Using the NVCA Phosphorus Loading Development Tool
Contents
1. Low Intensity Residential 0 00 0 130 0 000 E Open Water 1 00 0 260 0 260 Transition 0 00 0 070 0 000 Total Area ha 4 00 0 43 Total Natural Heritage LOAD kg yr 3 Part 2 Urban Landuse Total Annual Precipitation mm yr 850 Fraction of Precipitation that produces Runoff 0 9 Impervious Area P coeff P load Landuse Area ha ha kg ha year kg year Pre Development NOTES gt Commercial 2 60 2 4 1 36 3 54 Residential 10 00 4 1 19 11 92 Total Area 12 60 15 46 Total URBAN LOAD kg yr Part 3 Cropland Landuse Add or Review Post Development Cropland Landuse There are several checks against both wetland land use and comparisons against pre and post development site areas on this screen As users enter the areas in each of the three land use categories they can at any time use the REFRESH button at the top of the screen to appraise them of the results of these comparisons The code is listed on the following page with comments about the impact of these results The procedural code is also executed when users push the Return to Main Screen button In some cases users will be unable to leave the screen and proceed to the next step until the pre and post areal totals match The procedural logic and code is as follows Total Development Area Open two record sets within the code as follows o Open for the development the user has open with the total PRE and POST dev2. Wetland Juh 28 14 Database Version Aarncultural Land use Class Total Natural Land use Class Total Development TOTAL V 0 2 BETA Release 29 Jul 14 P coeff Pload kofyr 0 47 2 35 0 26 0 78 3 14 Page 1 af 1 12 Page October 2014 Database Version V 0 3 BETA Release Update Date 42 Aug 14 Cropland Site Sediment and Phosphorus Pre Development EX PORT DEVELOPMENT Sample Calculation for Site with 2 Cropland Blocks Sub Area Block 1 R Rainfall Runoff for Lake Simcoe OQ K Soil erodability factor HH determined by slope Slope Area hak surface Slope Gradient Length Slope mk LS Slope length gradient factor C crop management factor P prevention capture Soil Loss kg veark Phosphorus export ka ha vr yk Phosphorus load kg yr Crop Type Factor Tillage Factor Sub Area Block 2 R Rainfall Runoff for Lake Simcoe K Soi erodabiliby factor NWN determined by slope Slope Area hak surface Slope Gradient Cay Length Of Slope LS slope length gradient factor C crop manaqem ent factor P prevention capture soil Loss kg veark Phosphorus export ka ha vr x Phosphorus load kori Crop Type Factor Tillage Type Factor PRE Developed AREA ha 6 0 Phosphorus Export ky 0 73 Phosphorus Load khak 3 14 August 12 14 Page 1 of 1 13 Page October 2014 Database Versi
3. Settling Controls Ditch Chexx Sediment Control Measures Settling Controls Ditch Swale Sediment Trap Sediment Control Measures Settling Controls Filter Berms Sediment Control Measures Settling Controls e Rock Check Dam Sediment Control Measures Settling Controls Sediment Control Ponds Sediment Control Measures Settling Controls Sediment Traps Sediment Control Measures Settling Controls Storm Drain Outfall Protection Sediment Control Measures Settling Controls Straw Bales Sediment Control Measures Settling Controls Straw Wood Fibre Logs Sediment Control Measures Settling Controls DATA SUMMARIES Each stage of the model allows users to review a data summary as an Access Report These reports can be printed or distributed as pdf documents Summaries include Phosphorus export coefficients by Landuse Pre Development landuse and Phosphorus Export with separate Cropland sub area review of all derived model parameters Post Development landuse and Phosphorus Export with separate Cropland sub area review of all derived model parameters Overall Development summary including Pre Development including Cropland model parameters Post Development including Cropland model parameters BMP application by landuse summary with efficiencies and rationale BMP application summary of load reductions with conclusion statement Construction BMP application checklist with rationale statements OO O UQ 10 Page October
4. all support reference data tables warehoused within this single file The database opens to a main screen all features of the database are accessed from this opening view The version code and date show in the lower portion of this screen and cannot be adjusted by users NVCA Phosphous Loading Development TOOL Sample Calculation for E with 2 Cropland Bloc Or add a NEW Development VIEW Selected Development MODULE 1 Estimate Pre Development Export MODULE 3 Add BMPs LIDs to Reduce Export MODULE 4 Complete Construction Phase BMP Checklist Project DEVELOPMENT SUMMARY DATABASE Reference and V 0 1 BETA Release Close Data Release Information 28 Jul 14 Application 2 Page October 2014 STEP 1 For a new development you will need to enter information about the development first a unique development name and date combination are required Other optional information includes the developer or agent name and a description of the development e g location size development type Mame of the DEVELOPMENT Sample Calculation for Site with 2 Cropland Blocks Enter the name of the DEVELOPMENT The model scenario date will default to the current date and can be adjusted The combination of these values must be unique and will relate to the application of any post development Development Scenario Date 28 Jul 14 Optionally fill out the fields below Agent Name HESL Stoneleigh DATA testing D
