期刊
GEOPHYSICAL RESEARCH LETTERS
卷 42, 期 2, 页码 395-402出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2014GL062764
关键词
fluvial geomorphology; river width; river surface area; river channels; remote sensing; hydrologic scaling
资金
- NASA New Investigator Program [NNX12AQ77G]
- NASA Terrestrial Hydrology Program [NNX14AD82G]
- NASA [684728, NNX14AD82G] Funding Source: Federal RePORTER
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 >2.4x10(5)km of rivers wider than 30m 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 100-2000m widths) to narrower rivers and streams. We conservatively estimate the total surface area of North American rivers as 1.24-0.15+0.39x10(5)km(2) (1 sigma confidence intervals), values 20-15+38% greater than previous estimates used to evaluate greenhouse gas efflux from rivers to the atmosphere.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据