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Patterns of river width and surface area revealed by the satellite‐derived North American River Width data set
Author(s) -
Allen George H.,
Pavelsky Tamlin M.
Publication year - 2015
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1002/2014gl062764
Subject(s) - biogeochemical cycle , streams , environmental science , hydrology (agriculture) , digital elevation model , discharge , data set , scale (ratio) , elevation (ballistics) , satellite , geology , physical geography , drainage basin , remote sensing , geography , cartography , statistics , geometry , mathematics , computer network , chemistry , geotechnical engineering , aerospace engineering , computer science , environmental chemistry , engineering
As hydraulic, hydrologic, and biogeochemical models evolve toward greater spatial resolution and larger extent, robust morphometric data sets are essential to constrain their results. Here we present the Landsat‐derived North American River Width (NARWidth) data set, the first fine‐resolution, continental scale river centerline and width database. NARWidth contains measurements of >2.4 × 10 5 km of rivers wider than 30 m at mean annual discharge. We find that conventional digital elevation model‐derived width data sets underestimate the abundance of wide rivers. To calculate the total surface area of North American rivers, we extrapolate the strong observed relationship between river width and total surface area at different river widths ( r 2 > 0.99 for 100–2000 m widths) to narrower rivers and streams. We conservatively estimate the total surface area of North American rivers as 1.24 − 0.15 + 0.39 × 10 5 km 2 (1σ confidence intervals), values 20 − 15 + 38 % greater than previous estimates used to evaluate greenhouse gas efflux from rivers to the atmosphere.