(n) - the process by which moving water in a river will erode the sides of the channel wall

(n) - the process by which energy is transformed into other kinds

(n) - the deposit of sediments at the mouth of a river

(n) - an out flowing branch of a river that is located near the mouth

(n) - times when the sun's rays are perpendicular to the equator; March and Sept. 21st

(n) - incoming solar radiation; sunlight

(n) - a line that connects points of the same pressure

(n) - a shallow body of fresh water cut off from a lake

(n) - prevailing tropical winds; blowing northeast in Northern Hemisphere and southeast in Southern Hemisphere

(n) - the gaseous state of water