basins and drought

Question 1

Yukon

Answer 1

permafrost dominated basin
climatallogically, these basins have reduced percolation
temps mean increased runoff
gelisols have 40 inches of frozen ground

Question 2

amazon

Answer 2

10% of rain intercepted
hadley cell
deforestation, reduces interception, floods short term, drought long term
soils more susceptible to erosion, siltation in river, increased volume

Question 3

Mississippi

Answer 3

seasonal variability, flows can increase by 70% in autumn
7000 confluences
75% marine clay, low permeability
river dredging and levee building

Question 4

drought

Answer 4

period of time where a location experiences a less than usual amount of precipitation

Question 5

NE china

Answer 5

45% of waste in Yangtzee
1/2 aquifers too polluted for industry
has 6% of worlds freshwater

Question 6

2004 Australia

Answer 6

lack of rainfall in early month of 2004 to make up for 2003 el nino
antecedent conditions

Question 7

Thar Pakar pakistan

Answer 7

one of most densley populated deserts
29% increase in deforestationm in 5 years
80% of aquifers over-exploited
reliant on inconsistent monsoon

Question 8

Sahel

Answer 8

overcultivation, shorter fallow period, depletion of nutrients
increased use of marginal land
replacement of nomadism with sedentarisation
desertification increases run off by 40%
80% of region reliant on agriculture

Question 9

pacific islands

Answer 9

dependent on small aquifers
35% of samoas supply
1997 drought, extraction triples
sw encroachment

Question 10

mexico

Answer 10

urbanisation, aquifer depletion and soil type combine to create subsidence
soft drink companies over abstract form pirvate wells