This article by Terri Cook, was published April 6th, 2017 on Earth and Space Science News (EOS).
A “big data” analysis of nearly 1 million river junctions in the contiguous United States shows that branching angles in dendritic drainages vary systematically between humid and arid regions.
Although dendritic river networks, whose branches join in treelike fashion to form increasingly larger streams, are found all over the world, the processes that shape them are still poorly understood. To explore whether climate influences the geometry of dendritic stream networks, Seybold et al. analyzed nearly 1 million digitally mapped river junctions in different climatic regimes across the contiguous United States.
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