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This photo released by NASA, and taken from the International Space Station, shows the Mississippi River spilling over its banks in Arkansas and Tennessee in May 2011. Flood control work along the Mississippi River and its tributaries has likely made floods worse in Mississippi and Louisiana, according to a study reported in the journal Nature. Other scientists are not convinced. (NASA via AP)

download ultraiso moi nhat 2013 full crack This photo released by NASA, and taken from the International Space Station, shows the Mississippi River spilling over its banks in Arkansas and Tennessee in May 2011. Flood control work along the Mississippi River and its tributaries has likely made floods worse in Mississippi and Louisiana, according to a study reported in the journal Nature. Other scientists are not convinced. (NASA via AP)

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the prawn cracker wins NEW ORLEANS (AP) — Flood-control work in the Mississippi River and its tributaries has most likely made floods worse in Mississippi and Louisiana, researchers say.

adobe cs6 master collection mac keygen download Looking back at 500 years of data from tree rings and from sediment in oxbow lakes — bends that once were part of the Mississippi River but became lakes when the river changed its path slightly — researchers say the river has flooded more often and poured more water into those states over the past 150 years than in any previous period.

gta 4 100 sorunsuz razor crack denendi Climate change may be responsible for about a quarter of the difference, they estimate. Engineering work, such as that used to build levees and provide a straighter, narrow channel for navigation, is likely responsible for the rest, researchers from Massachusetts, Illinois, Alabama, South Carolina, Texas and Liverpool, England, say in the journal Nature.

auslogics boostspeed 5.0 6 crack Some outside scientists praised the entire paper. Others had compliments for the “paleoflood” work but expressed doubts about the conclusion that flood engineering is the main reason floods are worse.

xin crack game gta 4 Samuel Munoz, a lead researcher at Woods Hole Oceanographic Institution, said he had expected to find that previous floods were greater than more recent floods — not because the river was unrestrained, but because other research had covered a fairly recent period.

crack para sims medieval piratas y caballeros “I just expected that, given more time, you would see events that were bigger,” he said. “Because there’s a longer perspective, there’s more chance for something really big to happen.”

crack gebruikers The researchers said climate variability, particularly the multi-decade changes in the North Atlantic’s surface temperature, has played a big part in flooding over the centuries. However, they said, changes in such cycles would predict a much smaller increase than has occurred since 1800.

free youtube downloader with crack “The other likely culprit is something we’ve done to the river or basin,” Munoz said. The Mississippi River Basin drains all or part of 31 states and two Canadian provinces.

pobierz crack do fifa 10 chomikuj.pl “Their palaeoflood record is compelling. … And if the authors are correct, and collective efforts to subdue the Mississippi have inadvertently pushed it to rise higher than ever, then the time might have come to consider loosening its restraints,” Scott St. George of the University of Minnesota wrote in a companion commentary.

tai beach head 2002 crack However, he wrote, he thinks climate change could be the main driver. Testing that hypothesis will require more work like Munoz’s along the upper Mississippi and its main tributaries, he said. Munoz said he and his colleagues are working on such studies.

black and white no cd crack 1.10 “We have records we’re working on now from the Missouri River, the Ohio River and the Arkansas River — the big tributaries of the Mississippi. … We’re also doing this in the Houston area to put Hurricane Harvey into context,” Munoz said.

crack gta sa tpu Such work isn’t possible on the upper Mississippi, where locks and dams have permanently submerged oxbow lakes, he said.
Upmanu Lall, director of the Columbia Water Center at Columbia University, said the work linking “floodiness” to climate cycles over five centuries holds water.

cracker barrel san antonio i 10 But the connection to river engineering is weak, Lall said. For one thing, he said, recent floods have included some very low as well as very high floods, but small floods probably didn’t leave sediment or tree-ring records. The recent flood analysis also doesn’t offer any formal analysis of likely causes and ignores whether increased rainfall or changes in the landscape, such as drainage project undertaken on Midwestern farms, might be among them, he said.

programas para hackear contraseñas de facebook 2012 Nicholas Pinter of Southern Illinois University at Carbondale said the study confirms and underscores what he described as extensive work he and others have done about flood frequency and magnitude over the past 100 to 150 years, as well as modeling studies that look forward.

telecharger fraps cracké francais It’s particularly notable that the study found large increases “along a stretch of the Mississippi that previous research has among the LEAST impacts of river engineering on flood levels,” he wrote in an email. “If the same research had been completed on the Middle Mississippi, the Lower Missouri, or parts of the Upper Mississippi, the increases in flood magnitudes and frequencies would have been MUCH greater.”

pro tools xvx crack Munoz studied three oxbow lakes: Lake Mary, west of Woodville, Mississippi; False River Lake, northwest of Baton Rouge, Louisiana; and Lake St. John, in Louisiana about north-northwest of Natchez, Mississippi.

taj game dat boom crack The scientists also used tree-ring data from a 2015 study by University of Alabama scientist Matthew Therrell, including three floods not described in that report.

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