England’s third dry winter in a row has led British
authorities to call for conservation measures, while China’s government
has warned that two-thirds of the country’s cities face severe water
shortages because of drought and rampant consumption.
“We’ve got a drought here that is now
embracing three winters, and that’s why it’s serious,” said Terry J.
Marsh, head of the National Hydrological Monitoring Programme at the
Centre for Ecology & Hydrology in Britain.
A year ago it was mainly farmers concerned about dry conditions, “but
now concern extends to the environment and most particularly water
resources.”
Prolonged dry spells have threatened parts of China, Russia, Australia, France, Spain, Portugal
and the southern United States in recent years – affecting food output
but also raising worries about the long-term stability of water
supplies.
There is no universal ruling on whether these occurrences are
cyclical nuisances or evidence of changing climate patterns that could
grow more severe in the decades ahead. But there is general agreement
that humans need to change their consumption habits and become more
efficient water users.
“Climate variability is something humanity has faced throughout our
history,” says Jan Lundqvist, senior scientific advisor at the Stockholm
International
Water Institute, “but the severity of the droughts is
increasing.”
Last month, UN officials appealed to the European Union and other
donors for food and water to prevent some 10 million people from
starving in Africa’s parched Sahel region, just months after the worst
drought in more than 50 years caused food crisis in East Africa.
The road to Marseille and Rio
Water regulation and future supply threats are among the topics being
discussed 12-17 March during the World Water Forum in Marseille. EU
leaders also pledge to bring put water conservation on the agenda at the June UN Conference on Sustainable Development in Rio de Janeiro.
The European Commission, which has declared 2012 the Year of Water,
is also preparing to review some of Europe’s water legislation and
policies over the next year.
Droughts can be relatively localised events, as is the case in the
United Kingdom, where the dry spells have affected mainly central,
southern and eastern England while precipitation has been normal in
other areas.
Globally, water problems may have less to do with rainfall than how
water is used – a challenge that will become more profound in the
decades ahead. Earth’s population doubled from 1950 to 1990, and the UN
says it is on course to nearly double again, to more than 9 billion, by
2050.
Pollution and consumption threaten freshwater globally, but even more
so in areas are severely strained today – the urban Middle East along
with South Asia and Africa.
“The constraints of our available water resources become more
apparent day be day,” Hu siyi, a senior Chinese water official, told
reporters last month in warning that two-thirds of the country’s cities
were facing water shortages.
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