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Remote sensing of water quality for Burullus lake, Egypt / Kh. M. Dewidar in Geocarto international, vol 20 n° 3 (September - November 2005)  

Public [article]  inGeocarto international > vol 20 n° 3 (September - November 2005) . - pp 43 - 49 Titre : Remote sensing of water quality for Burullus lake, Egypt Type de document : Article/Communication Auteurs : Kh. M. Dewidar, Auteur ; A.A. Khedr, Auteur Année de publication : 2005 Article en page(s) : pp 43 - 49 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] analyse comparative [Termes IGN] appariement d'images [Termes IGN] carte thématique [Termes IGN] composition chimique [Termes IGN] données de terrain [Termes IGN] Egypte [Termes IGN] image Landsat-TM [Termes IGN] image multibande [Termes IGN] lac [Termes IGN] qualité des eaux [Termes IGN] radiance [Termes IGN] régression multiple Résumé : (Auteur) The objective of this study was to use Landsat Thematic Mapper TM data combined with surface measurements for mapping water quality parameters of Burullus Lake. Water samples were collected in the field at the same time of satellite image acquisition (April, 1997). TM bands 1, 2, 3, 4, 5, 7 and band ratios 1/4, 3/2, 2/1, 4/2, 4/3, 3/4, 7/5 and principal components of TM bands 1-4 (PC1 and PC2) were compared with in situ measurements and laboratory analysis of water samples. The water quality of interest included, Cl-, K+, Na+, soluble reactive phosphorus (SRP) dissolved inorganic nitrogen (DIN), dissolved oxygen (DO), pH, Salinity, Secchi disc and water depth. Also, the percentage of organic matter in bottom sediments and texture (sand, silt, clay) analyses are used in the evaluation processes. Correlation and regression models were developed between each of the water quality parameter measurements and the radiance of image data. Some water quality parameters were significantly correlated with TM radiance data. Subsequently, multiple linear regression models were used to prepare digital cartographic products depicting the water quality over the entire study area. Numéro de notice : A2005-446 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106040508542354 Date de publication en ligne : 02/01/2008 En ligne : https://doi.org/10.1080/10106040508542354 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27582 [article]

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