Volume 2-05, Chapter 3 - City of Wichita
Volume 2-05, Chapter 3 - City of Wichita
Volume 2-05, Chapter 3 - City of Wichita
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Section 3.4.4 - Modular Porous Paver Systems<br />
3.4.4 Modular Porous Paver Systems Other Water Quantity Facility<br />
Description: A pavement surface composed <strong>of</strong><br />
structural units with void areas that are filled with<br />
pervious materials such as sand, gravel or grass turf.<br />
Porous pavers are installed over a gravel base course<br />
that provides storage as run<strong>of</strong>f infiltrates through the<br />
porous paver system into underlying permeable soils.<br />
DESIGN CRITERIA:<br />
KEY CONSIDERATIONS<br />
• Intended for low volume traffic areas, or for residential or<br />
overflow parking applications<br />
• Should not be used in areas <strong>of</strong> soils with low permeability,<br />
wellhead protection zones, or recharge areas <strong>of</strong> water<br />
supply aquifer recharge<br />
• Soil infiltration rate <strong>of</strong> 0.5 in/hr or greater required, unless<br />
an underdrain is provided<br />
ADVANTAGES / BENEFITS:<br />
• Provides reduction in run<strong>of</strong>f volume<br />
• Available from commercial vendors<br />
DISADVANTAGES / LIMITATIONS:<br />
• Restrictions on use by heavy vehicles<br />
• High maintenance requirements<br />
• Potential for high failure rate if not adequately maintained<br />
or used in unstabilized areas<br />
• Potential for groundwater contamination<br />
• Not allowed for TSS removal<br />
POLLUTANT REMOVAL<br />
-- Total Suspended Solids<br />
H<br />
Nutrients – Total Phosphorus & Total Nitrogen<br />
STORMWATER MANAGEMENT<br />
SUITABILITY<br />
Water Quality Protection<br />
Channel Protection<br />
On-Site Flood Control<br />
Downstream Flood Control<br />
IMPLEMENTATION CONSIDERATIONS<br />
L<br />
M<br />
H<br />
Land Requirements<br />
Relative Capital Costs<br />
Maintenance Burden<br />
Residential Subdivision Use: Yes<br />
High Density/Ultra-Urban: Yes<br />
Drainage Area: 5 acres max<br />
Soils: Soil infiltration rate <strong>of</strong> 0.5 in/hr or<br />
greater required, unless an underdrain is<br />
provided<br />
L=Low M=Moderate H=High<br />
H<br />
Metals – Cadmium, Copper, Lead & Zinc<br />
-- Pathogens – Coliform, Streptococci & E. Coli<br />
<strong>Volume</strong> 2, Technical Guidance Page 3 - 201
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