Dunes are about 10 or more centimeters in height and are spaced a meter or more apart and are common in streams with high velocities. Also see sand dune . An extensive region covered by numerous sand dunes . Dust Dome Dome of air that surrounds a city created from the urban heat island effect that traps pollutants like particulate matter. Drainage Basin Land surface region drained by a length of stream channel .
Drainage Density Is the measure of the length of stream channel per unit area of drainage basin.
Drainage Network System of interconnected stream channels found in a drainage basin . Drainage Pattern Geometric pattern that a stream 's channels take in the landscape. These patterns are controlled by factors such as slope, climate, vegetation, and bedrock resistance to erosion . A wind common to mountainous regions that involves heavy cold air flowing from high to low elevations because of gravity . Also see katabatic wind .