Yielding supplies of any kind; serving to form or make up, a greater object of the same kind, as a part, branch, etc.; contributing; as, the Ohio has many tributary streams, and is itself tributary to the Mississippi.
geographical description of a river that empties into another river, lake, or into the sea. Tributaries can form large wetland regions known as deltas and estuaries. In anglerâ€™s lexicon, the fishable portion of a tributary is often called the â€œmouthâ€ of a river.
A tributary is generally regarded as a surface water drainage system which is interconnected with a river system. Under Colorado law, all surface and groundwater, the withdrawal of which would affect the rate or direction of flow of a surface stream within 100 years, is considered to be tributary to a natural stream.
A tributary (or confluent/affluent) is a stream or river which flows into another river (a parent river) or body of water but which may not flow directly into the sea. In orography, tributaries are ordered from those nearest to the source of the river to those nearest to the mouth of the river. A confluence is where two or more tributaries or rivers flow together.