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[+]   #20 at 2025-07-21 13:24:16

Rewilding a Concrete City Canal

Our mid‑century flood canal is a sterile trapezoid. Proposal: soften one bank, add gravel riffles, floating vegetated mats. Critics fear reduced conveyance during peak storms. Has anyone balanced flood control + habitat in a similar retrofit?

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[+]   #21 at 2025-07-21 13:24:21

Use compound cross‑sections: keep a low‑flow meandering thalweg inset inside the larger flood shelf. In big storms the whole trapezoid still engages; everyday flows interact with habitat features.

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[+]   #22 at 2025-07-21 13:24:26

Model debris accumulation explicitly. Early pilots failed not because of vegetation hydraulics, but because woody debris jammed bridge constrictions that engineers hadn’t stress‑tested.

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Rewilding a Concrete City Canal