Why the width of the river is not the same from its start to its end?

Answer 1

Two main reasons ...

1) It's not carrying the same amount of water from start to finish. In general, the further downstream you go, the more water you have. (The Colorado River is a BIG execption to this, though.)

2) The river doesn't flow through the same type of terrain all the way. When the river's flowing through mountains, it'll be a narrow stream because it's confined to a gorge. When it's on open flatlands, it'll be wider because it doesn't have the mountains stopping it from spreading out.

Answer 2

The water flow is different in the start and the end. The water carried away the earth and widens the area of the river. At the beginning there is not enough water to do that. So the river is narrow and when eventually a mass amount of water try to flow thru the narrow land, it keeps taking off earth from two sides, hence creating a large distance between two shores.
This is kind of a math based question.

Answer 3

A big river is a stream at the start. Just like a baby before becoming a man/woman. More streams added to become a finally big river.

Answer 4

because a river starts in the mountains with little streams of water so when the little streams join together it isn't very big.but then as it goes further down themoutain it collects more water from othe places or rivers so it gets bigger and bigger.

Answer 5

Because rivers are not part of your cartoon world.