why low impact development - san antonio river authority · bioswales. permeable pavements. planter...

Why Low Impact DevelopmentMarch 14, 2016

Museum Reach

Mission Reach

“States report that nonpoint source pollution is the leading remaining cause of water quality problems.”

US EPAhttp://www.epa.gov/owow_keep/NPS/whatis.html

Negative Impacts: Museum Reach, Southern Basin Erosion

Increased Flow = Increased Bacteria

A Sustainable Solution:Low Impact Development (LID)

• A land planning and engineering design approach that manages stormwater runoff as close as possible to the source.

• Emphasizes use of on-site natural features.

• Attempts to match pre-development hydrology.

• Polishes water for quality

How does LID work?

Source: Bender Wells Clark Design

Source: Tetra Tech

Source: Bender Wells Clark Design

Source: Tetra Tech

Source: Tetra Tech

Source: Tetra Tech

Distributed Systems

Pollutant Removal

Pollutant removal depths in a bioretention area.

Solutions for retrofits: highly urban area

Bioretention Green Roof Planter Box

Planter Box Stormwater Cisterns Stormwater Cisterns

Every Drop Counts.

Bioretention Bioswales Permeable Pavements

Planter Boxes Tree Wells Stormwater Cisterns

Solutions for retrofits: tight development envelope

Stormwater Wetlands Permeable Pavement Parking Lot Bioretention

Bioretention at the curb Sand Filter Filter Strips

Solutions within a spacious setting

BMPs on SARA Sites

SARA Operations Center, SA, TX

SARA Environmental Center, SA, TX

SARA Operations Center, SA, TX

SARA Operations Center, SA, TX

SARA Operations Center, SA, TX

SARA Operations Center, SA, TX

The LID Toolbox:San Antonio River Basin LID Technical Design Guidance Manual

Bioretention Rainwater Capture Bioswales

Vegetated Filter Permeable Pavement Green Roof

Sand Filter Planters Constructed Wetland

For more information about LID design

Visit our website at: https://www.sara-tx.org

For the design guidance manual, type LID in the search bar.