Building Blue in Franklin, Massachusetts
Julie Wood,a* Nigel Pickering,b and Kate Bowditchc
a Senior Scientist, Charles River Watershed Association, Weston, MA, jwood@crwa.org
b Senior Engineer/Scientist, Horsley Witten Group, Sandwich, MA
c Director of Projects, Charles River Watershed Association, Weston, MA
* Corresponding author.
Abstract
This study compared two methods of developing subwatershed-scale stormwater management plans to bring a small subwatershed into compliance with a nutrient total maximum daily load (TMDL) study using low-impact development (LID) stormwater treatment systems. We developed one plan using a step-wise professional judgment method and the second using an optimization algorithm set to maximize phosphorus reduction while minimizing cost. The resulting management plans offer insight into the benefits of subwatershed-scale stormwater planning efforts, and specifically the benefits of mathematical optimization in stormwater management planning. Finally, the study presents multiple accessible options for compliance with a nutrient TMDL using LID systems sited and designed to provide a host of additional public benefits, such as reduced flooding, increased groundwater recharge, decreased stress on drinking and surface water resources, and the addition of public green space.
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