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TitleCartographie de l'occupation et de l'utilisation du sol par imagerie satellitaire Landsat en hydrogéologie / Land cover and land use mapping using Landsat imagery in hydrogeology
AuthorChalifoux, S; Nastev, MORCID logo; Lamontagne, C; Latifovic, R; Fernandes, RORCID logo
Source12e Congrès de l'Association québécoise de télédétection: comptes rendus; Télédétection vol. 6, no. 1, 2006 p. 9-17
Alt SeriesEarth Sciences Sector, Contribution Series 2005118
Meeting12e Congrès de l'Association québécoise de télédétection; Saguenay, QC; CA; May 10-12, 2005
Mediaon-line; digital
File formatpdf (Adobe® Reader®)
ProgramCanadian Space Agency, Government Related Initiative Program (GRIP)
ProgramCanadian Space Agency, Earth Observation Application Development Program (EOADP)
AbstractIn the scope of its research activities related to groundwater, Natural Resources Canada in collaboration with the provinces and other
stakeholders plan to assess major Canadian aquifers and study aquifer dynamics. The use of Earth Observation data for land cover and
land use mapping is a practical approach because of their large extensive coverage and relatively low purchase and processing costs, comparatively to traditional methods using aerial photographs. The study presents the potential of Landsat images for land cover and
land use mapping in hydrogeology.
The primary objective of this project is the evaluation of the accuracy of two land use and land cover maps generated using Landsat
imagery. In addition, it aims at defining a classification scheme adapted to aquifer recharge modeling. The study area is the Canadian
part of the Châteauguay River watershed straddling southwestern Québec (Canada) and northeastern New York State (United States).
The results of the precision analysis for both maps are very similar with an accuracy varying from 68 % to 72 % and Kappa indexes
from moderate to substantial. Excellent accuracy rates were obtained for agricultural and wetland classes. The main confusions are
associated with neglected classes in the mapping process that cover small areas within the study area. A hydrogeological land cover
and land use classification scheme, relevant to recharge analysis using the HELP hydrological model, was developed.
Landsat optical images allow homogeneous mapping of the current land cover and land use, with the advantage of evolving in a digital
environment thus facilitating spatial modeling.

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