Environmental concerns around energy production are as high as they’ve ever been, and geosynthetic liners play a vital role in protecting the environment and meeting regulations. DGI provides high quality liner systems suitable for any energy application, including:
- Frac Pond Liners
- Frac Pond Covers
- Coal Ash Lagoons
- Produced Water Pits
Project Analysis — Floating Evaporation Covers
The ever increasing concern for fresh water rights and usage in the Petroleum-rich but Freshwater-Poor expanses of the Permian Basin in Western Texas and South Eastern New Mexico brought to light an important need for fresh water conservation. Horizontal fracking had brought water usage in the region to an all time high. Creating new ways to conserve water became increasingly important as those with access to water began to charge more for its usage.
Discussions with a DGI client noted through their own research and monitoring that a combination of factors were contributing to evaporation on a scale not seen in other regions. Low humidity, high winds, and high temperatures in combination with shallow 4 to 6 acre surface area ponds were all contributing factors. DGI suggested evaporation covers as a way to curtail this problem. Installing a new cover at the time of primary liner installation was an easy fix for this problem and was done with phenomenal success. Water loss in newly constructed ponds with new liners and covers was 99 percent less than a pond with no cover. This resulted in a tremendous reduction in freshwater costs for our client.
The client asked DGI to develop a method to cover existing ponds which already contained water. The DGI team engineered a system to complete the task. By incorporating a geomembrane with flexible characteristics DGI was able to build the entire cover on top of the existing pond walls and then using our own system pull/float the cover across the pond and anchor it using a standard anchor trench. The cover system is designed and built for each pond specifically to allow the cover to maintain intimate contact with the water and thus allowing it to rise and fall with the water level. Intimate contact was achieved by using a system of weights and floats which are installed after the cover has been pulled across the pond. DGI then designed a transfer line system which allows water to be pumped in or out of the the pond as needed. Any rainwater which falls on the cover is directed to a weighted area so it can be pumped back under the cover and into the pond itself ensuring no water goes to waste. After the success of a 3 pond pilot program the client elected to install over 30 evaporation covers on existing ponds and has implemented this system into use in all arid regions in which it operates.