Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Use of Satellite and In Situ Reflectance Data for Lake Water Color Characterization in the Everest Himalayan Region |
| Abstract | This study applied remote sensing techniques to the study of water color in Himalayan glacial lakes as a proxy of suspended solid load. In situ measurements gathered in 5 lakes in October 2014 during satellite data acquisition enabled the characterization of water reflectance and clarity and supported image processing. Field data analysis led to a distinction between 3 water colors and a consequent lake water color classification on a regional scale from Landsat-8 data previously corrected for atmospheric and adjacency effects. Several morphometric parameters (lake size and shape, distance between lake and glacier) were also computed for the lakes thus classified. The results showed spatial and temporal variations in lake water color, suggestive of relationships between glacier shrinkage and the presence of brighter and more turbid water. A finer-scale analysis of the spatial variability of water reflectance on Chola Lake (based on GeoEye-1 data captured on 18 October 2014) showed the contribution of water component absorption from the inflow. Overall, the findings support further research to monitor Himalayan lakes using both Landsat-8 and Sentinel-2 (with its improved resolutions). |
| Source | Mountain research and development 37 (1), pp. 16–23 |
| Keywords | Hyperspectral water reflectancelake colorlake size and shapehigh spatial resolutionLandsatSecchi diskglacial lakesglacial lake outburst flood (GLOF)Nepal |
| Journal | Mountain research and development |
| Editor | International Mountain Society,, [Bern, Switzerland], |
| Year | 2017 |
| Type | Articolo in rivista |
| DOI | 10.1659/MRD-JOURNAL-D-15-00052.1 |
| Authors | Matta, Erica; Giardino, Claudia; Boggero, Angela; Bresciani, Mariano |
| Text | 369735 2017 10.1659/MRD JOURNAL D 15 00052.1 ISI Web of Science WOS 000395382000003 Hyperspectral water reflectance lake color lake size and shape high spatial resolution Landsat Secchi disk glacial lakes glacial lake outburst flood GLOF Nepal Use of Satellite and In Situ Reflectance Data for Lake Water Color Characterization in the Everest Himalayan Region Matta, Erica; Giardino, Claudia; Boggero, Angela; Bresciani, Mariano CNR IREA; CNR ISE This study applied remote sensing techniques to the study of water color in Himalayan glacial lakes as a proxy of suspended solid load. In situ measurements gathered in 5 lakes in October 2014 during satellite data acquisition enabled the characterization of water reflectance and clarity and supported image processing. Field data analysis led to a distinction between 3 water colors and a consequent lake water color classification on a regional scale from Landsat 8 data previously corrected for atmospheric and adjacency effects. Several morphometric parameters lake size and shape, distance between lake and glacier were also computed for the lakes thus classified. The results showed spatial and temporal variations in lake water color, suggestive of relationships between glacier shrinkage and the presence of brighter and more turbid water. A finer scale analysis of the spatial variability of water reflectance on Chola Lake based on GeoEye 1 data captured on 18 October 2014 showed the contribution of water component absorption from the inflow. Overall, the findings support further research to monitor Himalayan lakes using both Landsat 8 and Sentinel 2 with its improved resolutions . 37 Published version Articolo in rivista International Mountain Society, 0276 4741 Mountain research and development Mountain research and development Mt. res. dev. Mountain research and development. erica.matta MATTA ERICA claudia.giardino GIARDINO CLAUDIA angela.boggero BOGGERO ANGELA mariano.bresciani BRESCIANI MARIANO TA.P06.018.001 Telerilevamento ottico per il monitoraggio del territorio e dell ambiente |