"Rivers Forming" graphic from National Geographic.

I came across this aerial photo by National Geographic and was compelled to post on the hydrology of how such a stunning river would develop. Dendritic drainage structures originate from sheet flow – downslope movement of water as a thin sheet – which converges or diverges on an uneven surface. Where convergence occurs the water develops more power (mass x velocity), which mobilizes sediments. This erosion...

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