Useful suggestions Patrick, thanks for sharing the resources. We are working on a similar request for a small tropical island where potable water resources are diminishing due to partial urbanisation and tourist activities, the local community has practiced eco friendly practices so far, however with an airport and a small industry coming nearby, the runoff volumes shall become substantial and availability of water for increased population, mostly used to wasteful consumption patterns will pose a potential water crisis. The green drain solution is a combination of underdrained bioswale and retention tanks build with FRANKISCHE Rigofill-ST geocellular blocks. To resolve the problem of mosquitoes and brackish water collections, the soil cover above the blocks is maintained in a manner that the macrophytic activity in the gravel/sand layers has been substantially augmented by the rootzone. The layering as to be carefully calibrated according to the flow rates so that there is no ponding on the surface and the local flora is allowed to have a well drained soil. We chose Rigofill-ST blocks as these offer greatest strength and void ratio, expected life is well over 50 years, easy to install and inspect afterwards. Frankische has given us adequate design support, the first few installations in India are showing encouraging results. Please note that the grey water in these underground trenches will need to be recirculated and is not deemed to be potable, secondary treatment is recommended as per local site conditions Please see: https://www.linkedin.com/feed/update/urn:li:activity:6295049976691159040 Please feel free to ask for concept drawings, we shall be pleased to hear expert comments. Pawan Kakkar Jugapro.com

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Useful suggestions Patrick, thanks for sharing the resources. We are working on a similar request for a small tropical island where potable water resources are diminishing due to partial urbanisation and tourist activities, the local community has practiced eco friendly practices so far, however with an airport and a small industry coming nearby, the runoff volumes shall become substantial and availability of water for increased population, mostly used to wasteful consumption patterns will pose a potential water crisis.

The green drain solution is a combination of underdrained bioswale and retention tanks build with FRANKISCHE Rigofill-ST geocellular blocks. To resolve the problem of mosquitoes and brackish water collections, the soil cover above the blocks is maintained in a manner that the macrophytic activity in the gravel/sand layers has been substantially augmented by the rootzone. The layering as to be carefully calibrated according to the flow rates so that there is no ponding on the surface and the local flora is allowed to have a well drained soil.

We chose Rigofill-ST blocks as these offer greatest strength and void ratio, expected life is well over 50 years, easy to install and inspect afterwards. Frankische has given us adequate design support, the first few installations in India are showing encouraging results.

Please note that the grey water in these underground trenches will need to be recirculated and is not deemed to be potable, secondary treatment is recommended as per local site conditions

Please see:

https://www.linkedin.com/feed/update/urn:li:activity:6295049976691159040

Please feel free to ask for concept drawings, we shall be pleased to hear expert comments.

Pawan Kakkar

Jugapro.com