Free Newsletters - Space - Defense - Environment - Energy - Solar - Nuclear
..
. Earth Science News .




SHAKE AND BLOW
UI researcher finds human activity muddies causes of Texas floods
by Staff Writers
Iowa City IA (SPX) Aug 12, 2013


Historically, Texas experiences frequent flooding, resulting in numerous fatalities and extensive property damage. In fact, Villarini says, studies show that Texas led the nation in flood-related injuries and fatalities during the period from 1959 through 2005 and that Texas is the only state with fatalities occurring every year from 1960 through 2002.

Periodic flooding in Texas-one the most flood-prone states in the nation-cannot be firmly linked to climate change due to numerous dams and other manmade structures introduced over the years, according to a University of Iowa study.

The researchers also found that tropical cyclones are less responsible for major floods in the region than in the eastern United States.

The study, which looked at 70 years of records, appears in the August 2013 issue of the Journal of the American Water Resources Association.

Lead author Gabriele Villarini, assistant professor in the Department of Civil and Environmental Engineering and assistant research engineer at IIHR-Hydroscience and Engineering, indicates that although the problem is severe, the causes of Texas flooding are less clear.

"In this study, we examined the time series of the largest flood peaks every year from 62 stations in Texas with a record of at least 70 years," he says. "We were interested in examining whether flood magnitudes changed during the study period and, if so, what was the cause of these changes.

"We found that most of the changes we detected were related to human modification of the catchments and more specifically to river regulation."

He points out that there are more than 7,100 permitted dams in Texas, with some 2,000 of them designed for flood control.

"We also examined the link between flooding and tropical cyclones. Tropical cyclones are an important flood agent with regionally varying effects. However, they are not associated with the largest flood events to the same degree we found for the eastern United States," he says.

Historically, Texas experiences frequent flooding, resulting in numerous fatalities and extensive property damage. In fact, Villarini says, studies show that Texas led the nation in flood-related injuries and fatalities during the period from 1959 through 2005 and that Texas is the only state with fatalities occurring every year from 1960 through 2002.

But surprisingly, there are relatively few studies of Texas flooding focused on the long-term changes in hazardous flooding . "Despite the large economic and societal impacts of flooding, there are few studies focusing on changes in annual maximum flood peak distribution in Texas. This is particularly important because of the possible acceleration of the hydrological cycle associated with human-induced climate change, which could potentially result in an increase of floods," he says.

Villarini says that two of his future studies will also focus on flooding and tropical cyclones and their economic impact on the continental United States. His colleague in the study, James A. Smith, is a professor in the Department of Civil and Environmental Engineering at Princeton University.

.


Related Links
University of Iowa
Bringing Order To A World Of Disasters
When the Earth Quakes
A world of storm and tempest






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News





SHAKE AND BLOW
Lourdes closed, 200 evacuated after flash floods
Toulouse, France (AFP) June 18, 2013
French authorities Tuesday shut the grotto at Lourdes and evacuated about 200 people following flash floods at the Roman Catholic pilgrimage site. The preventive measure came a day after heavy rain and unseasonal snowfall in the area led to rivers flowing well above their normal levels, even cutting off some roads. "The Sanctuaries are closed," the local prefecture of the Haute-Garonne a ... read more


SHAKE AND BLOW
Fukushima operator pumps out toxic groundwater

Legacy of 1986 Chernobyl disaster seen in impact on region's forests

Dark tourism brings light to disaster zones

Papua New Guinea opposition challenges asylum deal

SHAKE AND BLOW
New 'weird' material may be new class of solids, researchers say

Large Area Picosecond Photodetectors push timing envelope

Seeing depth through a single lens

Altering organic molecules' interaction with light

SHAKE AND BLOW
Tahiti: A very hot biodiversity hot spot in the Pacific

Greenpeace warns Spain about building on coast

Newly discovered bacterial partnership changes ocean chemistry

Seafood Menus Reflect Long-term Ocean Changes

SHAKE AND BLOW
Arctic sea-ice loss has widespread effects on wildlife

New records for sea ice loss, greenhouse gas in 2012

Santa's workshop not flooded - but lots of melting in the Arctic

New knowledge about permafrost improving climate models

SHAKE AND BLOW
Boom in city beekeeping may not help, could hurt Brit honeybee decline

Is sous vide cooking safe?

Sushi-go-round -- Japan tradition served with technology

Big animals crucial for soil fertility: study

SHAKE AND BLOW
Indonesia volcano spews more ash as hundreds evacuated

Deadly Typhoon Utor strikes Philippines

Sudan flood victims hits 150,000 and rising: UN

6.1 magnitude quake in norther Peru: authorities

SHAKE AND BLOW
Four killed in Ethiopian military plane crash in Mogadishu

Congolese soldiers plead not guilty over Brazzaville blast

Mugabe wins landslide prompts opposition boycott

UN cuts back I. Coast force

SHAKE AND BLOW
Find indicates Neanderthals capable of making sophisticated bone tools

A new archaeological technique gives insight into the day before death

Study explores effects of review setting on scientific peer review

Psychological adaptation to urbanization, technology reflected in word usage over last 200 years




The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement