Knox County Tennessee Stormwater Management Manual
4.3.5 Bioretention Areas
General Application Stormwater BMP
Description: Shallow stormwater basin or landscaped area that utilizes engineered soils and vegetation to capture and treat runoff.
APPENDIX D-2 Bioretention Area Design Example
Base Data Site Area = Total Drainage Area (A) = 3.0 ac Impervious Area = 1.9 ac; or I =1.9/3.0 = 63.3% Soils Type C Figure 1. Etowah Recreation Center Site Plan
Hydrologic Data CN tc Pre 70 .39 Post 88 .20
Description Bioretention areas are landscaping features adapted to provide on-site treatment of storm water runoff. They are commonly located in parking lot islands or within small pockets of residential land uses. Surface runoff is directed
3.3.9 Alum Treatment System
Limited Application Structural Stormwater Control
Description: Chemical treatment of stormwater runoff entering a wet pond by injecting liquid alum into storm sewer lines on a flow-weighted basis during rain events.
Alum Treatment of Stormwater Runoff An Innovative BMP for Urban Runoff Problems
Harvey H. Harper, Ph.D., P.E. and Jeffrey L. Herr, P.E. Environmental Research & Design, Inc. Orlando, Florida Eric H. Livingston Florida Department of Environmental Protectio
ALUM TREATMENT OF STORMWATER: THE FIRST TEN YEARS Harvey H. Harper, Ph.D., P.E. and Jeffrey L. Herr, P.E. Environmental Research & Design, Inc. 3419 Trentwood Blvd., Suite 102; Orlando, FL 32812-4863 Phone: (407) 855-9465; Fax: (407) 826-0419; email: hhar