Although the peoples roar like the roar of surging waters,
when he rebukes them they flee far away,
driven before the wind like chaff on the hills,
like tumbleweed before a gale.
Isaiah 17:13 NIV
- Drainage basin (Wikipedia)
A drainage basin is an area of land where all flowing surface water converges to a single point, such as a river mouth, or flows into another body of water, such as a lake or ocean. A basin is separated from adjacent basins by a perimeter, the drainage divide, made up of a succession of elevated features, such as ridges and hills. A basin may consist of smaller basins that merge at river confluences, forming a hierarchical pattern.