Revision as of 19:07, 1 September 2017

Welcome to the Low Impact Development Stormwater Management Practice Planning and Design Guide

This is a new kind of guideline document, which is intended to improve your experience:
Recommendations have been pared down into tight, actionable articles. Expect to find a lot of data rich tables, lists and tools, rather than paragraphs of background material.

The wiki format invites you to comment at the bottom of every page. If you believe the content to be incorrect or out of date, please let us know using ‘Help improve this page’ and we’ll make a rapid response. Minor changes will be made as soon as possible, significant changes may be delayed pending review by a panel of STEP members. Note that the comments you leave will appear in the ‘VIEW FEEDBACK’ link on the left.

When you need to reference an article to support your decisions and designs, don’t forget to include the date and time at which you took the advice. Don’t worry if the content has changed since you used it, the website maintains a detailed history of the time and every content change made, see ‘VIEW HISTORY’ at the top.
This is a relatively young, living document; conceived in 2017. You will find that we’re missing information, but we are growing quickly. An important part of this process is to know what you need, so please submit your feedback! Finally, if you are a subject matter expert and wish to contribute a new article, we would love to hear from you. lid.guide

The Low Impact Development Stormwater Management Planning and Design Guide (LID SWM Guide) is currently being developed by Credit Valley Conservation (CVC), Grand River Conservation Authority (GRCA), Lake Simcoe Region Conservation Authority (LSRCA), and Toronto and Region Conservation Authority (TRCA) as a tool to help developers, consultants, municipalities and landowners understand and implement more sustainable stormwater management planning and design practices in their watersheds. Many jurisdictions have defined the term low impact development. For this document, the following definition, adapted from the United States Environmental Protection Agency (U.S. EPA, 2007) will be used:

Low impact development (LID) is a stormwater management strategy that seeks to mitigate the impacts of increased runoff and stormwater pollution by managing runoff as close to its source as possible. LID comprises a set of site design strategies that minimize runoff and distributed, small scale structural practices that mimic natural or predevelopment hydrology through the processes of infiltration, evapotranspiration, harvesting, filtration and detention of stormwater. These practices can effectively remove nutrients, pathogens and metals from runoff, and they reduce the volume and intensity of stormwater flows.

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 <h1><center>Welcome to the Low Impact Development Stormwater Management Practice Planning and Design Guide<br>
-<h3 style = color: red">This is a new kind of guideline document, which is intended to improve your experience:
+<h3 style = color:red">This is a new kind of guideline document, which is intended to improve your experience:
 *Recommendations have been pared down into tight, actionable articles. Expect to find a lot of data rich tables, lists and tools, rather than paragraphs of background material.
 *The wiki format invites you to comment at the bottom of every page. If you believe the content to be incorrect or out of date, please let us know using ‘Help improve this page’ and we’ll make a rapid response. Minor changes will be made as soon as possible, significant changes may be delayed pending review by a panel of STEP members. Note that the comments you leave will appear in the ‘VIEW FEEDBACK’ link on the left.