Chapter 9 Water Erosion and Deposition. 9.1 Water Erosion and Deposition Notes Sheet. Runoff. Water that flows across the Earth’s surface is called runoff . The water does not soak into the ground or evaporate . Runoff.
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9.1 Water Erosion and Deposition
Larger heavy particles called the bed load just roll along the bottom of the stream channel.
These stages depend on the slope of the ground over which the stream flows.
The names of the stages of development are not always related to the actual age of the river.
A young stream may have whitewater rapids and waterfalls.
Has a high level of energy and erodes the stream bottom faster than the sides.
Erosion is no longer concentrated on the bottom of the stream channel.
A mature stream erodes more along the sides and curves develop. These forms form because the speed of water changes throughout the width of the channel.
Water in shallow area of a stream moves slower because it drags along the bottom
In the deeper part of the river, the water moves faster.
An old stream flows smoothly through a broad floodplain.
Major river systems contain streams in all stages of development.
When a river system has too much water in it, floods can occur. These can be catastrophic and cause major damage.