Rivers - KQ4 (management challenges with development of rivers) Flashcards Preview

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Flashcards in Rivers - KQ4 (management challenges with development of rivers) Deck (8)
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1
Q

What are the management challenges for the River Severn?

A
  • Discharge from sewage works = reduces water quality
  • Need for new homes = build on floodplain
  • Pollution is a pressure on water environment
  • Physical modification needs to be addressed in order to achieve more natural functioning of wetland ecosystems and to protect fish
  • Sea level rise poses threats
  • Cost = who should pay?
  • Needs maintenance of water resources for people and environment
2
Q

What are the management strategies in the Severn?

A
  • Controlling agricultural pollution from nitrates by further regulation
  • Creation of new wetlands
  • Protection of high quality coarse and game fishing areas (eg. Cound Brook)
  • Managing recreational development
3
Q

Why does the Severn need management?

A
  • Multiuse/shared catchment
  • Limited water supply = concerns over maintaining water resources for people/environment
  • Competing needs = discharge from sewage works = impacts water quality
  • Pressure from lots of uses = more vulnerable to flooding
    ISSUES with water:
  • Pollution from rural areas and waste water
  • Physical modification needed?
  • Pollution from towns, cities and transport
  • Changes to natural level and flow of water
  • Negative impacts of non-native species
4
Q

What are the management challenges for the Nile?

A
  • Lake Nasser Aswan high Dam = loss of soil fertility downstream as plains no longer flooded with alluvium = artificial fertilisers now used
    = Stagnant water downstream of Dam = good breeding ground for parasites and insects (eg bilharzia)
  • Lake Manzala = highly polluted due to lack of waste water treatment = quality needs to be improved
5
Q

Why does the Nile needs to be managed?

A
  • Limited water supply = shared water supply equally = no shortage downstream
  • Competing needs = discharge from sewage works = impacts water quality
    = Construction of something (Aswan Dam) can lead to less alluvium on flood plains = artificial fertilisers used
6
Q

What are the socio-economic needs in the development of the Aswan Dam?

A
  • Generate electricity

- Provide water for drinking and irrigation = more crops = less hunger and more jobs

7
Q

What are the environmental needs in the development of the Aswan Dam?

A
  • Reduce flooding = can store two years of Nile flows
    = Lake Nasser = 500m deep, 10km wide and over 500km long
  • Protect areas from drought by storing water (in Lake Nasser)
8
Q

Was the Aswan Dam building about balancing socio-economic and environmental needs?

A
  • Dam construction aids economic prosperity = reduces floods and droughts in Egypt
  • Now a tourist attraction = more employment and wealth
  • River levels remain steady all year
  • Cultivated (farmed) land increased from 4% to 8%