5. 2014 Sample Summary Reports PHOSPHORUS EXPORT COEFFICIENTS Development Updated July 2014 Notes Natural Her tage land uses mean phosphorus export for all monitored Lake Simcoe subwater sheds 7 derived using phosphorus loadsfrom CANWET modeling Monitored subwatersheds are those with sufficient measured datato validate and calibrate the model Open Water land use is calculated from the mean measured atmospheric load of 19 tonnes yr averaged over 5 yearsfrom 2002 to 2007 to the surface of Lake Simcoe surface area 722 km2 Scott et al 2006 LSRCA 2009 Cropland land uses are developed from the relationship between CANWET dermed phosphorus export for Lake Simcoe subwater sheds and soil loss Where soil los determined using the Universal Soil Loss Equation USLE Urban land uses are derived where TP iis total phosphorus concentration mg L in runoff measured from land use i from the SWAMP studies TRCA 2005 Precip is the annual precipitation mm yr Pj amp thefraction of Precip that produces runoff and Rv is the runoff coefficient 20 05 0 91 x impervious fraction following US EPA s Simple Method August 12 14 Page lofi 11 Page October 2014 PRE DEVELOPMENT Phosphorus EXPORT sample Calculation for Site with 2 Cropland Blocks DEVELOPMENT Agricultural Cropland Cropland Natural H eritaae Forest HayPasture Low Intensity Residential pen Water Transition Unpaved Roads
6. Part 3 Cropland Landuse to open the Cropland Landuse screen Enter the values shaded in yellow Values in green will be entered as either constants or filled in automatically from reference lookup tables in the database using the values you enter Fields shaded in blue are derived by the database using the formulae described in the Guidance Manual After users enter the necessary input values and press the tab to advance to the notes field the phosphorus load in kg year is derived automatically For Cropland areas must be divided into blocks with similar slope and slope length and phosphorus export calculated separately for each block There is no limit to the number of blocks for Cropland The total area of the 4 Page October 2014 development site is also derived automatically along with a total P load A summary of the pre development conditions can be viewed using the button provided EES Sample Calculation for Site with 2 Cropland Blocks PRESS to UPDATE all derived and calculated values Record M 4 1012 M pe TK No Filter Search Preview Pre Development Cropland Summary Report MODULE 2 Post development conditions can be added only after pre development conditions have been entered a blank screen will display if this is not the case You must also have selected a development using the drop down box on the main screen to display the information screen for post development conditions The screen illustration fol
7. October 2014 Using the NVCA Phosphorus Loading Development Tool The NVCA Tool for Managing New Urban Development in Phosphorus Sensitive Watersheds is a generic tool for estimating how phosphorus loads will change as lands are developed in Ontario watersheds located off the Precambrian Shield It is intended for use by the development community municipalities the MOE and Conservation Authorities as a scientifically sound method to assess if phosphorus loading from new development is maintained or reduced over pre development conditions by modelling Best management Practices BMPs and Low Impact Development LID techniques The Tool consists of three elements 1 A Technical Guidance Manual HESL 2014 that provides the reference materials used in developing the Tool and documents the derivation of export coefficients and estimation routines 2 A Microsoft ACCESS Database Tool that facilitates the calculation of a phosphorus budget for new development in accordance with the technical guidance and 3 A Database User s Manual this document that provides step by step instructions explaining the operation of the database The users manual was prepared by Stoneleigh Data for use with the Microsoft ACCESS Database Tool The NVCA has developed a web based application of the Tool that follows the same procedures and calculations as the ACCESS version but which differs in some features and operations This manual may not be completely co
