Mass Wasting and Other Hazards Caused by Springsswcssnec.org/pdf/Gary - Mass Wasting and Other...
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Mass Wasting and Other Hazards Caused by Springs Mass Wasting and Other Hazards Caused by Springs Presented at SNEC-SWCS Conference, February 15, 2013, Berlin, CT Gary Robbins Dept. of Natural Resources and the Environment University of Connecticut Storrs, CT 06269 USA [email protected]
Transcript of Mass Wasting and Other Hazards Caused by Springsswcssnec.org/pdf/Gary - Mass Wasting and Other...
Mass Wasting and Other Hazards Caused by Springs
Mass Wasting and Other Hazards Caused by Springs
Presented at SNEC-SWCS Conference, February 15, 2013, Berlin, CT
Gary Robbins Dept. of Natural Resources and the Environment
University of Connecticut Storrs, CT 06269
What is a Spring? Where water table or potentiometric surface intersects
the ground surface
On the Positive Side--
• Healthy water supplies • Used as religious shrines and in ceremonies • Used in treatment of diseases • Today spring water is a major economic commodity
On the Negative Side-- • Look at some UCONN and other nearby examples of springs in action
CESE Horsebarn Hill
N. Hillside
S. Garage
Types of Springs
Water Table Related Perched water table Springs on soil slopes Water channeling Bank storage
Confined Aquifer Related Fractured slopes Confining bed leakage Hot springs
Presenter
Presentation Notes
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Perched Water Table Spring
rock
soil spring
sand
clay
perched water table
Presenter
Presentation Notes
This is a spring formed by water in a perched aquifer flowing over a rock face made of granitic rock. Perched aquifer springs form on slopes intersected by permeable soil overlying rock or sand underlain by clay.
Soil Slope-Water Channeling
Spring after a storm
Channeling
Channeling caused by over steepened area or higher K area
Spying Springs in Snow
Springs at Base of Slope
White Ice Hazard (Horsebarn Hill Rd Spring)
Horsebarn Hill Till
Solifluction (soil creep under saturated conditions)
Center for Environmental Science and Engineering
Piping
Quarry in Willimantic
Spring Induced Landslide (A)
(B)
(C)
(D)
North Hillside Road (Constr. 1989)
Piping
Use of Rip Rap for Drainage and Weight to Prevent Slope Failure
Uphill Propagation of Rotational Slides
Uphill slope failure
Rip Rap Failure
Uphill Slope Failures
Installed Drains
Installed More Rip Rap
Slope Failure Continues
Translational Slide Behind S. Garage (?)
Bank Storage
Fractured Rock Springs
Fractured Rock Spring
Presenter
Presentation Notes
This is an example of a road cut spring. These types of springs often form only on a part of the fracture where the fracture aperture is at its widest.
Bedding Plane Spring
Note: Channeling of discharge
Discharge Under Pressure
Moss Balloons
Rte 2 and 32
Rock Wedge (Freeze -Thaw)
Potential Falling Rock Problem
“Black Ice” Hazards
Bolton
Yes, Mary it is Cold
Ice Art
Flowing Well The sulfur smell could kill you!!
Sulfur Springs, KS
Contaminant Discharge
Iron Oxidation
Presenter
Presentation Notes
The beaker on the left is groundwater at the contamination site. Notice the water is green due to the high iron content. The beaker on the right is a sample of ground water left in the open air for an hour. Note the change in color reflecting iron precipitation and oxidation.
Thanks Questions?
