HomeNSW’s deadly one-in-100-years floods could have been slashed by two metres using dams, CSIRO finds – The Guardian NSW’s deadly one-in-100-years floods could have been slashed by two metres using dams, CSIRO finds – The GuardianAustralia NSW’s deadly one-in-100-years floods could have been slashed by two metres using dams, CSIRO finds The Guardian CSIRO tests show even 10 ‘detention’ basins cannot ‘flood-proof’ city Australian Broadcasting Corporation