What percentage of the total runoff on every continent do dams and reservoirs control?

away from the curb

explanation:

the wheels would then hit the curb if it started to rolling, decreasing the chance of an accident.

indicate valleys, hills, steepness and gentleness of slopes.

explanation:

contour lines on a map indicate elevation, or depth. numeric notations on contour lines refer to the level of elevation, or height about sea level.