the.com/watercourse

Earth's oldest engineer, sketching valleys with nothing but patience and gravity.

means A natural or artificial channel through which water flows — a stream, river, brook, or canal — or the course such water takes.

from A transparent compound of "water" and "course," both old English-rooted words. "Course" comes through Old French "cours" from Latin "cursus," meaning "a running" (from "currere," to run — the same root that gallops through "current," "courier," and "cursive"). So a watercourse is, quite literally, "the running of water" — the path water takes when it runs its course.

defined route
Legally a bed and banks, even when bone dry
path of least resistance
Carves canyons by always taking the easy way
ephemeral kind
Some flow only after rain, ghosts on maps
meander mechanics
Curves tighten until rivers strangle themselves into oxbow lakes
water rights
Whole legal wars fought over who drinks first
for instance

amazon river — largest river by discharge, flows 6,400 km through south america

grand canal venice — main watercourse through venice, italy, lined with palaces since 12th century

nile river — longest river at 6,650 km, flows through egypt and sudan

rhine river — flows 1,233 km through germany, france, and netherlands, crucial european shipping route

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