CASE STUDIES: SWALE EFFECTIVENESS

Transcription

1 CASE STUDIES: SWALE EFFECTIVENESS B Y : M A R T Y W A N I E L I S T A A N D E R I C L I V I N G S T O N August, 2016 Escambia County

2 ACKNOWLEDGEMENTS The Low Impact Design BMP workshops were presented on August 24 and 25, 2016 at the Escambia County Central Office Complex in Pensacola. The Escambia County LID BMP Manual and the LID BMP Workshops were funded in part by a Section 319 Nonpoint Source Management Program Implementation grant from the U.S. Environmental Protection Agency through an agreement/contract with the Nonpoint Source Management Section of the Florida Department of Environmental Protection.

3 FDOT Project number: BDV 24 # August, User s Manual for the BMPTRAINS Model Marty Wanielista, Harvey Harper, Eric Livingston, Mike Hardin, Przemyslaw Kuzlo. and Ikiensinma Gogo-Abite RETENTION BASIN WET DETENTION / MAP EXFILTRATION TRENCH RAIN GARDEN SWALE USER DEFINED BMP PERVIOUS PAVEMENT GREENROOF VEGETATED NATURAL BUFFER STORMWATER HARVESTING RAINWATER HARVESTING VEGETATED FILTER STRIP FILTRATION LINED REUSE POND for Agriculture Reuse TREE WELL View Media Mixes GO TO COST ANALYSIS NOTE!!!: All individual system must be sized prior to being analyzed in conjunction with other systems. Please read instructions in the CATCHMENT AND TREATMENT SUMMARY RESULTS tab for more information. CATCHMENT AND TREATMENT SUMMARY RESULTS

4 BMPTRAINS Available from: BMPTRAINS Stormwater Best Management Practices Analysis Model (Version 8) Registration, Model, and User's Manual To be released before Nov of 2016

5 NAVIGATING the BMP Nutrient Model BMPTRAINS INTRODUCTION PAGE Model requires the use of Excel 2007 or newer 1) There is a users manual to help navigate this program and it is available at This program is compiled from stormwater management publications and deliberations during a two year review of the stormwater rule in the State of Florida. Input from the members of the Florida Department of Environmental Protection Stormwater Review Technical Advisory Committee and the staff and consultants from the State Water Management Districts is appreciated. The State Department of Transportation provided guidance and resources to compile this program. The Stormwater Management Academy is responsible for the content of this program. 2) This spreadsheet is best viewed at 1280 BY 1080 PIXELS screen resolution. If the maximum resolution of your computer screen is lower than 1280 BY 1080 PIXELS you can adjust the view in the Excel VIEW menu by zooming out to value smaller than 100 PERCENT. 3) This spreadsheet has incorporated ERROR MESSAGE WINDOWS. Your analysis is not valid unless ALL ERROR MESSAGE WINDOWS are clear. 4) PRINTING INSTRUCTIONS: Many options. One is to print the page to MICROSOFT OFFICE DOCUMENT IMAGE WRITER (typically the default) or ADOBE PDF, save the page as an image document, then print the document you saved. 5) Click on the button located on the top of this window titled CLICK HERE TO START to begin the analysis. Disclaimer: These workbooks were created to assist in the analysis of Best Management Practice calculations. All users are responsible for validating the accuracy of the internal calculations. If improvements are noted within this model, please Marty Wanielista, Ph.D., P.E. at martin.wanielista@ucf.edu with specific information so that revisions can be made. The authors of this program were Marty Wanielista, Mike Hardin, Harvey Harper, Eric Livingston, Christopher Kuzlo, Colin Miller, and Ikiensinma Gogo-Abite. The trial version 8.0 updates of this program were done by Marty Wanielista and Mike Hardin. This is trial version 8.0 of the program, updated on August 1, Comments are appreciated. NOTE: the HELP button on a page will take you to information related to that page

6 PROBLEM INFORMATION Project location is Liberty County Single catchment to be examined Area of 1.1 acres Specified removal efficiency of 80% A swale is to be used

7 Postdevelopment Conditions Predevelopment Conditions CATCHMENT SUMMARY Land use Catchment Agriculturalpasture Curve Number 80 %DCIA 0 Land use non-dcia Curve Number Highway 85 %DCIA 50 BMP Area [acre] 0.1

8 BMP DESIGN Catchment will use 0.1 acre swale Top width = 10 ft Bottom width = 0 ft (so triangular) Length (swale and highway) = 871 ft Highway width = 20 ft Average width of pervious area = 40 ft Swale slope = Manning s n = 0.05 Soil infiltration rate = 5 in/hr Swale side slope = 5 There is no swale block but there is a concentration reduction due to low slope

9 ZONE MAP DESIGNATED METEOROLOGICAL REGIONS (ZONES) IN FLORIDA Stormwater BMP Treatment Trains [BMPTRAINS ] PROBLEM MEAN ANNUAL RAINFALL MAP SOLUTION INTRODUCTION PAGE June 2007 by Harvey H. Harper, This program is compiled from stormwater From the introduction page click on the Click Here to Start button to management publications and deliberations THIS ONE!!! GO P.E., TO PhD., RAINWATER available at: HARVESTING SYSTEM during a two year review of the stormwater rule 2) This spreadsheet is best viewed point/docs/nonpoint/sw_treatment 1280 BY 1080 PIXELS screen proceed in to the State of Florida. General Site Information worksheet. Input from the members of the Florida Department of than 1280 BY 1080 PIXELS you can adjust the view in the Excel VIEW Select Environmental the Protection Reset Stormwater Input Review for Stormwater Treatment menu Analysis by zooming out button to value Stormwater smaller GO TO than to GENERAL Design 100 erase PERCENT. SITE Criteria any Technical Advisory Committee within the State of Florida dated existing and the data. staff and consultants from the 3) This spreadsheet has incorporated ERROR MESSAGE WINDOWS. State Water Management Districts is appreciated. are clear. P.E., PhD., available at: Enter the project name and select the meteorological zone in the General Site EXPANDED VIEW - NORTH- The State Department of Transportation provided 4) PRINTING INSTRUCTIONS: npoint/docs/nonpoint/sw_treatm Print the page to MICROSOFT OFFICE Information worksheet guidance and resources to compile this program. The CLICK HERE TO START Indicate Stormwater Management the mean Academy is responsible annual rainfall amount in the General Site saved. Information for the content of this program. EXPANDED VIEW - SOUTH worksheet. Select the Specified Removal Efficiency option from the type of analysis drop Disclaimer: These workbooks were created to assist in the analysis of Best Management Practice calculations. All users are responsible for validating the down menu in the General Site Information worksheet. Specify the desired removal efficiency. THIS IS A DRAFT DOCUMENT GO Isopleths TO SUBJECT GENERAL of Mean TO REVISION Annual SITE Precipitation INFORMATION in Florida from IMPORTANT NOTES!!! 1) NAVIGATE through this spreadsheet Source: by Evaluation using the appropriate of Current HARVESTING Stormwater Design SYSTEM Criteria window blocks that look just like within the State of Florida dated resolution. If the maximum resolution of ReportFinal_71907.pdf your computer screen is lower Source: Evaluation of Current June Your analysis is not valid unless EXPANDED 2007 by Harvey H. Harper, ALL ERROR MESSAGE VIEW - NORTH- WINDOWS DOCUMENT IMAGE WRITER (typically entreportfinal_71907.pdf the default) ADOBE PDF, EXPANDED VIEW - save the page as an image document, then print the document you 5) Click on the button located on the top of this window titled CLICK HERE TO START to begin the analysis. accuracy of the internal calculations. If improvements are noted within this model, please Marty Wanielista, Ph.D., P.E. at martin.wanielista@ucf.edu with specific information so that revisions can be made. The authors of this program were Christopher Kuzlo, Marty Wanielista, Mike Hardin, and Ikiensinma Gogo-Abite. This is version 5.5 of the program, updated on September Comments are appreciated. GO TO STORMWATER

10 PROBLEM SOLUTION GO TO WATERSHED CHARACTERISTICS Select from the 14 different configurations You need to scroll down and right to see all configurations A E I M Select A the - Single Catchment 3 4 Go To Watershed Characteristics button to proceed to the 3 M - Mixed-4 Catchment-2 Series B 3 I - Mixed-4 Catchment-Series (A) Watershed Characteristics E - 3 Catchment-Parallel worksheet. 1 2 F J 1 2 N 3 2 B - 2 Catchment-Series 1 3 Select a catchment configuration from the drop 4 down menu; C J - Mixed-4 Catchment-3 Series-Parallel 1 2 for diagrams of the different catchment configurations K available, click the View F - Mixed-3 Catchment-2 Series-Parallel (A) Catchment Configuration G button to proceed to the Catchment Configuration 1 C - 2 Catchment-Parallel 2 4 N - Mixed-4 Catchment-2 Series-2 Parallel worksheet. 3 2 D G - Mixed-3 Catchment-2 Series-Parallel (B) K - Mixed-4 Catchment-Series (B) Go back to the Watershed H Characteristics worksheet L 1 by selecting the Go to D - 3 Catchment-Series H - 4 Catchment-Series 2 Watershed Characteristics button L - 4 Catchment-Parallel

11 PROBLEM SOLUTION From the Watershed Characteristics worksheet: Select the single catchment option from the drop down menu. Indicate the pre- and post-development land use, catchment areas, non-dcia Curve Number and DCIA percentage. Select the Stormwater Treatment Analysis button to proceed to the Stormwater Treatment Analysis worksheet.

12 Blue Numbers = PROBLEM GO TO GENERAL SITE SOLUTION INFORMATION PAGE STORMWATER TREATMENT ANALYSIS: Red Numbers = STEP 1: Specify pre- and post-development watershed characteristics. Input data Calculated or Carryover GO TO WATERSHED CHARACTERISTICS From the Total Stormwater Required Treatment Efficiency: Treatment Analysis worksheet Select the Swale Required Treatment Eff (Nitrogen): % button to proceed to the Swale worksheet Required Treatment Eff (Phosphorus): % Specify the required input in the Swale worksheet The example problem specifies additional concentration reduction, so select yes in the cell P6 STEP 2: Select one of the systems below to analyze efficiency. 1 RETENTION BASIN WET DETENTION EXFILTRATION TRENCH RAIN (BIO) GARDEN SWALE USER DEFINED BMP PERVIOUS PAVEMENT GREENROOF VEGETATED NATURAL BUFFER STORMWATER HARVESTING RAINWATER HARVESTING VEGETATED FILTER STRIP FILTRATION including BIOFILTRATION FLOATING ISLANDS WITH WET DETENTION VEGETATED AREA Example tree well LINED REUSE POND & UNDERDRAIN INPUT NOTE!!!: All individual system must be sized prior to being analyzed in conjunction with other systems. Please read instructions in the MULTIPLE WATERSHEDS AND TREATMENT SYSTEMS ANALYSIS tab for more information. CATCHMENT AND TREATMENT SUMMARY RESULTS

13 PROBLEM SOLUTION Blue Numbers = GO TO GENERAL SITE INFORMATION PAGE STORMWATER TREATMENT ANALYSIS: Red Numbers = STEP 1: Specify pre- and post-development watershed characteristics. Input data Calculated or Carryover GO TO WATERSHED CHARACTERISTICS Select the Go to Stormwater Treatment Analysis Button to go to the Total Required Treatment Efficiency: Stormwater Analysis worksheet Required Treatment Eff (Nitrogen): % Proceed Required to Treatment the Catchment Eff (Phosphorus): and % Treatment 1 Summary Results worksheet by clicking the Catchment and Treatment Summary Results button STEP 2: Select one of the systems below to analyze efficiency. RETENTION BASIN WET DETENTION EXFILTRATION TRENCH RAIN (BIO) GARDEN SWALE USER DEFINED BMP PERVIOUS PAVEMENT GREENROOF VEGETATED NATURAL BUFFER STORMWATER HARVESTING RAINWATER HARVESTING VEGETATED FILTER STRIP FILTRATION including BIOFILTRATION FLOATING ISLANDS WITH WET DETENTION VEGETATED AREA Example tree well LINED REUSE POND & UNDERDRAIN INPUT NOTE!!!: All individual system must be sized prior to being analyzed in conjunction with other systems. Please read instructions in the MULTIPLE WATERSHEDS AND TREATMENT SYSTEMS ANALYSIS tab for more information. CATCHMENT AND TREATMENT SUMMARY RESULTS

14 PROBLEM SOLUTION Examination of the Catchments and Treatment Summary Results worksheet shows that the provided overall efficiency does not achieve the required 80% To increase the removal efficiency, try modifying the swale, for example change the shape from triangular to trapezoidal.

15 SOME OBSERVATIONS Easy to use model allows you to easily try different designs and evaluate them Can evaluate swale designs 15 BMPs to choose from with the ability to use several different configurations Series Parallel Combination Summary sheet allows for quick and easy evaluation of design

16 QUESTIONS, REMARKS AND DISCUSSION THANK YOU!