Introduction to the flood risk management cycle Stephanie

About Deltares is an independent institute for applied research in the field of water

Why a flood risk management cycle? ECCA 18 January 2022 3

Flood risk management cycle System understanding and issue identification Monitoring and evaluation FRM cycle

System understanding and issue identification Strategy building design, assessment, decision-making Implementation Monitoring and evaluation

System understanding and problem identification From shared system understanding to issue identification … this

Strategy building, design, assessment, and decision-making Ecology Use, integrate and conserve and restore present

Construction and implementation • Construction and management of NBFD measures may require large-scale engineering

Monitoring and evaluation Maintenance of nature-based solutions should be adaptive and involve learning with

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Introduction to the flood risk management cycle Stephanie IJff Stephanie. IJff@deltares. nl

About Deltares is an independent institute for applied research in the field of water and subsurface with five areas of expertise: ECCA 18 January 2022 2

Why a flood risk management cycle? ECCA 18 January 2022 3

Flood risk management cycle System understanding and issue identification Monitoring and evaluation FRM cycle Strategy building: design, assessment, decision-making Implementation ECCA 18 January 2022 4

System understanding and issue identification Strategy building design, assessment, decision-making Implementation Monitoring and evaluation Socioeconomic context Institutional system Physical system ECCA 18 January 2022 5

System understanding and problem identification From shared system understanding to issue identification … this requires multi-stakeholder involvement System understanding • Socio-economic context • Physical system (morphology + ecology) • Institutional system Issue assessment, what is the risk? • Hazard identification • Vulnerability and exposure assessment • Assessment of climate change impacts Institutional Physical system ECCA 18 January 2022 6 Socioeconomic context

Strategy building, design, assessment, and decision-making Ecology Use, integrate and conserve and restore present ecosystems, do not introduce new species where they do not belong … failed mangrove planting. Beware of the use of local species, right hydrodynamic conditions and local use of mangroves Socioeconomic context ECCA Design decision-making and financing framework during construction and maintenance phase, supported by (local) stakeholders 18 January 2022 7

Construction and implementation • Construction and management of NBFD measures may require large-scale engineering efforts • Closely monitor ecosystem functioning and impact during implementation … permeable dam construction Sand nourishments… ECCA 18 January 2022 8

Monitoring and evaluation Maintenance of nature-based solutions should be adaptive and involve learning with stakeholders and experts Adaptive co-management cycle … and take measures. Monitoring… … decisionmaking… ECCA … learning … 18 January 2022 9

Thank you