Centre de documentation
scientifique

Dépouillements

Understanding dynamics of large rivers aided by satellite remote sensing: a case study from Lower Ganga plains, India / R. Sinha in Geocarto international, vol 27 n° 3 (June 2012)  

Public [article]  inGeocarto international > vol 27 n° 3 (June 2012) . - pp 207 - 219 Titre : Understanding dynamics of large rivers aided by satellite remote sensing: a case study from Lower Ganga plains, India Type de document : Article/Communication Auteurs : R. Sinha, Auteur ; S. Ghosh, Auteur Année de publication : 2012 Article en page(s) : pp 207 - 219 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] alluvion [Termes IGN] analyse diachronique [Termes IGN] barrage [Termes IGN] Gange (fleuve) [Termes IGN] géomorphologie locale [Termes IGN] hydrodynamique [Termes IGN] Inde [Termes IGN] sédimentation Résumé : (Auteur) The advent of satellite remote sensing has provided a huge opportunity to geomorphologists to study the temporal dynamics of large rivers. The repetitive coverage of satellite data is an important archive to reconstruct historical-scale dynamics of large rivers and to understand the causal factors. In the lower reaches of the Ganga River around Farakka, natural as well as anthropogenic factors have influenced large-scale dynamics of the river during the last 234 years. The construction of the Farakka barrage was started in 1961 and was completed in 1971 except the feeder canal. The barrage was finally commissioned in 1975 but the serious problems of aggradation both upstream and downstream of the barrage had started much earlier resulting in significant changes in channel morphology and position. The channel upstream of the Farakka barrage has moved towards the east but channel shifting downstream of the Farakka barrage has been erratic. We argue that sedimentological readjustments due to aggradation and bar growth are the major factors influencing the river dynamics in this region. Numéro de notice : A2012-247 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106049.2011.620180 Date de publication en ligne : 26/10/2011 En ligne : https://doi.org/10.1080/10106049.2011.620180 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31693 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
059-2012031	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Use of high-resolution satellite imagery for investigating acid mine drainage from artisanal coal mining in North-Eastern India / B. Blahwar in Geocarto international, vol 27 n° 3 (June 2012)  

Public [article]  inGeocarto international > vol 27 n° 3 (June 2012) . - pp 231 - 247 Titre : Use of high-resolution satellite imagery for investigating acid mine drainage from artisanal coal mining in North-Eastern India Type de document : Article/Communication Auteurs : B. Blahwar, Auteur ; S. Srivastav, Auteur ; J. Smeth, Auteur Année de publication : 2012 Article en page(s) : pp 231 - 247 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] fer [Termes IGN] image à très haute résolution [Termes IGN] image Cartosat-1 [Termes IGN] image IRS-LISS [Termes IGN] image IRS-P6 [Termes IGN] image panchromatique [Termes IGN] image Quickbird [Termes IGN] Inde [Termes IGN] mine de charbon [Termes IGN] pollution des eaux [Termes IGN] ruissellement [Termes IGN] sol acide Résumé : (Auteur) Acid mine drainage (AMD) is one of the major environmental problems in coalmining districts. The present study explores the potential of high-resolution satellite (HRS) imagery, combined with field-based geochemical sampling, for investigating the AMD-related issues arising from artisanal coal mining activity in a part of North-Eastern India. The HRS imagery available from Indian remote sensing satellites (CARTOSAT-1 and RESOURCESAT-1) and QuickBird are used for this purpose. The study demonstrates that (1) the artisanal ‘rat-hole' type coal mines prevalent in the study area can be mapped to a fair extent through merged CARTOSAT-1 PAN and RESOURCESAT-1 LISS-IV imagery; (2) coal mining-induced enhanced dissolution of pyrites appears to be the main mechanism for the occurrence of AMD exacerbating the problem of acid rock drainage (ARD); and (3) HRS imagery can be used to detect iron precipitates on streambeds indicating the presence of AMD. Numéro de notice : A2012-248 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106049.2011.628761 Date de publication en ligne : 05/12/2011 En ligne : https://doi.org/10.1080/10106049.2011.628761 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31694 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
059-2012031	RAB	Revue	Centre de documentation	En réserve L003	Disponible