Skip to main content

Evaluation of Runoff Volume Nondegradation Standard

Buy Article:

$17.50 plus tax (Refund Policy)

Or sign up for a free trial


The Vermillion River Watershed Joint Powers Organization (VRWJPO) recently implemented standards for new development and redevelopment intended to prevent degradation of stream physical, chemical and biological integrity. The new VRWJPO standards incorporated development design criteria for volume and temperature control to supplement existing peak runoff rate controls for protecting trout stream resources in the watershed, which is located in the outskirts of the Minneapolis-St. Paul, Minnesota metropolitan area. Developers are required to apply the combination of these criteria to the stormwater management practice design to ensure that each site meets the peak runoff rate requirements for the one-, two- and 100-year return period design events and that the runoff volume and temperature control standards are met for the two-year design event. Since most of the watershed is currently agricultural, with some woodland, grassland and existing urban development, there was a concern that the design criteria may not provide adequate protection of the water resources on a long-term basis given the added runoff volume, associated with additional imperviousness, during larger storm events and runoff events resulting from back-to-back storms or snowmelt runoff. As a result, this project was developed to evaluate the various undeveloped and developed design scenarios, both with and without the volume and peak runoff rate control requirements, based on continuous simulations of the hydrologic/hydraulic conditions in the XP-SWMM model. The development scenarios included typical low-density residential and high-density commercial sites. The XP-SWMM modeling also included design event simulations of each development scenario that were used to design the hypothetical management practices and used as input for a thermal model completed under a separate project (not described here). This project also developed costs estimates for the stormwater management infrastructure associated with each development scenario. The results of the continuous and event based simulations indicated that the VRWJPO runoff control standards will significantly improve upon the flow frequency and flow duration characteristics predicted for agricultural land uses, ensuring adequate protection of the predevelopment flow conditions and offsetting some of the volume impacts of past watershed development. Normalizing the cost of controlling peak flows by dividing the incremental cost estimates by the peak runoff rate modeling results for the two-year design event also indicates that the volume control portion of the standards provides a significantly more cost-effective means for reducing the peak flows for each development site. In addition, the volume control standard is the only means for reducing runoff volumes, which will reduce the additive erosive effects of flow as the spatial scale expands from individual development sites to the overall watershed.

Keywords: BMP cost-effectiveness; Nondegradation; design criteria; development standards; hydrologic and hydraulic modeling; runoff rate requirements; runoff volume control

Document Type: Research Article


Publication date: 2009-01-01

More about this publication?
  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

    A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • Learn about the many other WEF member benefits and join today
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more