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My river was formed by rain falling from the sky. Also when the rain
falls it falls into the river. Pushes sand from the mountains and it falls
into the river. When it rains hard it falls on the mountain again but with
more force. More sand comes down into the river and the river takes it into
the ocean. When the river and ocean meet it pushes against each other. The
water is still moving, but then the water starts to slow down.
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When the river takes the sand and a little bit of rocks to the ocean it
becomes 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 the
bottom of the mountains where the river slows down.
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The rock, soil and sand is heavy. When the water slows down the weight
of the sand, rock and soil will cause it to fall or deposit at the bottom
of the mountain, this is what causes alluvial fans.
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The delta is fine dirt and soil mixed together with water to make a
thick mud. There is more mud than water. People have to take the mud out of
the delta because if they don't the boats and ships cannot go through. They
take the mud out of the delta with big tugboats. This helps the river to be
cleared of the mud.
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