The UNH Stormwater Center 2005 Report
The 2006 Report will also be available after January 2008. The Stormwater Center studies stormwater-related water quality and quantity issues. UNH designed, constructed, and runs a facility that provides the controlled testing of stormwater management designs and devices. One unique feature is the field facility for research to evaluate and verify the performance of stormwater management devices and technologies. Fifteen different management systems are currently undergoing side-by-side comparison testing under strictly controlled conditions. This on-campus evaluation facility enables the Center to offer technology demonstrations and workshops, and also specialized training opportunities.
The Economics of Low-Impact Development:
A Literature Review - November 2007

The Economics of Low-Impact Development: A Literature Review" is a nice overview which you can download at the ECONorthwest website. Includes analysis of studies on cost savings of reducing floodplain impacts (flooding).
 
This website is funded in part by the Florida Department of Environmental Protection, the National Oceanic and Atmospheric Administration, pursuant the Florida Coastal Management Program Grant CZ628. The Views expressed herein are those of the authors and do not necessarily reflect the views of the State of Florida, NOAA or any of its sub-agencies.