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The mid-Wales line is flooded - again! If @tfwrail struck agreements with farmers high in the catchment to invest in #NaturalFloodManagement, they could prevent it, at a fraction of the cost.
But all the flood control is at the bottom of the catchment - a recipe for failure.
But all the flood control is at the bottom of the catchment - a recipe for failure.
When the hills are bare, the rivers straightened and largely treeless, water rushes down to the lowlands unimpeded, causing flood peaks that drown the railway line. Hard engineering at the bottom of the catchment is overwhelmed.
Look at the whole system, not just the floodplains
Look at the whole system, not just the floodplains
The trick is to hold back the rainwater in the hills for as long as possible, de-synching the tributaries and attenuating the flood peaks. It has been shown to work again and again. But the hard-engineering mindset prevails.
Other examples here: theguardian.com/commentisfree/…
Other examples here: theguardian.com/commentisfree/…
