Blue-Green Infrastructure (BGI) and Sustainable Drainage Systems (SuDS) are increasingly recognised as vital components of urban ﬂood risk management. However, uncertainty regarding their hydrologic performance and lack of conﬁdence concerning their public acceptability create concerns and challenges that limit their widespread adoption. This paper investigates barriers to implementation of BGI in Portland, Oregon, using the Relevant Dominant Uncertainty (RDU) approach. Two types of RDU are identiﬁed: scientiﬁc RDUs related to physical processes that affect infrastructure performance and service provision, and socio-political RDUs that reﬂect a lack of conﬁdence in socio-political structures and public preferences for BGI. We ﬁnd that socio-political RDUs currently exert the strongest negative inﬂuences on BGI decision making in Portland. We conclude that identiﬁcation and management of both biophysical and socio-political uncertainties are essential to broadening the implementation of BGI and sustainable urban ﬂood risk management solutions that are practical, scientiﬁcally sound, and supported by local stakeholders.
Areas of Focus: Climate Change
, Climate Science
Climate change is an urgent global challenge. EPIC research is helping to assess its impacts, quantify its costs, and identify an efficient set of policies to reduce emissions and adapt...
EPIC’s interdisciplinary team of researchers is contributing to a cross-cutting body of knowledge on the scientific causes of climate change and its social consequences.
Producing and using energy damages people’s health and the environment. EPIC research is quantifying the social costs of energy choices and uncovering policies that help protect health while facilitating growth.