Friday, October 29, 2010

Sinkhole causing concern at dam in Ladysmith

Below is a story from the Leader-Telegram and Associated Press. I found this particularly interesting because of the damage that could occur all along the river if the dam fails. The news stories haven't been very detailed, so it's hard to get a grasp how big the sinkhole is and potential threats it poses. But other stories reported that the river is up 7 feet in Eau Claire because of controlled water release upstrem to relieve pressure on this dam, so  I have to imagine if something went wrong, many people could be affected.


LADYSMITH - The National Weather Service has issued a flash flood warning for residents downstream of the Big Falls Hydro Dam near Ladysmith after a sink hole was developing at the dam.
Xcel Energy Tuesday advised the service that there was potential for a dam failure. The company is keeping a round-the-clock watch on the dam near Ladysmith after a small sinkhole developed in an earthen embankment.
The utility implemented a watch condition for potential dam failure Tuesday as rain fell in western Wisconsin.
Xcel spokeswoman Liz Wolf Green says the sinkhole was discovered in an embankment to the east of the powerhouse.
As a precaution, Xcel is lowering the reservoir 6 inches an hour for 24 hours, to bring the water level down by 12 feet and relieve pressure.
There are no evacuations, the the weather service said a flash flood warning would be issued if dam failure was imminent.
The dam is located on the Flambeau River about seven miles north and east of Ladysmith. The flash flood watch extends from the dam to the Rusk County airport.

More than 400 dead as result of volcano, tsunami in Indonesia

Below is an article about the aftermatch of a volcano eruption and tsunami in Indonesia. As I read the story, I instantly found it easy to look at the event using the complexity paradigm. The sequence of events in this disaster clearly show that they are part of a much larger picture of activity. Both tsunamis and volcanic eruptions originate with tectonic activity. So it is not surprising that Indonesia fell victim to such an event, as it lies on plate boundary that also happens to be a part of the Ring of Fire.
 
Gembong Nusantara A villager walks past a buffalo killed in Mount Merapi eruption in Kinahrejo, Yogyakarta, Indonesia, Wednesday, Oct. 27, 2010. A volcanic eruption and a tsunami killed scores of people hundreds of miles apart in Indonesia, spasms from the Pacific Ring o
Posted: Friday, October 29, 2010 12:00 am
MENTAWAI ISLANDS, Indonesia (AP) - The fisherman was jolted awake by the powerful earthquake and ran with his screaming neighbors to high ground. He said they watched as the sea first receded and then came roaring back "like a big wall" that swept away their entire village.
"Suddenly trees, houses and all things in the village were sucked into the sea and nothing was left," Joni Sageru recalled Thursday in one of the first survivor accounts of this week's tsunami that slammed into islands off western Indonesia.
The death toll rose today to 393 as officials found more bodies, although hundreds of people remained missing. Harmensyah, head of the West Sumatra provincial disaster management center, said rescue teams "believe many, many of the bodies were swept to sea."
Along with the 33 people killed by a volcano that erupted Tuesday more than 800 miles to the east in central Java, the number of dead from the twin disasters has now reached 426.
After a lull that allowed mourners to hold a mass burial for victims, Mount Merapi started rumbling again Thursday with three small eruptions and another one early today. There were no reports of new injuries or damage.
The catastrophes struck within 24 hours in different parts of the seismically active country, severely testing Indonesia's emergency response network.
Aid workers trickling into the remote region found giant chunks of coral and rocks in places where homes once stood. Huge swaths of land were submerged. Swollen corpses dotted roads and beaches.
In a rare bright spot, an 18-month-old baby was found alive Wednesday in a clump of trees on Pagai Selatan - the same island where the 30-year-old Sageru lived. Relief coordinator Harmensyah said a 10-year-old boy found the toddler, whose parents are both dead.
More than 100 survivors crowded a makeshift medical center in the main town of Sikakap on Pagai Utara - one of the four main islands in the Mentawai chain located between Sumatra and the Indian Ocean.
Officials say a multimillion-dollar tsunami warning system that uses buoys to detect sudden changes in water levels broke down a month ago because it was not being properly maintained. The system was installed after a monster 2004 quake and tsunami that killed 230,000 people in a dozen countries.
A German official at the project disputed there was a breakdown, saying Monday's 7.7-magnitude quake's epicenter was too close to the Mentawai islands for residents to get the warning before the killer wave hit.
"The early warning system worked very well - it can be verified," said Joern Lauterjung, head of the German-Indonesia Tsunami Early Warning Project for the Potsdam-based GeoForschungs Zentrum. He added that only one sensor of 300 had not been working and said that had no effect on the system's operation.
At the Mount Merapi volcano, hot clouds of ash spewed from the mountain at 6:10 a.m. today, according to the Indonesian volcanology agency Subandriyo.
It was unclear whether the new activity was a sign of another major blast to come.
A young woman named Adek sobbed uncontrollably as she tried to talk about her year-old baby who was washed away. "Oh, don't ask me again," she said, wiping her tears and turning away.
One of the hardest hit areas with 65 dead was the village of Pro Rogat, on Pagai Seatandug island.
Villagers there huddled under tarps in the rain and told how many people who had fled to the hills were now too afraid to return home.
Mud and palm fronds covered the body of the village's 60-year-old pastor, Simorangkir. He lay on the ground, partially zipped into a body bag. Police and relatives took turns pushing a shovel into the sodden dirt next to him for his grave.
His 28-year-old grandson, Rio, traveled by boat to Pro Rogat from his home on a nearby island to check on his relatives after the quake and tsunami. He said he was picking through the wreckage when someone cried out that he had found a body.
Rio walked over and saw the face of his dead grandfather, partially buried under several toppled palm trees, looking back at him.
"Everybody here is so sad," Rio said, as relatives prepared to lay his grandfather in the grave.
Residents from Kinahrejo, Ngrangkah, and Kaliadem - villages that were devastated in Tuesday's blast - crammed into refugee camps. Officials brought cows, buffalo and goats down the mountain so that villagers wouldn't try to go home to check on their livestock.
Thousands attended a mass burial for 26 of the victims six miles (10 kilometers) from the base of the volcano. Family and friends wept and hugged one another as the bodies were lowered into the grave in rows.
---
Associated Press writers Achmad Ibrahim in the Mentawai islands, Slamet Riyadi at Mount Merapi and Irwan Firdaus in Jakarta contributed to this report.