8. e screen and shown below A new Development will be created and the message below will display when this button is pressed The name of the replicated development will be the same as the one that the user has selected with a suffix added containing the name replicate scenario followed by a data and time stamp enabling users to create multiple replicates on the same day Users should adjust this name by returning to the main screen and selecting it from the drop down list Adjustments to the post development information will also be required to distinguish it from the original Scenario Replication Message 1 The Development Scenario has been replicated Clase this screen and return ta the main screen and select it from the list 2 The new Development Scenario will have the same name with the replicatian sceanria and today s date and time appended You can adjust this name as required and proceed to the post development screen and make any necessary adjustments The replication includes all pre and post development landuse designations and relevant data It does not include the application of any BMPs Module 3 When users leave this view there is a check to see if the treatment area total exceeds the Pre development area total If so a warning message displays and users will not be able to leave this screen MODULE 4 For this Module a checklist of Construction Phase BMPs is provided The User will select BMPs that wi
9. e that you include the Wetland Land Use specified in the Pre Developed Area amp WET amp hectares in the Post Development If WETdiff lt 0 Then e Message Wetland area has been modified from the pre development scenario Please provide a rationale 7 October 2014 MODULE 3 The next step is to select the BMPs LIDs from the drop down list to be applied on the development site Some of them have defined efficiencies while others do not Efficiency values will be applied to reduce the load for that landuse by the value that you select enter Note that phosphorus reduction efficiencies that are greater than the default values can be applied to Runoff Reduction techniques e g 100 for infiltration if these are documented and supported in the Stormwater Management Plan for the site You will not be allowed to enter a BMP for wetlands If the removal efficiency for a block is achieved through one BMP then the user would simply choose that technique from the drop down menu If a SWM treatment train approach has been used then the user must document the rationale for the chosen removal efficiency in the SWM report plan for review and approval Enter information to the rationale field up to 255 characters may be typed along with the total efficiency in the field provided If users select Other as a BMP or adjust the efficiency value they will be prompted to enter a rationale Users may also adjust the efficiency from the base
10. elopment areas over all of the three land use categories o derive the difference between the PRE and POST development areas If PreArea PostArea Then e Message The Pre Development Total Area is GREATER than the current Post Development Total Area by amp AreaDiff amp Please review development areas to 6 Page October 2014 ensure that the area of the entire site is included in the pre and post development scenarios pre development area should equal post development area If PreArea PostArea Then e Message The Pre Development Total Area is LESS than the current PostDevelopment Total Area by amp AreaDiff 1 amp Please review development areas to ensure that the area of the entire site is included in the pre and post development scenarios pre development area should equal post development area Otherwise they are equal e Message The PreDevelopment Total Area EQUALS the current PostDevelopment Total Area Wetland Area Open two other record sets for the development that show the total PRE and POST development area that is WETLAND o l fthere is none display it as O hectares otherwise return the value If WETLAND 0 Then no need to warn the user about encroaching on wetland areas If WETLAND 0 There is WETLAND so check if development is encroaching on wetland areas Evaluate the and POST Wetland differences WETdiff PRE POST If WETdiff gt 0 Then e Message Please ensur
