Introducing Large Rivers. Avijit Gupta
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Название: Introducing Large Rivers

Автор: Avijit Gupta

Издательство: John Wiley & Sons Limited

Жанр: География

Серия:

isbn: 9781118451434

isbn:

СКАЧАТЬ a necessary volume of water, large enough to nourish the main stream. At least part of the basin should be in an area of high rainfall so that the main river can be sustained all along its course. The volume of discharge may be annually seasonal, and also may vary over a group of years as directed by climate drivers such as ENSO. The drainage basin may contain sources of high sediment production which commonly comes from a high relief and erosive fold mountain. Sediment grains in long rivers tend to demonstrate size-sorting and quartz enrichment in the downstream direction. Many large rivers transport and store sediment also in a lateral direction, producing dynamic growth and decay of floodplains. Very large volumes of water and sediment are generally needed to sustain large rivers but the patterns of their supply and distribution are different.

      Questions

      1 Explain the difference between discharge and runoff.

      2 What are the sources of big discharges of large rivers? Give examples.

      3 Explain the difference between barotropic and barclinic conditions. How do they relate to large rivers?

      4 What is a climate driver? How does a short-term climate driver relate to floods and dry conditions?

      5 Name five large rivers that flow through arid environments. How do they make it possible?

      6 Explain the lateral transport and storage of sediment in large rivers. What effect does it have on floodplains?

      7 Describe the changes in sediment of a large river moving downslope.

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