Friday, October 22, 2010

More earthquakes near or in Haiti likely

From the US Geological survey:

The January 2010 M7.0 earthquake that devastated Haiti’s economy and caused over 200,000 casualties also resulted in significant uplift of the ground surface along Haiti’s coastline, and involved slip on multiple faults, according to a study published online in Nature Geoscience.
Because the earthquake did not involve slip near the surface of the Earth, the study suggests that it did not release all of the strain that has built up on faults in the area over the past two centuries, and so future surface rupturing earthquakes in this region are likely.
The paper also suggests that similar events may be hidden from the prehistoric earthquake record both in Haiti and in other similar tectonic settings such as the San Andreas fault in California.
Gavin Hayes, a U.S. Geological Survey geophysicist, along with colleagues from USGS, California Institute of Technology, NASA's Jet Propulsion Laboratory (JPL), and the University of Texas at Austin, used a combination of seismological observations, geologic field data and satellite geodetic measurements to analyze the earthquake source. Initially the Haiti earthquake was thought to be the consequence of movement along a single fault, which accommodates the motion between the Caribbean and North American plates.
By modeling the patterns of surface deformation, the team was able to assess which fault was responsible. Their results showed that the earthquake may not have been caused by the simple rupture of a single fault, but instead may have involved a complex series of faults.
The pattern of surface deformation was dominated by movement on a previously unknown, subsurface thrust fault, named the Léogâne fault, which did not rupture the surface.
Hayes, a post-doctoral researcher, is contracted to work for the USGS by Synergetics, Inc.
This is one of several papers to be published this month in a special issue of  Nature Geoscience on the Haiti earthquake.

http://www.usgs.gov/newsroom/article.asp?ID=2612&from=rss_home

Friday, October 8, 2010

Wetlands destructing may have made Arcadia flood worse

Below is an interesting story writtend by Doug Erickson of the Wisconsin State Journal, published Oct. 2. It's an interesting arguement that may never be resolved. Had Ashley not built there would the flood have been less damaging? One of the most interesting factors in the story is the amount of jobs created by building Ashley in Arcadia. It seems like you hear that everywhere now ... since the economy is bad, any time jobs will be created it seems like all other concerns fall to the wayside. But are jobs worth the destruction a small town?

buy this photo Canoeists paddle past an Ashley Furniture building in Arcadia Sept. 23, the day the company shut down production due to flooding. DAN REILAND – Associated Press
  • Midwest Flooding
  • Map of Ashley Furniture plant

