Aussies Have Innovative Approach to Water Storage (Posted By Gary Cutrer)
An Australian company that specializes in water systems has an innovative approach to water storage. Instead of setting above ground tanks and directing runoff to them, the company digs a wide, shallow hole, lines it with a membrane and then fills the void with interlocking plastic cubes with plenty of ‘empty space’ for water to occupy. Another membrane is used to cover the water ‘sponge’ and then some of the dirt that was excavated is used to level the storage area out, back to the original grade.
Here’s a video of that construction process from start to finish.
From the company’s website:
Modular systems are manufactured from 100% recycled plastics which have been designed with a unique interlocking capability, this allows Sub terra to design a tank to any size, shape and specifications your site calls for. Around trees, under sports fields, beneath major roads or as a complete watering system for parks and gardens.
Modular underground water storage tanks are fast and simple to install. The modular, inter-connecting style allows most of the tailoring and assembly to be done off-site. Once delivered, the erection is simple and the free-form structure can be as shallow as 0.1m and as deep as 2.5m, with any length and width in 1m increments.
The company suggests that parks, sports fields and similar open areas that really don’t bear any load from above, i.e. buildings, are ideal candidates for this type of storage system. I would imagine that, considering some type of plastic is used for the underlying and covering membranes, this system would have a definite lifespan and tend to deteriorate after that. Still, it’s an interesting concept and one that stimulates the thinking organ. (That would be the brain in most people.)