An Exlterra invention to solve standing water and groundwater problems
GEPS stands as a groundbreaking innovation, addressing stormwater issues at their core rather than merely alleviating symptoms.
Unlike conventional drainage systems that redirect water through pipes, GEPS ingeniously restores equilibrium to the ground by emulating the natural functionality of underground tree roots.
With moisture dynamically rebalanced below the surface, the ground achieves newfound stability—never excessively saturated nor overly dry.
The harmonized conditions facilitated by GEPS underground unlock a myriad of possibilities and applications. Operating in harmony with precipitation and seasonal variations, the GEPS system seamlessly integrates with the natural hydrological cycle.
The heightened water infiltration rate enhances surface conditions for sports fields, airports, infrastructure, parks and gardens, retention ponds, and real estate developments.
Simultaneously, moisture capture benefits infrastructure, foundations, sports fields, parks, gardens, and airports.
GEPS has pioneered a new frontier in stormwater management, setting the standard not only for technical excellence but also for sustainability.
GEPS maximizes natural water infiltration instead of moving water into stormwater/sewer systems.
GEPS balances moisture in the ground allowing for more consistent, firmer soil, and allows for recharging of groundwater.
GEPS works without energy input and is maintenance free. A unique sustainable long-term solution that operates in synergy with its environment.
Gardens, Foundations, Parks, Pool
Enhances the quality of your soil, accelerates water infiltration, protects foundations and prevent floods in basements.
Property Development, Sport Field: Football, Golf, Rugby, etc.
Reduce operation and maintenance costs while increasing playtime, eliminates excess water in property development.
Airports, Parks, Roads, Infrastructures
Helps mitigate bird strikes at airports, extends the lifetime of infrastructures and reduce operating cost.
GEPS is quickly installed without disturbing the soil, using HAZL or MAZL, two ultra-light drilling rigs specially designed and developed by Exlterra to install our various technologies.
GEPS is used in a growing number of countries with spectacular results.
Azabu High School in Tokyo has suffered from standing water problems after rain. Historically this would end with the playground being oversaturated with water pooling on the surface.
“We had heavy rain before the gymnastics festival on October 5. Although the GEPS installed area was the site of the bleachers, the ground was totally dry. We also noticed a strong effect after typhoon Nr.19 passed through the Kanto region on October 12: without GEPS, the ground would have been very saturated, but it was not”. Hideaki Taira, Headmaster
“The installation is done outside of the house. Exlterra neither has to intervene inside our house, nor work on the foundations. Work lasted one week. Exlterra’s employees did a professional job and the installation left no mark in our garden.
Six months later we can confirm that the GEPS system works. We were able to stop the temporary pumps that have been removed since then. Despite heavy rainfall in the spring, we have had no more moisture problems in our house. We recommend with great pleasure Exlterra, its GEPS system and professional staff.” — MS, Owner
Fairway 15 on the prestigious golf course in Gland, Switzerland would see standing water upwards to 7m in diameter. After a rainfall, this water would take up to 24 hours to infiltrate and be a general hazard for the course. GEPS was installed, the fairway clears up hours more quickly and is ready for play.
“Since the GEPS was installed on Fairway 15, the fairway no longer has stagnant water issues. No traditional drainage system had allowed such a result. In addition, the soil now always has a good moisture level, even in dry periods”. Guillaume Sajus, Greenkeeper
“The GEPS technology might best be described as novel and is unique in my over 40 years of experience in water resource management, including wetland design and operation. The system cannot be readily compared with existing surface drainage approaches and technologies that depend on pipes or channels to deliver water to holding basins. The GEPS is passive but has great capacity for water movement taking advantage of many mechanisms and processes.”
“Most of the GEPS within the infiltration basin enhanced the local infiltration rate.
• The infiltration rates associated with two of the shallow GEPS were 7.4 – 8.6 times faster than the infiltration rate associated with native soil conditions.
• The infiltration rate associated with the deep GEPS was 10.2 times faster than the infiltration rate associated with native soil conditions.”
A few questions we're commonly asked
The GEPS system works by using fundamental physical properties of capillary action, water pressure, and soil moisture content in conjunction with how water interacts with soil to create a pathway for water molecules traveling through the soil.
Installation works are usually completed in a matter of days and, once the soil borings collapse around the GEPS units, the GEPS becomes increasingly acclimated and effective at managing soil moisture. This process can vary from 4 – 24 weeks depending on soil conditions, climate, and moisture conditions. Once it is acclimated, the system works indefinitely without any further intervention or maintenance.
Yes, GEPS uses fundamental physical properties of how water interacts with the soil to function, therefore GEPS is able to function in all types of soils. Its performance will vary depending on the soil type and condition and is particular striking in soils where natural drainage is originally poor.
GEPS are installed and buried vertically into the soil in, near, or around the problem area according to a designed plan, with minimal disruption to the topsoil.
No, installation of GEPS leaves only tiny dark spots on the soil which disappear in a few days. As the units are installed completely beneath the surface, they are invisible. In addition, contrary to traditional drainage, an GEPS leaves absolutely no marks on sports fields.
No, once installed, the GEPS will work indefinitely with no additional cost and require zero maintenance. Its unique design allows it to be a passive system and does not require external energy input.
The GEPS can be used in conjunction with other stormwater management solutions. It can enhance performance and reduce maintenance. The performance is unique to each site and to each stormwater management solution.
The cost of an GEPS depends on the problem to solve, the environment causing or aggravating that problem and the performance sought. As the system is not intrusive, its installation can accommodate the existing infrastructure, the total cost of an GEPS installation may be considerably more reasonable than a traditional drainage system while its performance is significantly higher.
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