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Flood insurance

Residences and businesses in Arcadia can purchase flood insurance through the National Flood Insurance Program because the city is in a flood-prone area and its elected officials have agreed to participate in the program, said David Schein, a regional flood insurance liaison with the Chicago office of the Federal Emergency Management Agency.
The federal Privacy Act of 1974 prohibits FEMA from releasing the names of companies or homeowners who participate, he said. An Ashley Furniture spokeswoman said she did not know if the company participates.
Congress created the program in 1968 to encourage community flood plain management and to provide protection for property owners in hard-to-insure areas.
Although the program is backed by the federal government, the insurance is sold through private insurance companies and agents, Schein said. Claims are paid out of a fund that program participants contribute to through their insurance premiums, he said.
After Ashley Furniture received a state permit five years ago to fill in 13.5 acres of wetlands for a factory expansion in Arcadia, opponents warned of environmental consequences.
Wetlands serve as “natural hazard insurance against flooding,” the Wisconsin Wetlands Association said at the time.
So when widespread flooding in Arcadia temporarily closed Ashley Furniture 10 days ago, and photos showed canoeists paddling by a company loading dock, old arguments resurfaced.
“No one can say, ‘If only there had been more wetlands there, this wouldn’t have happened.’ But can we say there would have been less of an impact? Definitely,” said Becky Abel, executive director of the wetlands association.
But Ashley Furniture and the state Department of Natural Resources, which approved the permit, say critics are off base. The water swamping the city is coming primarily from the overflow of two upland creeks, Turton Creek and Meyers Valley Creek, not the adjacent Trempealeau River, they say. The areas of land that drain into those creeks, called watersheds, are several miles east and south of Arcadia, yet the city is at the mercy of the small creeks by being downstream.
“It’s one of those things you can’t plan for,” said Dan Baumann, a regional DNR water leader in Eau Claire who was part of the team that approved the permit. “I don’t know that their filling in of the wetlands would have caused any additional impact.”
The permit area on Ashley’s property “was not, in whole or in part, a cause or a contributing factor to the recent flooding,” said Paulette Rippley, an Ashley Furniture spokeswoman.
Extended debate
The company’s efforts to expand into wetlands played out over more than a decade beginning in the mid-1990s and spurred charges of strong-arm political tactics against Ashley Furniture and of job-killing extremism against environmentalists.
If the permit had not been granted, about 2,000 jobs — “substantially all of Ashley’s Arcadia facilities” — would have been moved to another state, Rippley said this week. The company, based in Arcadia, creates an economic ripple effect in Wisconsin conservatively estimated at more than $270 million annually, she said. The city is about 45 miles northwest of La Crosse.
Even the one-day shutdown of production at the Arcadia plant Sept. 23 hit community members hard.
“They’re the county’s largest employer,” said Dan Schreiner, Trempealeau County emergency management director. “It’s pretty traumatic when they’re not working.”
Ashley Furniture has estimated “uninsured losses and damages” due to the flooding of $3.51 million, according to information the company provided the county on Tuesday. In addition, the company projected $2.75 million in “lost wages by hourly employees and lost sales by local Ashley suppliers.”
Rippley said the company’s information technology building in downtown Arcadia was particularly hard hit. About 100 computer technicians and programmers work there, and a significant amount of computer equipment not covered by insurance was heavily damaged, she said.
Permit approved
Although sympathetic lawmakers initially sought to exempt Ashley Furniture from state wetlands laws, the company ultimately secured permission to fill in the wetlands in 2005 through the regular DNR permitting process.
Parts of the Ashley Furniture complex exist within the Trempealeau River floodplain, and the company followed all rules for building in that flood plain, Baumann said. The problem with this flooding is that the water comes largely from creeks so small their floodplains have not been studied or mapped, he said.
Others say there has been a longtime pattern in the area of incrementally degrading and eliminating wetlands — by Ashley Furniture and others — and that the cumulative effect has made Arcadia more vulnerable to flooding.
“There’s no doubt that at least some potential protection would have been afforded by not filling in so much of that river bottom,” said George Meyer, executive director of the Wisconsin Wildlife Federation and DNR secretary from 1993-2001.
Wetlands “hold a lot of water and release it slowly over time, which reduces the flooding of agricultural and residential areas,” said Keith Reopelle, policy director for Clean Wisconsin. “I think you have to admit that filling in that wetlands area has exacerbated the impact of flooding.”
Ashley Furniture mitigated the loss of the 13.5 acres of wetlands by creating wetlands elsewhere more than double the size. The 34.5-acre project cost Ashley about $1 million and included the planting of 6,400 trees and 43,500 plants, Rippley said.
Also, Ashley improved a dike along Meyers Valley Creek, which likely reduced the amount of recent flooding in Arcadia, and it has assisted the city in improving lift stations to remove flood water, Rippley said.
Abel, of the Wisconsin Wetlands Association, said mitigation programs can be successful, but not this one. The wetlands that were created are in a different watershed than those eliminated, so their function in the watershed around Ashley Furniture was not replaced, she said.

Saturday, October 2, 2010

Preparing for a volcano

I found this article on the USGS site about volcanic activity in the Arabian Desert. I find it really interesting that you don't hear more about these types of events, especially if this many people were evacuated and the potential for danger is so great:

http://www.usgs.gov/newsroom/article.asp?ID=2603&from=rss_home