RIVER PROCESSES AND PRESSURES

FLOODING
1. BANGLADESH
  1. 8th July 2004- September
  2. multiple cyclones and the Himalayas melting
  3. 800,000 ha flooded
2. BOSCASTLE
  1. 18th august 2004
  2. 600mm of rain in 2 hours
  3. £4.6 million worth of repairs
  4. hurricane Alex
3. STORM HYDROGRAPH
  1. lag time
  2. rising limb / falling limb
  3. peak rain fall / peak discharge
4. discharge
  1. amount or type of rainfall,temprature
  2. rock type permeable/inprmeable
  3. previous weather conditions
5. causes
  1. physical-prolonged rain
  2. deforestation
DAMS AND RESOVIORS
1. Kielder water Northumberland
  1. £167 million to build
  2. took 7 years to build
  3. advantages
    1. supplies water to NW england
    2. brings tourisum to the area
    3. looks good
    4. £6 million a year
  4. disadvantages
    1. 7 familes and farming communities were rehomed
    2. its never been less than 90% full sop some say its useless
    3. 1.5 million trees chopped down
    4. flooded a previously existing valley
    5. forestry commission employees lost jobs
  5. its sustainably managed
    1. each year the forestry coummision plant 3.5 million trees to replaced the cut down ones
  6. opened in 1982
  7. dam
  8. has an obsorbortory
landforms
1. WHAT THE HELLS AN OX BOW LAKE
2. waterfall
3. gorges
4. valleys
proceses
1. erosion
  1. solution
  2. attrition
  3. hydrochloric action
  4. abrasion
2. deposition
river valleys
1. long profile
  1. upper
  2. lower
  3. middle
2. cross section
managing rivers
1. ENGENERING
  1. HARD
    1. THREE GORGES DAM
      1. IN CHINA $22.6 BILLION TO BULID AND IS IN CHINA
    2. leves and channel straightening
  2. SOFT
    1. forestry programs
    2. flood warning scheme
    3. do nothing
river tees
1. starts off in a mash where 120ml of water gets stored up
2. middle course wide and deep
3. lower course is industrial
4. just south of Newcastle and east of Middlesbrough

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RIVER PROCESSES AND PRESSURES

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	Creado por Alex Gray hace casi 9 años