1. Describe how floodplains, levees, meanders, and oxbow lakes form.
- When a river overflows and covers the valley floor the valley floor is called floodplain
- When a river flows through a floodplain it is curvy and erosion mostly happens on the outside of the river bend and then it becomes so deep there that a meander is formed.
- When deposits seperate a meander from its river its called an oxbow lake.
- When deposits build up near the stream banks and build a natural ridge its called a levee.
2. What are some of the causes of floods?
- Lots of rain, a broken dam or levee, a stream or river overflowing.
3. Describe some of the artificial means used to control flooding?
- Dams, man made levee, flood gate, sandbags are stacked on top of levees, dig ditches, reservoirs.
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4.5/5, good job! You could describe the flood controls also:
ReplyDelete#3: Describe some of the artificial methods used to control flooding.
Levee: a floodwall build along a river bank
Spillways/floodgates: allow diversion of flood waters around high value areas, often through wetlands and to the ocean
Revetment: stabilizing a riverbank to reduce erosion and keep a river in its current channel
Dredging: scooping out sediment in the bottom of a channel to deepen it and allow greater discharge
Dam: a wall build across a river which allows the discharge to be controlled.