Videos: Aquifers, sinkholes, and groundscans –Prof. Don Thieme

We had to move to a larger room, so many attended this groundwater talk at VSU (about 90). Plus a guest appearance by SAVE.

Crowded small room Larger Magnolia Room

Coastal Plain Surficial Deposits, Groundwater Resources, and Recent Subsidence in south Georgia by Prof. Donald M. Thieme @ VSU for WWALS 2013-10-09 Here are Dr. Donald M. Thieme‘s slides in PDF, with his longer title:

Coastal Plain Surficial Deposits, Groundwater Resources, and Recent Subsidence in south Georgia

While we are lucky to have abundant groundwater, both from the Upper Floridan Aquifer 100 feet below us trapped in Eocene limestones and from shallow groundwater with its karst features, nonetheless overpumping has caused falls in the level of the aquifer (about 0.6 feet a year at Valdosta), resulting in rapid loss of shallow groundwater, plus surface water that enters and often contaminates the aquifer through those karst features.

Summary: abundant groundwater from Upper Floridan aquifer and shallow groundwater Summary: Fall in level of upper Floridan aquifer is primary cause for....

Sometimes those karst features subside and manifest as sinkholes like the one that ate Snake Nation Road in Lowndes County and others that can develop slow (many years) or fast (weeks or minutes).

Subsidence Problems in south Georgia and north Florida Snake Nation Road sinkhole

There were also many questions, starting with what water do personal wells reach? Also including a brief history of Valdosta well drilling from artesian to hundreds of feet down, and a sinkhole in a garage in Lowndes County, should local governments require sinkhole insurance (including mention of Moody AFB subsidence and Florida citrus growers pumping so much water it causes sinkholes). I also introduced the WWALS board members present: Gretchen Quarterman (Treasurer and videoing), Bret Wagenhorst (Outings), Heather Brasell (Secretary), Dave Hetzel (President), April Huntley (Director), me (Vice President), and Chris Graham (Member); plus a brief summary of WWALS events and outings. Here’s a video playlist:


Videos: Aquifers, sinkholes, and groundscans –Prof. Don Thieme
Videos by Gretchen Quarterman for WWALS Watershed Coalition (WWALS).
VSU, Valdosta, Lowndes County, Georgia, 9 October 2013.

John S. Quarterman (WWALS VP) introducing Prof. Don Thieme (the speaker):

John S. Quarterman (WWALS VP) introducing Prof. Don Thieme (the speaker)
Picture by Bret Wagenhorst for WWALS Watershed Coalition (WWALS).

Prof. Don Thieme teaching:

Prof. Don Thieme teaching
Picture by Gretchen Quarterman for WWALS Watershed Coalition (WWALS).

Sinkhole on Snake Nation Road with Prof. Thieme:

Sinkhole on Snake Nation Road with Prof. Thieme
Picture by Bret Wagenhorst for WWALS Watershed Coalition (WWALS).

Crowd with Gretchen videoing:

Crowd with Gretchen videoing
Picture by John S. Quarterman for WWALS Watershed Coalition (WWALS),
Lowndes County, Georgia, 9 October 2013.

More pictures on the WWALS flickr account, and as a slideshow:

Students Against Violating the Environment (S.A.V.E.)

S.A.V.E. president Danielle Jordan talked about SAVE’s fossil fuel divestment campaign that the WWALS board voted within the week to support. She also answered questions.

-jsq

1 thought on “Videos: Aquifers, sinkholes, and groundscans –Prof. Don Thieme

  1. Pingback: WWALS files as intervenor to oppose the Sabal Trail Transmission gas pipeline | WWALS Watershed Coalition

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