Pro-active flood risk managment using a transdisciplinary multi-method-approach

Abstract

Water related extreme events are causing most of the disasters worldwide. Between 2001 and 2018 around 74% disasters were water-related and during the past 20 years, the total number of deaths caused only by floods and droughts exceeded 166,000, while floods and droughts affected over three billion people, and caused total economic damage of almost US$700 billion (EM-DAT, 2019). The number of events with water related extremes are expected to increase due to climatic and land use changes.Thus, it is of utmost importance to identify ways to reduce water related risks. Potential hazards, exposure and vulnerability have to be identified, published and communicated. This is done for example in the European Union in a coordinated way, based on the European Flood Risk Management Directive. However, identifying risk only is not leading to actual actions and is not  sufficient to reduce risks. This became again obvious in 2021 when extreme floods caused more than 180 deaths in Germany and caused around 46 billion Euro damage. This and other events are revealing the need for closing the gap between theory and practise to establish proactive and preventive strategies and implementation of measures.Ghana is one of the countries most prone to floods in West Africa. Its annual occurrence often leads to disasters that are mostly felt by the urban poor. Despite the existence of salient activities conducted in order to reduce the flood risk in Ghana, there are still persisting challenges (Almoradie et al. 2020).In order to overcome the implementation gap from science to practice a participatory and transdisciplinary mixed-method approach for Ghana is pursuied. Transdisciplinary research integrates knowledge from various scientific disciplines and non-academic actors.In this way, results can be developed for challenges that are of use to society and science.In the long term, transdisciplinary research strengthens knowledge about the human-water/flood system, the desired state of this system and the way to achieve this state by transformative adaptation.A participatory mixed-method approach comprising hydrological and hydrodynamic modelling, participatory mapping, questionnaires, workshops, focus group discussion, system dynamic modelling and the analysis of vulnerability including failure of critical infrastrcuture were employed (Evers et al. 2021) for three case study areas in Ghana. The dynamics of human-flood-interaction are identified together with practioneers and adaptation measures were identified in a participatory way. By this approach we are aiming to make our research actionable and to design and implement knowledge translation mechanisms. Almoradie, A.*, de Brito, M.M.*Evers, M., Bossa, A., Lumor, M., Norman, C., Yacouba, Y., Hounkpe, J. (2020) Current flood risk management practices in Ghana: gaps and opportunities for improving resilience. International Journal of Flood Risk Management, doi:10.1111/jfr3.12664.Evers, M., Almoradie, A., de Brito, M. M., Höllermann, B., Ntajal, J., Lumor, M., Bossa, A., Norman, C., Yira Yacouba, Y. Y.,J. H. Jean Hounkpe (2021): Flood risk management in Ghana: gaps, opportunities, and socio-technical tools for improving resilience, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-12683, doi:/10.5194/egusphere-egu21-12683