THE PROBLEM:
When designing and building a water ponds, it is advisable to analyse the presence of biogas in the subsoil (decomposition of organic material). The perfect impermeability of HDPE geomembranes is an impenetrable barrier to the gas on its route upwards. It accumulates below the geomembrane and exercises continuouspressure on the plastic. Pockets of biogas form, breaking the membrane and destabilizing the water ponds.
THE SOLUTION:
INTERDRAIN fitted bellow the geomembrane is the solution.
1. It intercepts the ascent of gas.
2. It quickly conducts it to the grooved drain pipes (which direct it away from the area occupied by the basin)
3. It eliminates the pressure due to trapped gas.
4. It prevents the formation of dangerous pockets of biogas.