11. evelopment Description test NVCA database tool Return To Previous Screen The following 3 MODULES are entered in sequence as you enter the information about pre development conditions expected post development conditions including the development transformation of existing land uses and the application of BMPs LIDs The last MODULE contains a checklist of construction phase BMP s and is not part of the derivative phosphorus modeling The landuse options are contained in a drop down list reference table along with phosphorus export coefficients for all land uses except Cropland and Urban Lands which are calculated based on site characteristics With this release version these values may NOT be adjusted by the user These values are not watershed dependent and are considered valid for all areas off the Canadian Shield MODULE 1 Pre development conditions are entered by the user as displayed with the screen below Users must first have selected a development using the drop down box on the main screen before they will be able to gain access to this screen A listing of all phosphorus export coefficients and an overall summary of the Pre development conditions can also be viewed from this screen using the buttons provided Data is entered in three 3 parts as follows October 2014 Part 1 Enter the Natural Heritage Landuses as selected from the drop down list Enter the area of each land use and the corresponding phospho
12. le Calculation for Site with 2 Cropland Blocks Construction Phase BMP Applied Rationale Description Erosion Control Measures Hydroseeding Will be applied to exposed sol on sopes at the west end of property 4 ha Sediment Control Measures Perimeter Controls Sediment Sit Fence To be used at the base of sopes and along edge of stream at west end of property Vehicle Tracking Control Mud Mat To be installed at the entrance of the site August 12 14 Page 5 of5 16 Page
13. ll be used on the development site to minimize phosphorus loads from construction and provide a description of how the BMPs will be used i e area to be applied timing and duration of application etc 9 Page October 2014 Development Sample Calculation for Site with 2 Cropland Blocks Return to MAIN Screen MODULE 4 Checklist for application of Construction Phase BMP s for this Development Select BMPs that will be used on the development site to minimize phosphorus loads from construction and provide a description of how the BMPs will be used i e area to be applied timing and duration of application etc select the BMP from the list of choices Control Measure Type Description Hydroseeding 7 Erosion Control Measures Will be applied to exposed soil on slopes at the west end of property 4 ha Sediment Silt Fence z Sediment Control Measures To be used at the base of slopes and along edge of Perimeter Controls stream at west end of property b vehicle Tracking Control Mud Mat Sediment Control Measures To be installed at the entrance of the site Channel Soxx Sediment Control Measures Perimeter Controls Sediment Silt Fence Sediment Control Measures Perimeter Controls Interceptor Swale Dike Sediment Control Measures Perimeter Controls Silt Soxx Sediment Control Measures Perimeter Controls Vehicle Wheel Washers Sediment Control Measures Perimeter Controls Bulkheads within Storm Sewers Sediment Control Measures
14. lowing shows the development and pre and post development areas along with any wetland area at the top of the screen This upper information may not be adjusted and displays and updates automatically select the land use and enter the required input data as done for Module 1 using the lower part of the screen Area values can be entered to hundredths If the area of wetland is altered from the Pre Development scenario a warning flag will be posted on the screen and in the report as a reminder that wetland areas should be protected in the course of development and a recognition that changes may occur if approved The default phosphorus export coefficient is automatically entered from the lookup table or based on calculations for Cropland and Urban Land Uses and may not be adjusted The Cropland Landuse screen is identical to that of Module 1 Enter the cropland landuse in blocks as provided earlier 5 Page October 2014 Pre Development Wetland Development AREA ha AREA ha Return to MAIN Screen 16 60 1 00 Review Pre Development Review Post Development Post Development Area REFRESH and CHECK the Pre EXPORT Summary EXPORT Summary 16 60 and Post Developed Areas MODULE 2 Estimate Post Development Export of Phosphorus for this Development P coeff P load Landuse Area kg ha year kg year Pre Development NOTES _ Forest 2 00 0 060 0 120 Hay Pasture 7 0 00 0 080 0 000 4 hay 0 1 unpaved 0 5 LIR 8 crop
15. mpatible with the web based Tool and is intended only for use with the ACCESS version The Technical Guidance Manual and Database Tool are divided into four modules as follows Module 1 Estimates pre development phosphorus loads for representative land uses categorized in separate Natural Heritage Urban and Cropland sub types contained within the study site Module 2 Estimates post development phosphorus loads that are representative of the proposed land uses for the study site without BMPs and LID techniques to reduce phosphorus loads Module 3 Estimates the reduction in phosphorus loads from the post development scenario with implementation of BMPs and LID techniques and Hutchinson Environmental Sciences Ltd 2014 Managing New Urban Development in Phosphorus Sensitive Watersheds Prepared for Nottawasaga Valley Conservation Authority October 2014 65pp 1 Page October 2014 Module 4 Provides a checklist for users to guide selection and implementation of BMPs for the construction phase of development to minimize sediment loss and resultant phosphorus export The following User s Manual is not intended as a stand alone description of the Tool or the estimation process but as a set of instructions on operating the Microsoft ACCESS Database Tool The user must always rely on the Technical Guidance Manual as the primary technical source To start Save the database file to any folder
16. on V 0 2 BETA Release Update Date 29 01 14 POST DEVELOPMENT Phosphorus EXPORT Module 2 Area P coeff P Load ha kgha koyr Cropland Block 1 0 047 0 00 Cropland Block 2 0 0 25 0 00 Aaoricultural Land Class Total 0 0 0 00 Natural He taoe 0 Forest 2 0 06 0 12 HayPasture 008 0 00 Lowlntensity Residential 0 O13 0 00 Open Water 1 026 0 26 Transition 0 0 07 0 00 TurfSod 0 011 0 00 Unpaved Roads 0 83 0 00 Wetland 1 0 05 0 05 Natural Heritage Land use Class Total 4 0 0 43 Commercial 2 6 1 25 325 Residential 10 1 19 11 92 Urban Land use Class Total 126 15 16 POST Development Total 76 6 15 59 Juh23 14 Page 1of1 14 Page October 2014 Wet Detention Ponds Residential _ is Vegetaterd Fitter Strips Stream Buffers Reidental Bior tention Systems Comme cal Wet Detention Ponds Total PreDevelopment Area hak 16 60 PreDevelopment Area exduding Wetlands ha T 60 Total PotD evelopment Area ha 16 60 Total Area treated by BM P s hay 19 90 Treated Area total 11 90 Total PreDevelopment Load kg yr y 404 PostDevelopment Load kg r 15 59 Total P Load Reduction with BM P s kg yr 11 88 Minimum P Load Reduction Required 11 55 Total Post evelopment Load wath BM P s k g vr 3 72 Conclusion Ho Het Increasein P Load Juhy 28 14 Page 5 of5 15 Page October 2014 Database Version V 0 3 BETA Release DEVELOPMENT Update Date 12 Aug 14 Samp
17. reference value that is automatically inserted as you select a BMP from the drop down list You will be prompted to enter a rationale for this change The change will also be reflected in the Post Development summary report and both the base reference efficiency and the user adjusted value will display along with an information note A summary of the total development can also be produced from this page using a button located at the middle of the bottom of the screen Return to MAIN Development a Screen a Create a replicate Scenario 4 04 Refresh Development Summa No Net Increase in P Load Adjust Post Development Export of Phosphorus for this Sub Review PRE Development Summary overall efficiency and provide scientific rationale along with individual BMP efficiencies within the treatment train Review POST BMP P Development Select BMP Efficiency kg year Rationale Y Wet Detention Ponds 0 58 see attached Bioretention Systems 7 63 runoff reduction by infiltration not in the provided list Hay Pasture Low Intensity Residential 8 Page October 2014 The tool can be used to model multiple BMP LID scenarios to derive the optimum development plan by creating multiple scenarios of the same development with differing versions of post development land use and BMP implementation A procedure to create a replicate scenario can be executed using the button marked Create a replicate scenario at the top right of th
18. rus export coefficient P coeff will automatically populate and be used to derive the phosphorus load Part 2 Enter the total annual precipitation and the fraction that produces runoff in the boxes provided above the Part 2 data form Part 2 Urban Land Use as shown below Enter the Urban Landuses as selected from the drop down list along with both the total area and the portion that is impervious The phosphorus export coefficient and load will be derived automatically Development Sample Calculation for Site with 2 Cropland Blocks Return to MAIN Screen MODULE 1 Estimate Pre Development Export of Phosphorus for this Sub Watershed Development P coeff P load Landuse Area ha kg ha year kg year Pre Development NOTES gt 2 00 0 060 0 120 Hay Pasture 4 00 0 080 0 320 m Low Intensity Residential BI 0 50 0 130 0 065 Open Water Bl 1 00 0 260 0 260 Transition Z 0 00 0 070 0 000 Total Area 8 60 0 90 Total Natural Heritage LOAD kg yr 3 Part 2 Urban Landuse Total Annual Precipitation mm yr 850 Fraction of Precipitation that produces Runoff 0 9 Landuse Area ha ha kg ha year kg year Pre Development NOTES Total Area ha Total URBAN LOAD kg yr Part 3 Cropland Landuse Add or Review Pre Development Cropland Landuse Preview Pre Development EXPORT Summary iow Export Coefficients Part 3 Click on the button beside the Part 3 label
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