Hi Andrew, Have you heard of anyone reverse engineering Afflux design for bridges and causeways to slow and temporally retard the flood? The science behind flooding points to two areas of relevance friction vs slope and infiltration.
In regards to friction several options may be available, mass plantings of trees which may or may not be high coppiced for longevity vs shade
Each road structure offers opportunity for retardation and slowing the flow, causeways could have concrete barricades and the causeway concrete can control the erosional fall of water.
Small bridges can be caged with the intention for a leaky weir structure up to a certain height
Large freeways can be double tiered where one is lower than the other to intentionally cause an obstruction and the upper can be dual way while in flood.
With redevelopment these can be raised and levees added to retard the flood over much larger areas upstream especially where interlocking spurs allow for a natural choke point. All this allows for longer response times and damage minimization
.
On the flat lands in the Australian outback on method of infiltration that is being trialed on the vast flat flood plains of the interior is the spreader levee, where water is retarded in the creek by either siltation mesh on a braced fence, or physical barrier of debris then a levee is used once the creek is breached to spread the flood over as wide an area as slope allows for it to soak in. They are currently trialing projects in the order of 250 000 acres or more to great success. These control floods but most importantly control erosion and allow for these intermittent hard flood events to rehydrate vast areas of semi arid land.
Sorry I missed this valuable piece on land-use policy and risk reduction before posting on related issues on Sustain What. Just added a link here! https://revkin.substack.com/p/closing-the-deadly-last-mile-gap
Hi Andrew, Have you heard of anyone reverse engineering Afflux design for bridges and causeways to slow and temporally retard the flood? The science behind flooding points to two areas of relevance friction vs slope and infiltration.
In regards to friction several options may be available, mass plantings of trees which may or may not be high coppiced for longevity vs shade
Each road structure offers opportunity for retardation and slowing the flow, causeways could have concrete barricades and the causeway concrete can control the erosional fall of water.
Small bridges can be caged with the intention for a leaky weir structure up to a certain height
Large freeways can be double tiered where one is lower than the other to intentionally cause an obstruction and the upper can be dual way while in flood.
With redevelopment these can be raised and levees added to retard the flood over much larger areas upstream especially where interlocking spurs allow for a natural choke point. All this allows for longer response times and damage minimization
.
On the flat lands in the Australian outback on method of infiltration that is being trialed on the vast flat flood plains of the interior is the spreader levee, where water is retarded in the creek by either siltation mesh on a braced fence, or physical barrier of debris then a levee is used once the creek is breached to spread the flood over as wide an area as slope allows for it to soak in. They are currently trialing projects in the order of 250 000 acres or more to great success. These control floods but most importantly control erosion and allow for these intermittent hard flood events to rehydrate vast areas of semi arid land.