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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]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
059-05031	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Detection of land use/land cover changes for the northern part of the Nile delta (Burullus region), Egypt / Kh. M. Dewidar in International Journal of Remote Sensing IJRS, vol 25 n° 20 (October 2004)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 25 n° 20 (October 2004) . - pp 4079 - 4089 Titre : Detection of land use/land cover changes for the northern part of the Nile delta (Burullus region), Egypt Type de document : Article/Communication Auteurs : Kh. M. Dewidar, Auteur Année de publication : 2004 Article en page(s) : pp 4079 - 4089 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] analyse diachronique [Termes IGN] classification dirigée [Termes IGN] classification hybride [Termes IGN] classification non dirigée [Termes IGN] delta [Termes IGN] détection de changement [Termes IGN] Egypte [Termes IGN] environnement [Termes IGN] image Landsat-TM [Termes IGN] impact sur l'environnement [Termes IGN] Nil (delta du) [Termes IGN] Nil (fleuve) [Termes IGN] route [Termes IGN] utilisation du sol Résumé : (Auteur) The monitoring of land use/land cover changes along the north part of the Nile delta, Egypt is very important for the planner, management, governmental and non-governmental organizations and the scientific community. This information is essential for planning and implementing policies to optimize the use of natural resources and accommodate development whilst minimizing the impact on the environment. To study these changes along the study area, two sets of Landsat Thematic Mapper (TM) data were used. TM data are useful for this type of study due to its high spatial resolution, spectral resolution and low repetitive acquisition (16 days). A post-classification technique is used in this study based on hybrid classification (unsupervised and supervised). Each method used was assessed, and checked in field. Nine land use/land cover classes are produced. The overall accuracy for a 1984 image is 78% and for a 1997 image is 80%. The objective of this study was to detect land use/land cover changes, and to assess the nature of future change following construction of the international coastal road which crosses the study area. Numéro de notice : A2004-420 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431160410001688312 En ligne : https://doi.org/10.1080/01431160410001688312 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26947 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
080-04181	RAB	Revue	Centre de documentation	En réserve L003	Exclu du prêt