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Jeudi 11 Octobre - Organizing the World's Water: Rivers at Many Scales

Par SEMSOU Dernière modification 16/09/2018 11:19
Quand ? Le 11/10/2018,
de 11:00 à 12:00
Où ? salle Coriolis
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Tamlin PAVELSKY

Global Hydrology Laboratory, University of North Carolina, Chapel Hill, USA



Organizing the World's Water: Rivers at Many Scales


Abstract: Rivers and streams organize the world’s surface water into defined networks that provide resources, generate hazards, and influence civilizations.  On many maps, rivers are merely lines, despite the fact that the properties of rivers vary tremendously depending on the climatic and physiographic characters of their contributing basins.  With the advent of widely available, multitemporal satellite imagery over the entire globe, we can now examine how the properties of rivers vary on global scales. At the smallest scales, though, we must still rely on traditional field-based approaches. In this talk, we will explore how the new Global River Widths from Landsat (GRWL) database can be combined with field measurements of the smallest streams to estimate the global surface area of rivers and streams. 

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