| http://www.w3.org/ns/prov#value | - Networks of channels drain into a river to form a watershed. ??? ??? ??? Divides the ridges and other elevated regions that separate watersheds. ??? ??? ??? Floodplain a flat area along a river formed by sediments deposited when the river overflows, usually providing rich soil for farming. ??? ??? ??? Dams & Levees built to control floods; dams are concrete structures built on a river to regulate
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