Bin 2.1 Flooding

Will flooding become more frequent?

The Tools in Bin 2.1 demonstrate a process whereby the effects of climate change on heavy rainfall can be estimated and then used as input to hydrological models to assess changes in flood flows and then to hydraulic models to assess changes to flood inundation. 

Tool 2.1: Overview of flooding tools

(PDF 140 KB)

  • A brief overview of Tools 2.1.1 to 2.1.5 

Tool 2.1.1: General guidance on climate change and flood modelling methods used in New Zealand

(PDF 398 KB)

  • This tool summarises the MfE (2010) climate change and flooding guide on Flooding and Climate Change. 

Tool 2.1.2: Modelling future heavy rainfall

(PDF 790 KB)

  • This tool demonstrates methods for estimating future rainfall intensity and spatial variation taking into account the effects of climate change. 

Tool 2.1.3: Hydrological modelling of present-day and future floods

(PDF 503 KB)

  • This tool demonstrates how estimates of future heavy rainfall intensity with temporal and spatial variation can be used to estimate river flood flows. 

Tool 2.1.4: Inundation modelling of present-day and future floods

(PDF 1.1 MB)

  • The purpose of this tool is to show how estimates of river flood flows corresponding to future scenarios of heavy rainfall can be used to estimate the corresponding flood inundations. 

Tool 2.1.5: Linkages to risk assessment, adaptation options and decision tools 

(PDF 90 KB)

  • This tool identifies the next stages in an assessment of flooding impacts due to climate change.
Southland's Black Friday, The January 1984 Flood [Lind, C.A. (1984)].