Subsurface Gravel Wetland Design and Porous Pavement Design Workshops

  • Wednesday, March 14, 2012
  • Friday, March 16, 2012
  • Morristown, NJ; Piscataway, NJ; and Toms River, NJ

Don't Delay...Register Now!!!

Subsurface Gravel Wetland and Porous Pavement Design Workshops

In support of the New Jersey Environmental Infrastructure Financing Program (NJEIFP) Barnegat Bay Initiative

Presented by University of New Hampshire Stormwater Center

Sponsored by New Jersey Department of Environmental Protection, Rutgers Cooperative Extension, Barnegat Bay Partnership, Coastal Training Program at Jacques Cousteau National Estuarine Research Reserve

The workshop offers two parts: Subsurface Gravel Wetland Design (morning session) and Porous Pavement Design (afternoon session).  The learning objective for each is to understand the design components and performance expectations of each system.

Each workshop will review the recent innovations in Low Impact Development (LID) stormwater designs for two types of systems:  the Subsurface Gravel Wetland and Porous Pavements. Each workshop will provide stormwater management professionals with the up-to-date characteristics of successful designs. Attendees’ may enroll in sessions (full day) or one session (half-day) depending on interest (sign-up for one or both workshops) as well as availability (first come-first served basis). Participants will learn key design principles necessary to successfully design, evaluate, specify, and install a subsurface gravel wetland or porous pavement for stormwater management.

Upcoming Dates

3/14/2012  Frelinghuysen Arboretum, Morristown
3/15/2012  Livingston Student Life Center, Piscataway
3/16/2012  Ocean County College, Toms River

Morning Session:  Subsurface Gravel Wetland Design

The subsurface gravel wetland is a recent innovation in Low Impact Development (LID) stormwater design. It approximates the look and function of a natural wetland, effectively removing sediments and other pollutants commonly found in runoff, while enhancing the visual appeal of the landscape and adding buffers, or greenscape, to urban areas. The subsurface gravel wetland evaluated and recommended by the UNHSC is a horizontal-flow filtration system that should not be confused with stormwater wetlands that function more like ponds. Instead, it relies on a dense root mat, crushed stone reservoir, and an anaerobic, microbe-rich environment to improve water quality. Like other filtration systems, it demonstrates a tremendous capacity to reduce peak flow and improve water quality. The subsurface gravel wetland is unique in its ability to remove up to 95% of nitrogen during summer months and is recommended in some states for nutrient impaired waterbodies.

Afternoon Session: Porous Pavement Design

Pavements are some of the most prolific structures in the modern landscape. Traditional impervious paved surfaces have been inextricably linked to adverse impacts on water quality at the regional and watershed levels. Many technologies exist to mitigate these threats, including innovative paving alternatives.

Porous pavements are a rapidly expanding practice available for protecting urban watersheds and aquifers. Recent advancements in technical design specifications and improved material selection make porous pavement technologies a powerful tool for engineers and developers facing ever increasing treatment performance standards. Training and familiarity with porous pavements is a critical component to successful installations and long-term functionality. Participants will learn key design principles necessary to successfully design, evaluate, specify, and install porous pavement for stormwater management including QA/QC, construction phasing, and operations and maintenance.

Workshop Schedules

Subsurface Gravel Wetland

7:45 – 8:00          Registration – Welcome, Handouts and Workshop Materials

8:00 – 9:20          History, Water Quality Performance, Hydraulic Performance, Hydraulic Control

9:20 – 9:40          NJDEP Regulatory Criteria and Barnegat Bay Initiative

9:40 – 10:00        Break and Networking

10:00 - 11:30       Design Considerations, Siting, Design Specifications, and Construction Oversight.

11:30 – 12:00      Q&A


12:00 – 1:30        Lunch 

Porous Pavement

1:30-3:00              Introduction, Porous Pavement History, Acceptable Uses, and System Basics

3:00 – 3:15           Break

3:15-4:30              Siting Considerations, Design and Construction Considerations for Porous Pavements

4:30-5:00              Q&A


Dr. Robert Roseen, Dr. Tom Ballestero, and James Houle of the UNH Stormwater Center, and the New Jersey Department of Environmental Protection.

 Registration and Enrollment

Space is limited so register soon!

The registration fees vary and a detailed on each respective registration page. Registration is for single or both sessions.

Fee includes course materials and lunch.

For more information, please contact us:

James Houle
Program Manager & Outreach Coordinator, UNH Stormwater Center
Environmental Research Group
University of New Hampshire
Durham, NH 03824

603-862-1445 (tel)
603-862-3957 (fax)


Maddy Wasiewski
Program Support Assistant, UNH Stormwater Center
Environmental Research Group
University of New Hampshire
Durham, NH 03924-3534

603-862-2206 (tel)
603-862-3957 (fax)


For additional information and to register for this course please complete visit

Website Issues? Contact Us

New Jersey Association For Floodplain Management
P.O. Box 1326 Trenton, New Jersey 08607

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