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Day noise of shouting of water:This world is short of water very much(continue)

provenance:Gz Yibao

Date Added:2006-03-04

Being short of water the biggest influence to the poor people perhaps is a food to produce.At Asia, the people of poor line the following use the income about 60% to purchase the food.According to the estimate of, Asia since 60's in 20 centuries,80% that food boost production comes from irrigating the land above.Therefore, the actual food price has already descended the half many.Was be called the land irrigation of the green revolution, it mainly the direct and indirect function is poor number that reduce Asia.But, because of the water shortage, may make it do things by halves, even rise arrived the contrary function.

The increasingly serious groundwater problem of the groundwater problem is also the most serious problem in the whole water resources management realm.Many countries with big population,such as China, India, in the world, Pakistan, Mexico, and all middle easts and north are not national, at past of about 30 years super adopt the groundwater resources, cause the groundwater gradually dried up.Now, for the management of this kind of precious resources not appropriate, will soon encounter the punishment.Can exaggerate the ground to say nowise, afterward the fruit is disaster, not only to these nation, to the world also will produce the very big influence.

The traditional groundwater problem contain both side.The first, make the fresh water contain the layer of water to descend quickly.The second, is a water level rising that contains the salt alkali with this contrary problem, because of the salt alkali and other poisonous chemical elementses, make contain the layer of water to suffer the pollution.Among them Pakistan is to be subjected to affect the most serious nation.National and many salts of land of °Í lead high, then plus in addition to India river, have no natural passage of other in the river area of India to drain from the agriculture district.Therefore, be the river upper stream to be subjected to salt and other pollutantses pollution, the downstream customer will further be subjected to the pollution influence.The farm crop output reduction, the water can't drink.Still having a latent problem is, be to pollute the water level rising, the dirty water also rises the ground, crosscurrent in village.

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