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Water Erosion

Water Erosion. Where does a river get its water? Where does this water ultimately come from?. Moving water is the major agent of erosion that has shaped Earth’s surface Water can pick up soil particles and move them ( erosion ) or drop them off ( deposition ).

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Water Erosion

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  1. Water Erosion

  2. Where does a river get its water? • Where does this water ultimately come from?

  3. Moving water is the major agent of erosion that has shaped Earth’s surface • Water can pick up soil particles and move them (erosion) or drop them off (deposition)

  4. Water that moves over Earth’s surface is called runoff • Five factors that affect amount of runoff: • Amount of rain • Amount of plants • Type of soil • Shape of land • How people use the land

  5. A gully is a large groove, or channel, in the soil that carries runoff after a rainstorm • A stream is a channel along which water is continually flowing down a slope • A tributary is a stream that flows into a larger stream

  6. Gully

  7. Tributary

  8. Erosion by Rivers • A river creates valleys, waterfalls, flood plains, meanders, and oxbow lakes • Rivers create “v-shaped valleys” • The flat, wide area of land along a river is called a flood plain

  9. A bend in a river is called a meander • Sometimes a meander can be cut off to form an oxbow lake

  10. Deposition by rivers • Deposition creates alluvial fans and deltas

  11. Alluvial Fanwide, sloping deposit of sediment formed when stream leaves mountain

  12. Delta Sediment where a river meets the ocean

  13. How can water move soil and sediment? • In what ways do rivers flow? • Where would you find a delta in the United States?

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