My river was formed by rain falling from the sky. Also when the rainfalls it falls into the river. Pushes sand from the mountains and it fallsinto the river. When it rains hard it falls on the mountain again but withmore force. More sand comes down into the river and the river takes it intothe ocean. When the river and ocean meet it pushes against each other. Thewater is still moving, but then the water starts to slow down.

When the river takes the sand and a little bit of rocks to the ocean itbecomes an alluvial fan. The alluvial fans is made of sand, soil and rocks.The alluvial fans looks like a triangle shaped hill. It is found on thebottom of the mountains where the river slows down.

The rock, soil and sand is heavy. When the water slows down the weightof the sand, rock and soil will cause it to fall or deposit at the bottomof the mountain, this is what causes alluvial fans.

The delta is fine dirt and soil mixed together with water to make athick mud. There is more mud than water. People have to take the mud out ofthe delta because if they don't the boats and ships cannot go through. Theytake the mud out of the delta with big tugboats. This helps the river to becleared of the mud.

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