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HomeMy WebLinkAboutSALISH ES MGSFLOOD OUTPUT REPORT ————————————————————————————————— MGS FLOOD SALISH ES PROJECT REPORT- FC AND WQ ANALYSIS Program Version: MGSFlood 4.46 Program License Number: 201410003 Project Simulation Performed on: 10/31/2019 5:43 PM Report Generation Date: 10/31/2019 5:44 PM ————————————————————————————————— Input File Name: WQ and FC Analysis.fld Project Name: Grant Street ES Analysis Title: WQ and FC Analysis Comments: ———————————————— PRECIPITATION INPUT ———————————————— Computational Time Step (Minutes): 15 Extended Precipitation Time Series Selected Climatic Region Number: 12 Full Period of Record Available used for Routing Precipitation Station : 96002805 Puget East 28 in_5min 10/01/1940-10/01/2003 Evaporation Station : 961028 Puget East 28 in MAP Evaporation Scale Factor : 0.750 HSPF Parameter Region Number: 1 HSPF Parameter Region Name : USGS Default ********** Default HSPF Parameters Used (Not Modified by User) *************** ********************** WATERSHED DEFINITION *********************** Predevelopment/Post Development Tributary Area Summary Predeveloped Post Developed Total Subbasin Area (acres) 10.468 10.349 Area of Links that Include Precip/Evap (acres) 0.000 0.119 Total (acres) 10.468 10.468 ----------------------SCENARIO: PREDEVELOPED Number of Subbasins: 2 ---------- Subbasin : Total Area of Disturbance ---------- -------Area (Acres) -------- Till Forest 4.584 Till Grass 5.409 ---------------------------------------------- Subbasin Total 9.993 ---------- Subbasin : Compensatory Area ---------- -------Area (Acres) -------- Till Forest 0.475 ---------------------------------------------- Subbasin Total 0.475 ----------------------SCENARIO: POSTDEVELOPED Number of Subbasins: 5 ---------- Subbasin : Trib to Detention ---------- -------Area (Acres) -------- Till Grass 2.068 Impervious 2.064 ---------------------------------------------- Subbasin Total 4.132 ---------- Subbasin : Trib to WQ Bio1&2 ---------- -------Area (Acres) -------- Till Grass 1.825 Impervious 2.312 ---------------------------------------------- Subbasin Total 4.137 ---------- Subbasin : Bypass Parking Lot ---------- -------Area (Acres) -------- Till Grass 0.278 Impervious 0.208 ---------------------------------------------- Subbasin Total 0.486 ---------- Subbasin : Bypass ---------- -------Area (Acres) -------- Till Grass 0.677 Impervious 0.377 ---------------------------------------------- Subbasin Total 1.054 ---------- Subbasin : Trib to WQ Bio3 ---------- -------Area (Acres) -------- Till Grass 0.049 Impervious 0.491 ---------------------------------------------- Subbasin Total 0.540 ************************* LINK DATA ******************************* ----------------------SCENARIO: PREDEVELOPED Number of Links: 1 ------------------------------------------ Link Name: Discharge Point Link Type: Copy Downstream Link: None ************************* LINK DATA ******************************* ----------------------SCENARIO: POSTDEVELOPED Number of Links: 6 ------------------------------------------ Link Name: Vault Link Type: Structure Downstream Link Name: Discharge Point Prismatic Pond Option Used Pond Floor Elevation (ft) : 158.34 Riser Crest Elevation (ft) : 164.84 Max Pond Elevation (ft) : 166.34 Storage Depth (ft) : 6.50 Pond Bottom Length (ft) : 82.0 Pond Bottom Width (ft) : 15.0 Pond Side Slopes (ft/ft) : L1= 0.00 L2= 0.00 W1= 0.00 W2= 0.00 Bottom Area (sq-ft) : 1230. Area at Riser Crest El (sq-ft) : 1,230. (acres) : 0.028 