The drainage basin

• The water shed: Area or edge of land that separates water flowing into different rivers, basins, or seas.
• Source of river: Where the river starts (usually high up the mountains)
• Mouth of river: Where the river meets the sea.
• Confluence: Where 2 or more rivers join to form into one single channel.
• Tributary: A river or stream flowing into a larger river or lake.
• drainage system: Form which all precipitation flows into a single stream or set of streams.