A
system, methodology, and
programming logic for active
stormwater controls to optimize
sizing and design of Hydromodification Management (HM) structural Best
Management Practices (BMPs) to achieve optimal flow duration control.
Control logic enables the
controlled release of
stormwater from a BMP in a manner most akin to pre-development flow duration curves. Inputs to this logic include: flow duration curves based on continuous hydrologic
simulation for pre- and post-development conditions; real-time measurement of
water level within the BMP; and real-time measurement of
discharge entering the BMP. This
control logic can interact with
control logic for other
stormwater management objectives, such as harvest and reuse, infiltration, and combined sewer overflow prevention, and respective inputs, such as real-time weather forecast data,
precipitation gage data, downstream flow gauge data, and
water quality data, to meet those design objectives as well. New HM BMPs can be optimized to be smaller and, thus, more feasible to implement. Existing stormwater facilities designed for
flood control or other management objectives can be retrofitted to provide hydromodification control as well. When utilized with real-time flow and
water level monitoring equipment and data, the flow release logic can be adaptively adjusted without physical retrofit of the BMP's outlet.