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Q1.
Actual evaporation is the amount of water that would evaporate due to
atmospheric demand if water
supply were unlimited.
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Q2. Hydraulic
conductivity relates to the porosity of rock or soil.
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Q3.Under
the Ramsar definition, lakes, rivers, ponds, marshes, fens, bogs, swamps,
reed beds, shallow coastal waters,
mangroves and peatlands can all be classified as wetlands.
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Q4.
Floods are natural events.
Q5.
The impact of a flood on humans depends upon the
amount of development on the floodplain.
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Q6.
The flood return period predicts the number
of years when a particular size of flood will return at regular intervals.
Q7.
The World Meteorological Society estimate
that the population living in water-scarce countries will rise to between
1 billion and 2.4 billion by 2025.
Q8.
The main use of water across the globe
is for agriculture.
Q9.
Fertigation is a method of delivering
fertilizers for example in irrigation water.
Q10.
Overexploitation of groundwater can result
in saltwater intrusion in coastal areas.
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Q11.
Diffuse pollution is much more difficult to isolate, identify and treat
than point pollution.
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Q12. Sources
of nitrates and phosphates include sewage effluent, detergents and industrial
effluent.
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Q13. Cholera
is not linked to drinking water supplies.
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Q14. Groundwater
is always safe to drink.
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Q15. The
objective of the EU Water Framework Directive is to attain an ecological
quality for all waters that is close to unspoiled or pristine conditions
by the year 2010.
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© copyright Hodder Arnold 2004
