New Jersey’s stormwater rule and Best Management Practices Manual require that stormwater management standards be met by incorporating nonstructural stormwater management strategies to the “maximum extent practicable” (NJAC 7:8). Nonstructural strategies are low impact site design techniques that preserve or mimic natural hydrologic function; examples include designing paved areas that are “disconnected” to allow stormwater to flow over natural surfaces and soak into the ground. There are nine nonstructural strategies listed in the NJ DEP’s stormwater rule.
Some structural stormwater management measures—including most of the green infrastructure practices described in this Guide—can be used to support or satisfy nonstructural strategies requirement. In the pages that follow, for the GI practices that help to satisfy the nonstructural strategies requirement, you will see a check mark icon with a reference to the nonstructural strategy number(s), like this:
The nine nonstructural stormwater management strategies are as follows:
Some green infrastructure can also assist in meeting NJDEP regulatory requirements for the reduction of Total Suspended Solids (TSS) in stormwater, with a target reduction of 80% overall. In the following pages, the assumed TSS reduction capacity assigned to each green infrastructure practice by the NJ BMP Manual is denoted using an icon: