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6Th Biennial Stormwater Research and Watershed Management Conference PROCEEDINGS 6th Biennial Stormwater Research and Watershed Management Conference September 14–17, 1999 • Tampa, Florida PROCEEDINGS OF THE SIXTH BIENNIAL STORMWATER RESEARCH AND WATERSHED MANAGEMENT CONFERENCE SEPTEMBER 14-17, 1999 FOUR POINTS SHERATON HOTEL TAMPA EAST TAMPA, FLORIDA Sponsored by the: Southwest Florida Water Management District Published by the: Southwest Florida Water Management District 2379 Broad Street Brooksville, Florida, 34609-6899 (352)796-7211 The Southwest Florida Water Management District (District) does not discriminate upon the basis of any individual’s disability status. This non-discrimination policy involves every aspect of the District’s functions, including one’s access to, participation, employment, or treatment in its programs or activities. Anyone requiring reasonable accommodation as provided for in the Americans With Disabilities Act should contact Gwen Brown, Resource Management Department, at (352) 796-7211 or 1-(800) 423-1476 (Florida), extension 4226; TDD ONLY 1-(800) 231-6103 (Florida); FAX (352) 754-6885/SUNCOM 663-6885. i Sixth Biennial Stormwater Research & Watershed Management Conference September 14-17, 1999 FOREWORD This conference is the sixth in a continuing series of symposia sponsored by the Southwest Florida Water Management District to disseminate the findings of current stormwater research, as well as the latest developments in watershed management. The conference was designed to provide a forum from which a wide range of stormwater treatment and watershed management ideas and issues could be discussed and debated, and where research results could receive initial peer review. The ultimate goal of the conference is to present the engineers, scientists, and regulators working in the field of stormwater and watershed management with the most current ideas and data available so that more efficient and cost-effective best management practices can be developed and implemented. It is our hope that this conference and these proceedings will contribute to this goal. The Sixth Biennial Stormwater Research and Watershed Management Conference was held September 14-17, 1999 at the Four Points Sheraton Hotel, Tampa, Florida and was attended by more than 250 government and consulting professionals. Thirty-six papers documenting various aspects of current stormwater research projects were presented. The conference proceedings include thirty complete papers and abstracts of the remaining six. Only the abstracts were printed for papers not available at the time the proceedings were compiled. The complete papers for these abstracts may be added to this document at a later date. Craig W. Dye Betty T. Rushton ACKNOWLEDGMENTS Diane Caban, the Administrative Secretary for the Environmental Section at the Southwest Florida Water Management District, was the person most responsible for the detailed planning and administration necessary to organize and conduct the Sixth Biennial Stormwater Research and Watershed Management Conference and the publication of the Proceedings. Barbara Pavone of the Ecologic Evaluation Section, was responsible for compiling and assembling the Proceedings. Gwen Brown and Josie Guillen of the Resource Management Department, provided additional valuable administrative support for the Conference. Allen Yarbrough of the Visual Communication Section, designed the conference logo and provided significant additional graphics support. John Frascone of the District’s Office Support Section, oversaw the printing of all conference materials, including the Proceedings. Keith Kolasa of the Environmental Section, oversaw converting the proceedings to digital format. Finally, Tom Goodson of the Technical Support Section, provided all Internet programming needed to assemble, format, and link the proceedings to the District’s Web site. ii Sixth Biennial Stormwater Research & Watershed Management Conference September 14-17, 1999 TABLE OF CONTENTS SESSION I - POLLUTANT SOURCES AND IMPACTS BULK ATMOSPHERIC DEPOSITION OF NUTRIENTS AND METALS IN THE TAMPA BAY REGION OF FLORIDA L. Kellie Dixon and Susan Murray, Mote Marine Laboratory, Sarasota, Florida ..........................................................1 GRASS AND LEAF DECOMPOSITION AND NUTRIENT RELEASE STUDY UNDER WET CONDITIONS Justin Strynchuk, John Royal, and Gordon England, P.E. Brevard County Surface Water Improvement, Viera, Florida ......................12 EVALUATION OF STORMWATER RUNOFF QUALITY AT FLORIDA TRANSIT MAINTENANCE FACILITIES Andrew Dzurik, Ph.D. and Danuta Leszcynska, Ph.D. Department of Civil Engineering, FAMU-FSU College of Engineering, Tallahassee, Florida ......................................................21 FLORIDA LAKE REGION AND THE RESPONSE TO STORMWATER PERTURBATIONS: SOUTHERN LAKE WALES RIDGE VS. LAKE WALES RIDGE TRANSITION LAKES IN HIGHLANDS COUNTY Clell J. Ford, Lakes Manager, Highlands Soil and Water Conservation District, Sebring, Florida .........................................................30 IMPACTS OF ATMOSPHERIC DEPOSITION ON STORMWATER QUALITY Michael P. Timpe, P.E., BCI Engineers & Scientists, Inc., Lakeland, Florida ........................................................31 LITTLE LAKE JACKSON STORMWATER RUNOFF ANALYSES Keith V. Kolasa, Environmental Scientist Southwest Florida Water Management District, Brooksville, Florida ................41 SESSION 2 - BEST MANAGEMENT PRACTICES IMPERVIOUS COVER, BENTHIC COMMUNITY HEALTH, AND STORMWATER BMPS: IS THERE A RELATIONSHIP? Eric H. Livingston, John R. Maxted, Richard R. Horner, and Christopher W. May Department of Environmental Protection, Tallahassee, Florida ....................60 Sixth Biennial Stormwater Research & Watershed Management Conference September 14-17, 1999 APPLICATION OF STORMWATER BMPS: PAST, PRESENT AND FUTURE Thomas R. Sear, P.E., Water Resources Program Manager, PBS&J, Inc., Winter Park, Florida ......................................................61 AN ASSESSMENT OF AN IN-LINE ALUM INJECTION FACILITY USED TO TREAT STORMWATER RUNOFF IN PINELLAS COUNTY, FLORIDA. David W. Carr, Environmental Scientist Southwest Florida Water Management District, Brooksville, Florida ................68 AN INNOVATIVE TAILWATER RECOVERY AND SEEPAGE-WATER INTERCEPTION SYSTEM Gary Bethune, P.E., Agricultural Engineer, Lutz, Florida and Allen Smajstrla, Ph.D., Professor Agricultural & Biological Engineering Dept., IFAS, University of Florida, Gainesville, Florida ......................................................80 LOW IMPACT PARKING LOT DESIGN REDUCES RUNOFF AND POLLUTANT LOADS Betty Rushton, Ph.D., Q.E.P. Southwest Florida Water Management District, Brooksville, Florida ................90 REMOVAL OF GROSS POLLUTANTS FROM STORMWATER RUNOFF USING LIQUID/SOLID SEPARATION STRUCTURES Jeffrey L. Herr, P.E. and Harvey H. Harper, Ph.D., P.E. Environmental Research & Design, Inc., Orlando, Florida .......................102 REMOVAL OF MICROBIAL INDICATORS FROM STORMWATER USING SAND FILTRATION, WET DETENTION, AND ALUM TREATMENT BEST MANAGEMENT PRACTICES Raymond C. Kurz, Ph.D. Southwest Florida Water Management District, Tampa, Florida ..................103 SUMMARY OF THREE INNOVATIVE STORM WATER BMPS Tim Schmitt, Environmental Scientist, Lauren Fillmore, Environmental Scientist, Greg Prelewicz, Environmental Engineer, Parsons Engineering Science, Inc., Fairfax, Virginia; Jim Wheeler, Environmental Engineer, U.S. EPA, Office of Wastewater Management, Washington, D.C.; and Walid Hatoum, Environmental Engineer, Parsons Engineering Science, Inc., Tampa, Florida ..............................................114 THE USE OF A CDS UNIT FOR SEDIMENT CONTROL IN BREVARD COUNTY Justin Strynchuk, John Royal and Gordon England, P.E. Brevard County Surface Water Improvement, Viera, Florida .....................124 Sixth Biennial Stormwater Research & Watershed Management Conference September 14-17, 1999 SESSION 3 - WATERSHED PLANNING BAYOU CHICO/MAGGIE’S DITCH WATERSHED RESTORATION Grady L. Marchman, P.E., MLT(ASCP) Northwest Florida Water Management District, Havana, Florida ..................134 DEVELOPING NONPOINT SOURCE WATER QUALITY LEVELS OF SERVICE FOR HILLSBOROUGH COUNTY, FLORIDA Robert G. McConnell, Parsons Engineering Science, Inc.,Tampa, Florida; Elie G. Araj, Hillsborough County Department of Public Works, Tampa, Florida; and David T. Jones, CAiCE Software Corporation, Tampa, Florida ...................145 DEVELOPMENT OF A LOCAL WATER QUALITY INDEX FOR FRESHWATER LAKES C. Joe King, Lakes and Streams Manager Polk County Natural Resources, Bartow, Florida ..............................155 FLOOD MANAGEMENT COORDINATION WITH LOCAL GOVERNMENTS Gordon L. McClung, P.E., Engineering Section Manager Southwest Florida Water Management District, Brooksville, Florida ...............161 PERFORMANCE EVALUATION OF DRY DETENTION STORMWATER MANAGEMENT SYSTEMS Harvey H. Harper, Ph.D., P.E., Jeffrey L. Herr, P.E., and David Baker, E.I. Environmental Research & Design, Inc., Orlando, Florida; and Eric H. Livingston, Florida Department of Environmental Protection, Tallahassee, Florida ...................162 COMMUNITY RESPONSES TO RUNOFF POLLUTION: FINDING FROM CASE STUDIES ON STORMWATER POLLUTION CONTROL George P. Aponte Clarke, Policy Analyst, Natural Resources Defense Council, New York, New York; Peter H. Lehner, Chief, Environmental Protection Bureau, New York State Attorney General’s Office, New York, New York; Diane M. Cameron, President, Cameron Associates, Kensington, Maryland; and Andrew G. Frank, Litigation Associate Paul, Weiss, Rifkind, Wharton, and Garrison,
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