Fiche détaillée
| Id | 201 |
| Auteur | Makri, Stamatina |
| Titre | Sentinel-2 and Landsat-7 satellite images qualitative comparison for evaluating advances in detecting lakes’ quality parameters |
| Sous-titre | Sous-titre du rapport |
| Résumé | Résumé en français |
| Summary | Lakes are extremely important providing a wide range of ecosystem services, biodiversity, climate change, drinking water supply, recreation and tourism. At the same time lakes are under increasing pressure and extremely vulnerable to various perturbation decreasing their quality. Water monitoring is indispensable for mitigating this problem; however there is a constant need for cost-effective ways of monitoring, which spatial and temporal exigencies increase as well. Remote sensing has proven to be an effective tool for evaluation of in-water constituents of lakes. As some of these parameters can be determined and examined by remote sensing, it is indispensable to keep pace with new advances. This study examined the characteristics of the newcomer satellite sensor Sentinel-2A and compared its performance with its heritage, mainly Landsat 7 and 8 missions. We provided a general qualitative evaluation of two satellite scenes, one for the Sentinel-2A sensor and another for the Landsat 7 ETM+. Images’ multispectral transformations revealed a significantly higher quality of the Sentinel-2A scene. In particular, high spatial resolution coupled with the improved and higher spectral resolution, resulted in high detailed color composites and band ratios. The calculation of certain indexes for evaluating Chl-a distribution in the lake, revealed the added value coming from the improved band placement of the Sentine-2 sensor and in particular the advantage of the smaller bandwidth in red-edge part of the spectrum. |
| Volee | 2015 |
| Soutenance | 2016-06-20 |
| Sujet | |
| Url 1 | Rapport de stage |
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