Low Impact Development & Storm-EZ
Low Impact Development (LID) is a voluntary approach to stormwater management that can benefit both the economy and the environment by reducing infrastructure costs, increasing lot yields and enhancing water quality protection.
The Definition of LID
A development is considered LID when the volume of runoff leaving the site after development matches the volume of runoff before development. In addition, and LID project should maintain adequate flows to the streams and weltands on the site rather than piping stormwater to a single low point.
What is Storm-EZ?
Storm-EZ is a spreadsheet based on the NRCS Discrete Curve Number Method and current research on stormwater control measures. Designers enter data about the site plan and the stormwater control measures that will be used. Then, Storm-EZ reports how closely the project matches the pre-development runoff volumes. Storm-EZ can also be used to judge compliance with the "basic treatment" approach (85% TSS removal) or a hybrid approach of some LID practices used in conjunction with basic treatment.
The use of Storm-EZ is voluntary. Designers may continue to use the old application and supplement forms. However there are a number of advantages to using Storm-EZ, including: