urban areas. Using a GIS program we have classified the land use of the Humphreys Brook watershed and quantified the changes that have occurred using landscape metrics. A rapid growth of the city emerges from our results. All land use types of urban nature have seen an increase in surface areas to the detriment of natural land uses. Moreover the landscape indices are showing signs of rectangularity, where humans have introduced straight edges, and other common processes of transformation to the landscape.
Keywords:
- land use,
- aerial photographs,
- GIS,
- urban landscape,
- watershed
Résumé
L’urbanisation a divers impacts sur l’environnement. Une classification de l’utilisation du sol a été réalisée à l’aide d’un SIG pour le bassin versant du ruisseau Humphrey. Nos résultats indiquent une croissance rapide de la ville, qui figure d’ailleurs parmi les plus villes ayant le taux de croissance le plus rapide au Canada. Tous les types d’utilisation du sol qui caractérisent le paysage urbain ont connu une hausse au détriment des types plutôt naturels. Finalement des indices du paysage ont permis de détecter des signes de rectangularité résultant d’activités humaines.
Mots-clés :
- utilisation du sol,
- photographies aériennes,
- SIG,
- paysage urbain,
- bassin versant
Appendices
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