What Lies Beneath?

Three UNG programs join forces to solve the two-fold problem of soil erosion and polluted waterways.

North Georgia’s rivers, lakes and streams supply the region with water for drinking, farming and recreation, so keeping the waterways free of sediment and bacteria from warm-blooded animals is important, according to Dr. Justin Ellis, director of UNG’s Environmental Leadership Center (ELC).

“Millions of people drink the water from the Upper Chattahoochee River Basin,” Ellis said.

A potential solution to improve water quality and reduce pollutants lies with new collaborations between UNG’s ELC water quality lab, the Lewis F. Rogers Institute for Environmental and Spatial Analysis (IESA), and Chestatee Restoration projects.

On the front end, the water lab has been sampling the water of the Upper Chattahoochee River Basin to find poor water quality spots for several years. Supervised by Ellis, UNG students test for several parameters and pay particular attention to two: bacteria from warm-blooded animals and soil sediment.

“We ask if it is meeting the state’s standards of being clean and safe for fishing, swimming and drinking,” Ellis said, adding bacteria in the water, such as E. coli, has the potential to cause intestinal illnesses in humans.

Soil, or sediment, flowing into waterways also causes problems, said Dr. Sudhanshu Panda, a Geographic Information Systems (GIS) and environmental science professor at UNG. It creates an environment rich in nitrogen, which leads to algae production.

“When there is a lot of algae in the water, it stops the sunlight from passing through the water,” he said, adding it slightly decreases the oxygen in the water. “And when the algae starts to decompose, it robs the water of more oxygen. With a lack of oxygen, aquatic animals’ survival becomes difficult.”

To find the places that contribute to soil erosion, IESA’s faculty and students use their geospatial models to pinpoint “hot spots” of vulnerability. They then go into the field to confirm them.

UNG student Alaina Bailey takes a water sample at Buford Dam.

Kayla Ballenger, a 2016 UNG graduate who is now a graduate student at the University of Georgia, is the GIS expert using technology to collect the data for the project and will eventually venture into the field to “ground-truth” the data.

“I’m really looking forward to getting out in the field,” she said. “I’m hoping to carry what we are doing into my master’s thesis.”

But the project is more than that to Ballenger, who grew up in Eastanollee, Georgia. The self-described tom-boy grew up playing in creeks during camping trips in north Georgia with her family. Therefore, she wants to protect and preserve those same waterways for future generations.

“I want to take what we are doing to help other communities to stop soil erosion and protect the water quality,” she said.

Ballenger is doing her part with the project by developing the soil erosion vulnerability map with Panda and others. Once it is complete, Ellis and his team can deploy a simple and inexpensive solution to soil erosion: mulch.

Ellis and DIsser analyze their samples in the lab.

“That material is one of the best and cheapest materials to restore bare clay soil and reduce soil erosion,” Ellis said. “If you can place it on top of bare land, it can do amazing things.”


UNG student Arianna Disser collects water samples from the Chestatee River.
The mulch allows rainwater to soak into the ground instead of running across the soil and into waterways. Mulch then decomposes and releases nutrients into the soil. As soil organisms and plants take root, the land is restored.“If you can strategically place the mulch where the most sediment is leaving the landscape, then over a period of decades you can restore all of your most degraded land,” Ellis said.

Panda said the added bonus is mulch is free in most counties. Ellis said Lumpkin County stockpiles mulch at its recycling facility on Red Oaks Flat. Dahlonega supplies free mulch and leaf compost (when available) at its City Shop. In Hall County, free mulch is available at its landfill in Gainesville.

“Anytime there is a storm, the county goes out and cuts down trees and branches and makes wood chips,” Panda said. “And then they just leave it out for residents or transport it to dumping locations for county residents to take if needed.”

The goal is to direct mulch to where it can do the most good, eliminating erosion and restoring ecosystems, Ellis said. He added UNG is using mulch as the cornerstone of its Chestatee Restoration Project, which is another example of a true collaboration of the stakeholders of the watershed.

With this collaborative effort and data, UNG can share the information with government entities and land owners and show them how to improve the water quality and restore the lake.

“They have the desire to keep those rivers clean,” Ellis said. “And we can help a lot of people with this information by educating them.”

“I want to take what we are doing to help other communities to stop soil erosion and protect the water quality.” – Kayla Ballenger