Question 4 a) "SuDS are designed to mirnic the natural rnovement of water and slow down...

Question 4 a) "SuDS are designed to mirnic the natural rnovement of water and slow down the process of the water getting into the watercourse. They can channel the flow of water above ground and reduce the burden on the piped sewerage system- The Pitt Review 2007. This extraction from the Pitt Review surnmarised the application of Sustainable Drainage Systerns of which there are rnany designs. Briefly explain each of the different types of SuDS noted below. i. Green Roofs ii. Balancing Ponds iii. Infiltration trenches iv. Swales v. Permeable pavements (10) b) The floods for a particular river conform to an Extreme Value Type I (i.e. Gumbel) distribution. If the 100-year flood has a magnitude of 260 ri,/s and the 10-year flood has a rnagnitude of 170 rnsVs. what is the probability of having a flood as great as or greater than 240 rn-, and what is the return period of that event. c) Give 3 examples of Human flood causes (12) (3)

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Ally Wells answered 11 months ago

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