Haha Essay

608 Words3 Pages
The features of the upper course: Most vegetation, less impact V-shaped valley(steep sloping) Lateral and vertical erosion has not yet occurred Waterfalls Gorges Tributaries Rapids Interlocking spurs Springs The main features of the middle course: The river has a great sediment load. The has a greater discharge than the upper course. The valley has a broad, flat floor(flood plain)hardened by gentle slopes called bluffs. Meanders-regular curves where the river erodes the valley sides, just on one bank then to another. How some of the features of the upper course are formed: Waterfalls are formed, when a river plunges vertically downwards over a rock face. Gorges are formed, as the waterfall retreats upstream, a long gorge develops below it. A river gorge is a very narrow, steep-sided valley. Rapids are formed, when a river which is flowing very fast down a steep slope and rocks are exposed at the surface, but the river does not plunge vertically downwards. Springs may be formed in any sort of rock. A spring is a water resource formed when the side of a hill, a valley bottom or other excavation intersects a flowing body of ground water at or below the local water table, below which the subsurface material is saturated with water. A spring is the result of an aquifer being filled to the point that the water overflows onto the land surface. They range in size from intermittent seeps, which flow only after much rain, to huge pools flowing hundreds of millions of gallons daily. Tributaries are formed by erosion and water, when a river receives water from a smaller stream or river flowing into it. A drainage basin is a naturally occurring extent of land which serves as a funnel to channel precipitation and excess water to a nearby river or stream. Characteristics of the upper course: A narrow, steep-sided valley with a V-shaped cross-section;

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