GEOLOGY

Detailed explanation-1: -Stream discharge is a fundamental measure of water supply in stream systems. Low discharge may cause problems with water supply and fish passage, while high discharge may mean flooding.

Detailed explanation-2: -The deepest part of channel occurs where the stream velocity is the highest. Both width and depth increase downstream because discharge increases downstream.

Detailed explanation-3: -There are several factors that affect stream discharge. The velocity of the water affects it; faster water means more passes per second so more discharge. The width and depth of the river also affects it; a larger river at the same speed will have higher discharge.

Detailed explanation-4: -The increased velocity and the increased cross-sectional area mean that discharge increases.