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Topic: sinkholes

NASA Radar Demonstrates Ability to Foresee Sinkholes

 

NASA - National Aeronautics and Space AdministrationNASA's Jet Propulsion Laboratory (JPL)Washington, DC – New analyses of NASA airborne radar data collected in 2012 reveal the radar detected indications of a huge sinkhole before it collapsed and forced evacuations near Bayou Corne, La., that year.

The findings suggest such radar data, if collected routinely from airborne systems or satellites, could at least in some cases foresee sinkholes before they happen, decreasing danger to people and property.

Aerial photo of a 25-acre sinkhole that formed unexpectedly near Bayou Corne, La., in Aug. 2012. New analyses of NASA airborne radar data collected in 2012 reveal the radar detected indications of the sinkhole before it collapsed and forced evacuations. Such data may someday help foresee sinkholes. (On Wings of Care)

Aerial photo of a 25-acre sinkhole that formed unexpectedly near Bayou Corne, La., in Aug. 2012. New analyses of NASA airborne radar data collected in 2012 reveal the radar detected indications of the sinkhole before it collapsed and forced evacuations. Such data may someday help foresee sinkholes. (On Wings of Care)

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Five tips to ensure your homeowners insurance stands up in a worst-case scenario

 

Consumer ReportsYonkers, NY – The first six months of 2011 were a tough time to be a homeowner: wildfires in Arizona, New Mexico, and Texas; damaging snow in the Midwest; floods in the Midwest and the Plains; and tornadoes, hail, wind or lightning everywhere east of the Rockies.

Thank goodness for homeowners insurance, right? Yes, provided your insurance coverage was adequate. Consumer Reports Money Adviser spoke to industry groups who found that at least two-thirds of the victims of natural disasters were underinsured. «Read the rest of this article»

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Dunbar Cave State Natural Area Programs for August 25th through August 31st

 

Clarksville, TNDunbar Cave State Natural Area has been a State Park since 1973. The cave and its surrounding 110 acres have considerable scenic, natural and historical significance. The entrance offered shelter to prehistoric Native Americans as far back as 10,000 years.

Dunbar Cave State Natural Area will present many nature programs this summer.

Upcoming events include: Children’s Theatre, Early Morning Nature Hike, Sinkholes, Eyes of the Night, Seeds and so much more!

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Dunbar Cave State Natural Area Programs for August 11th through August 17th

 

Clarksville, TNDunbar Cave State Natural Area has been a State Park since 1973. The cave and its surrounding 110 acres have considerable scenic, natural and historical significance. The entrance offered shelter to prehistoric Native Americans as far back as 10,000 years.

Dunbar Cave State Natural Area will present many nature programs this summer.

Upcoming events include: Night Hike, Snake Tales, Birds, Butterflies and so much more!

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City Council Recap – March 3rd

 

City of ClarksvilleClarksville, TN – The city council held its usual first of the month regular council session.  It was an unusual meeting due to finishing in little over an hour. 

Here are the results on the few major items we had. «Read the rest of this article»

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Bredesen proclaims Oct. 11-17 Earth Science Week in Tennessee

 

Earth Science Week Toolkits Available to Teachers Across the State

eswNashville – Governor Phil Bredesen has proclaimed Oct. 11-17 as Earth Science Week in Tennessee, promoting the important role that geology and other earth sciences play in Tennessee’s safety, health, welfare and economy.

As part of Earth Science Week, the Tennessee Department of Environment and Conservation’s Division of Geology, in partnership with the American Geological Institute, has a limited number of Earth Science Week toolkits to distribute to earth science teachers across the state. This year’s toolkits include posters, calendars, resources and reading materials, field notebooks, and CDs and DVDs, with an emphasis on understanding climate and climate change.

“Earth Science Week provides an opportunity for Tennesseans to seek a greater understanding of the value of research and an appreciation for the importance of finding and conserving mineral, energy and water resources important to the state’s continuing prosperity,” said Bredesen. “I’m pleased we can offer educational tools to earth science teachers to help continue their efforts to raise awareness in the classroom.” «Read the rest of this article»

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A botanical tour of Flat Rock State Natural Area scheduled for Oct. 3

 

Tennessee State ParksThere are a few days left to RSVP for the Botanical Tour of Flat Rock Cedar Glades and Barrens State Natural Area, slated for Saturday, October 3, beginning at 10 a.m. (central).

Reservations are required and the deadline to reserve a spot on the tour is Friday, October 2. For more information or to RSVP, please call (615) 532-1378 or e-mail todd.crabtree@tn.gov.

flatrock-1Flat Rock Cedar Glades and Barrens is one of the most ecologically significant natural areas and serves as an important research natural area. Naturalist Todd Crabtree will lead the tour and participants will get to observe numerous species of rare plants, as they hike along the trail. In addition to observing a variety of habitats, participants will see cedar glades, barrens, woods and sinkholes. Grasses and composites will be the focus, but many other plants will be evident – including a mix of fall foliage and flowers.

The 3.5-mile trail is long and not steep, but footwear with good ankle support is recommended. In case of inclement weather, the hike will be canceled. Participants should bring their own lunch and water and are asked to meet at the Flat Rock Cedar Glades and Barrens parking lot on Factory Road. A map of the area can be found at http://www.tn.gov/environment/na/natareas/flatrock/flatrock.pdf. «Read the rest of this article»

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What is Karst topography and why should you care?

 
karst-map

Karst Hydrology Initiative--Study area showing major karst hydrogeologic settings in the Interior Low Plateaus physiographic region. Areas underlain by Lower-Middle Ordovician limestones shown in brown, and areas underlain by Mississippian limestones shown in green. (USGS Map)

Karst topography describes a landscape abundant in sinkholes, disappearing streams and caves.

According to Dr. Phillip Kemmerly, professor of geology at Austin Peay State University, Clarksville sits in one of the most interesting areas of karst topography in the world.

Clarksville is part of a region known to geologists as the Western Highland Rim Plain. This region includes northern middle Tennessee and extends into western Kentucky where it is called the Pennyroyal Plain and Mammoth Cave Plateau. The only region in the world with more karst features is Slovenia in southern Europe.

Kemmerly divulges that of karst features, sinkholes pose the greatest risk to new and existing construction sites. «Read the rest of this article»

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