exorheic system

An exorheic system is an open drainage system where surface waters ultimately flow to the ocean through well-defined patterns involving streams and rivers. This is in contrast to endorheic regions, which are closed systems where surface waters drain to inland termini and evaporate or seep away, often forming saline lakes. Arheic systems have unpredictable, small amounts of water with haphazard drainage patterns. Inland waters, which originate from the ocean through evaporation and are part of the global hydrologic cycle, can be classified as lotic (running-water) or lentic (standing-water) habitats. Drainage basins are areas where all precipitation flows to a single stream or set of streams, with a drainage divide marking the boundary between basins.123