Pingie: HTTP:: Human Activities Sink the World 039 s Deltas

HTTP:: Human Activities Sink the World 039 s Deltas
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Scientists at the University of Colorado in Boulder (UCB) have recently released a new report on the situation of deltas around the world, which states that their condition is deteriorating globally. Most at risk is the low-lying variety. Human “improvements” and development made around or on them render them more vulnerable to the effects of ocean storms or river flooding, in most cases. The experts say that tens of millions of people are at risk because of this situation, which is getting worse every year, ScienceDaily reports. One of the most important factors in deltas' sinking is the fact that, on the largest rivers in the world, dams and levees are preventing important amounts of sediments from passing through, and being deposited by the waters where the river meets the sea. As a result, the deltas have no external sediment sources, and start being overrun by the ocean. These formations take millions of years to form at the mouth of a river, but can be covered u!
p within a human life span. “We argue that the world's low-lying deltas are increasingly vulnerable to flooding, either from their feeding rivers or from ocean storms. This study shows there are a host of human-induced factors that already cause deltas to sink much more rapidly than could be explained by sea level alone,&r...
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http://news.softpedia.com/news/Human-Activities-Sink-the-World-039-s-Deltas-122155.shtml
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