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Related Experiment Video

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Watershed Planning within a Quantitative Scenario Analysis Framework
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Modeling low impact development potential with hydrological response units.

Marija Eric1, Celia Fan1, Darko Joksimovic1

  • 1Ryerson University, 350 Victoria Street, Toronto, Ontario, M5B 2K3, Canada

Water Science and Technology : a Journal of the International Association on Water Pollution Research
|December 17, 2013
PubMed
Summary

This study introduces a lot-level approach to evaluate low impact development (LID) benefits for stormwater management. Performance curves based on lot properties estimate the potential of large-scale LID implementation for reducing runoff and phosphorus loading.

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Area of Science:

  • Environmental Engineering
  • Urban Hydrology
  • Water Resource Management

Background:

  • Assessing low impact development (LID) benefits at the watershed scale is challenging due to model size limitations.
  • Existing watershed models struggle to represent LID techniques effectively at smaller scales.

Purpose of the Study:

  • To develop and apply a lot-level methodology for evaluating the benefits of implementing low impact development (LID) stormwater management techniques.
  • To create performance curves relating lot properties to runoff volume and phosphorus loading changes with LID implementation.

Main Methods:

  • Utilized the concept of urban hydrological response units (HRUs).
  • Modeled representative lots using the USEPA Stormwater Management Model over a typical rainfall year.
  • Developed performance functions linking lot properties to LID benefits using GIS data.

Main Results:

  • Generated performance curves estimating the potential benefits of large-scale LID implementation based on lot characteristics.
  • Quantified changes in annual runoff volume and phosphorus loading for various LID techniques.
  • Identified potential locations, benefits, and costs for LID implementation across urban areas.

Conclusions:

  • The lot-level approach provides a scalable method for assessing LID benefits in stormwater management.
  • Performance curves effectively link lot properties to hydrological impacts, guiding municipal decisions.
  • This methodology supports strategic planning for widespread LID adoption to improve water quality.