Fourth Tray - Evaluate the options and their costs / benefits

What can be done to reduce the risk?

The fourth stage of the evaluation is identifying adaptation options to reduce the risk from climate change. Adaptation can be engineering or policy based and should involve no- or low-regrets options that can be changed over time. The tools in this tray are:

Tool 4.1: Climate change adaptation - key concepts

(PDF 157 KB)

  • Provides some climate change adaptation key concepts based on a literature review of primarily urban-based climate change studies and identifies the many issues associated with preparing for and adapting to present-day and future weather and climate hazards in urban settings. 

Tool 4.2: Overview of an option screening tool

(PDF 1.5 MB)

  • This tool is designed to be used in a brainstorming context: the tool provides a means of exploring a wide range of generic options and short-listing the most promising for the local context. 

Tool 4.3: Rapid cost/benefit evaluation of impacts and adaptation options

(PDF 1.2 MB)

  • Demonstrates the classical Cost Effectiveness process embodied within a subjective order of magnitude approach to quantifying the costs and benefits of alternative adaptation scenarios. 

Tool 4.4: Individual house flood mitigation measures - benefit/cost tool

(PDF 750 KB)

  • This Tool is to aid in the screening and short-listing of flood damage reduction measures for existing housing at the small scale level. The Tool is equally applicable to current flood scenarios as well as to future climate change effects on flooding scenarios. 

Tool 4.5: Overview of a multi-criteria analysis based decision tool

(PDF 1.6 MB)

  • This MCA-based tool is specifically designed to allow prioitisation of actions to prevent or mitigate the impact of landslides based on the level of risk they present, taking account of climate change.  

Tool 4.6: Overview of a Top down decision tool

(PDF 963 KB)

  • This is a tool to assist decision-making in a "real-world" context, where statutory and policy provisions must be included along with other considerations. 

Tool 4.7: Adaptation by design: impact of climate and land use change on the sizing of stormwater management devices

(PDF 730 KB)

  • This is a tool to help design the size of stormwater retention devices based on scenarios of future heavy rainfall events. 

Tool 4.8: Overview of a building flood protection decision framework

(PDF 982 KB)

  • This tool provides a linked set of tools for adaption of individual buildings that are prone to enhanced flood risk due to climate change.  

Tool 4.9: Linkages to hazard and risk assessment tools 

(PDF 344 KB)

  • This tool provides some quick links between the decision tools in this tray and the hazard and risk assessment tools in trays 2 and 3.
Illustrative comparison of schemes based on Benefit-Cost Ratio [from Tool 4.3].