Continuing increases in flood losses raise a variety of issues, and su
ggest numerous important research opportunities, from: (1) evidence of
persistently incorrect economic analysis of structural flood control;
(2) lack of understanding of how subsidies (for navigation, structura
l versus non-structural mitigation, and parts of agriculture) have def
eated or subverted hood policies; and (3) lack of understanding of the
distortions of urban form resulting from manipulation of hazard mitig
ation, induced development and inappropriate incentives for municipali
ties. Without adequate understanding of these topics, policy will fail
to reduce flood losses and improve location of investments, and hood
policy will continue to be effectively a legitimating rationale for ot
her purposes. But policy-supportive research in re-analysis, historica
l analysis, and empirical work awaits only recognition of its value. F
ailure to do the useful work, however, bodes ill for responses to glob
al change and other threats; the research proposed here would help est
ablish methods badly needed for human dimensions research.