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 3.2.9 - Bioretention Areas<br />
3.2.9 Bioretention Areas Primary Water Quality Facility<br />
Description: Shallow stormwater basin or landscaped<br />
area that utilizes engineered soils and vegetation to<br />
capture and treat run<strong>of</strong>f.<br />
KEY CONSIDERATIONS<br />
DESIGN CRITERIA:<br />
• Maximum contributing drainage area <strong>of</strong> 5 acres (< 2<br />
acres recommended)<br />
• Treatment area consists <strong>of</strong> grass filter, sand bed,<br />
ponding area, organic/mulch layer, planting soil, and<br />
vegetation<br />
• Typically requires 5 feet <strong>of</strong> head<br />
ADVANTAGES / BENEFITS:<br />
• Applicable to small drainage areas<br />
• Good for highly impervious areas, flexible siting<br />
• Relatively low maintenance requirements<br />
• Can be planned as an aesthetic feature<br />
DISADVANTAGES / LIMITATIONS:<br />
• Requires extensive landscaping<br />
• Not recommended for areas with steep slopes<br />
MAINTENANCE REQUIREMENTS:<br />
• Inspect and repair/replace treatment area components<br />
• Prune and weed vegetation<br />
• Remove sediment from forebay and retention chamber<br />
• May require irrigation during establishment phase<br />
H<br />
M<br />
POLLUTANT REMOVAL<br />
Total Suspended Solids<br />
Nutrients – Total Phosphorus & Total Nitrogen<br />
STORMWATER MANAGEMENT<br />
SUITABILITY<br />
Water Quality Protection<br />
Channel Protectio<br />
On-Site Flood Control<br />
Downstream Flood Control<br />
IMPLEMENTATION CONSIDERATIONS<br />
M<br />
M<br />
L<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 (
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