Volume at Riser Crest (cu-ft) : 7,995. (ac-ft) : 0.184 Area at Max Elevation (sq-ft) : 1230. (acres) : 0.028 Vol at Max Elevation (cu-ft) : 9,840. (ac-ft) : 0.226 Constant Infiltration Option Used Infiltration Rate (in/hr): 0.00 Riser Geometry Riser Structure Type : Circular Riser Diameter (in) : 12.00 Common Length (ft) : 0.010 Riser Crest Elevation : 164.84 ft Hydraulic Structure Geometry Number of Devices: 0 ------------------------------------------ Link Name: WQ Bio 1&2 Link Type: Bioretention Facility Downstream Link Name: Infiltration Trench Base Elevation (ft) : 170.00 Riser Crest Elevation (ft) : 170.58 Storage Depth (ft) : 0.58 Bottom Length (ft) : 63.9 Bottom Width (ft) : 63.9 Side Slopes (ft/ft) : L1= 3.00 L2= 3.00 W1= 3.00 W2= 3.00 Bottom Area (sq-ft) : 4087. Area at Riser Crest El (sq-ft) : 4,544. (acres) : 0.104 Volume at Riser Crest (cu-ft) : 4,954. (ac-ft) : 0.114 Infiltration on Bottom and Sideslopes Selected Soil Properties Biosoil Thickness (ft) : 1.50 Biosoil Saturated Hydraulic Conductivity (in/hr) : 2.00 Biosoil Porosity (Percent) : 40.00 Maximum Elevation of Bioretention Soil : 172.00 Native Soil Hydraulic Conductivity (in/hr) : 0.00 Underdrain Present Orifice NOT Present in Under Drain Riser Geometry Riser Structure Type : Circular Riser Diameter (in) : 12.00 Common Length (ft) : 0.000 Riser Crest Elevation : 170.58 ft Hydraulic Structure Geometry Number of Devices: 0 ------------------------------------------ Link Name: Infiltration Trench Link Type: Infiltration Trench Downstream Link Name: Vault Trench Type : Trench on Embankment Sideslope Trench Length (ft) : 82.00 Trench Width (ft) : 19.00 Trench Depth (ft) : 2.65 Trench Bottom Elev (ft) : 154.00 Trench Rockfill Porosity (%) : 30.00 Constant Infiltration Option Used Infiltration Rate (in/hr): 20.00 ------------------------------------------ Link Name: Discharge Point Link Type: Copy Downstream Link: None ------------------------------------------ Link Name: WQ Bio 4 Link Type: Bioretention Facility Downstream Link Name: Discharge Point Base Elevation (ft) : 158.00 Riser Crest Elevation (ft) : 158.58 Storage Depth (ft) : 0.58 Bottom Length (ft) : 18.8 Bottom Width (ft) : 18.8 Side Slopes (ft/ft) : L1= 3.00 L2= 3.00 W1= 3.00 W2= 3.00 Bottom Area (sq-ft) : 353. Area at Riser Crest El (sq-ft) : 496. (acres) : 0.011 Volume at Riser Crest (cu-ft) : 457. (ac-ft) : 0.010 Infiltration on Bottom and Sideslopes Selected Soil Properties Biosoil Thickness (ft) : 1.50 Biosoil Saturated Hydraulic Conductivity (in/hr) : 1.50 Biosoil Porosity (Percent) : 40.00 Maximum Elevation of Bioretention Soil : 160.00 Native Soil Hydraulic Conductivity (in/hr) : 0.00 Underdrain Present Orifice NOT Present in Under Drain Riser Geometry Riser Structure Type : Circular Riser Diameter (in) : 8.00 Common Length (ft) : 0.010 Riser Crest Elevation : 158.58 ft Hydraulic Structure Geometry Number of Devices: 0 ------------------------------------------ Link Name: WQ Bio 3 Link Type: Bioretention Facility Downstream Link Name: Infiltration Trench Base Elevation (ft) : 170.00 Riser Crest Elevation (ft) : 170.83 Storage Depth (ft) : 0.83 Bottom Length (ft) : 27.4 Bottom Width (ft) : 27.4 Side Slopes (ft/ft) : L1= 3.00 L2= 3.00 W1= 3.00 W2= 3.00 Bottom Area (sq-ft) : 752. Area at Riser Crest El (sq-ft) : 1,050. (acres) : 0.024 Volume at Riser Crest (cu-ft) : 1,195. (ac-ft) : 0.027 Infiltration on Bottom and Sideslopes Selected Soil Properties Biosoil Thickness (ft) : 1.50 Biosoil Saturated Hydraulic Conductivity (in/hr) : 2.00 Biosoil Porosity (Percent) : 40.00 Maximum Elevation of Bioretention Soil : 172.00 Native Soil Hydraulic Conductivity (in/hr) : 0.00 Underdrain Present Orifice NOT Present in Under Drain Riser Geometry Riser Structure Type : Circular Riser Diameter (in) : 12.00 Common Length (ft) : 0.000 Riser Crest Elevation : 170.83 ft Hydraulic Structure Geometry Number of Devices: 0 **********************FLOOD FREQUENCY AND DURATION STATISTICS******************* ----------------------SCENARIO: PREDEVELOPED Number of Subbasins: 2 Number of Links: 1 ********** Subbasin: Total Area of Disturbance ********** Flood Frequency Data(cfs) (Recurrence Interval Computed Using Gringorten Plotting Position) Tr (yrs) Flood Peak (cfs) ====================================== 2-Year 0.179 5-Year 0.325 10-Year 0.501 25-Year 0.980 50-Year 1.143 100-Year 1.426 200-Year ** ** Record too Short to Compute Peak Discharge for These Recurrence Intervals ********** Subbasin: Compensatory Area ********** Flood Frequency Data(cfs) (Recurrence Interval Computed Using Gringorten Plotting Position) Tr (yrs) Flood Peak (cfs) ====================================== 2-Year 3.386E-03 5-Year 6.000E-03 10-Year 8.936E-03 25-Year 9.804E-03 50-Year 1.214E-02 100-Year 1.624E-02 200-Year ** ** Record too Short to Compute Peak Discharge for These Recurrence Intervals ********** Link: Discharge Point ********** Link Inflow Frequency Stats Flood Frequency Data(cfs) (Recurrence Interval Computed Using Gringorten Plotting Position) Tr (yrs) Flood Peak (cfs) ====================================== 2-Year 0.181 5-Year 0.328 10-Year 0.507 25-Year 0.990 50-Year 1.144 100-Year 1.429 200-Year ** ** Record too Short to Compute Peak Discharge for These Recurrence Intervals ----------------------SCENARIO: POSTDEVELOPED Number of Subbasins: 5 Number of Links: 6 ********** Subbasin: Trib to Detention ********** Flood Frequency Data(cfs) (Recurrence Interval Computed Using Gringorten Plotting Position) Tr (yrs) Flood Peak (cfs) ====================================== 2-Year 0.639 5-Year 0.870 10-Year 1.103 25-Year 1.653 50-Year 1.706 100-Year 1.719 200-Year ** ** Record too Short to Compute Peak Discharge for These Recurrence Intervals ********** Subbasin: Trib to WQ Bio1&2 ********** Flood Frequency Data(cfs) (Recurrence Interval Computed Using Gringorten Plotting Position) Tr (yrs) Flood Peak (cfs) ====================================== 2-Year 0.710 5-Year 0.947 10-Year 1.232 25-Year 1.756 50-Year 1.819 100-Year 1.889 200-Year ** ** Record too Short to Compute Peak Discharge for These Recurrence Intervals ********** Subbasin: Bypass Parking Lot ********** Flood Frequency Data(cfs) (Recurrence Interval Computed Using Gringorten Plotting Position) Tr (yrs) Flood Peak (cfs) ====================================== 2-Year 6.526E-02 5-Year 9.299E-02 10-Year 0.118 25-Year 0.173 50-Year 0.183 100-Year 0.191 200-Year ** ** Record too Short to Compute Peak Discharge for These Recurrence Intervals ********** Subbasin: Bypass ********** Flood Frequency Data(cfs) (Recurrence Interval Computed Using Gringorten Plotting Position) Tr (yrs) Flood Peak (cfs) ====================================== 2-Year 0.122 5-Year 0.179 10-Year 0.220 25-Year 0.315 50-Year 0.367 100-Year 0.390 200-Year ** ** Record too Short to Compute Peak Discharge for These Recurrence Intervals ********** Subbasin: Trib to WQ Bio3 ********** Flood Frequency Data(cfs) (Recurrence Interval Computed Using Gringorten Plotting Position) Tr (yrs) Flood Peak (cfs) ====================================== 2-Year 0.142 5-Year 0.187 10-Year 0.236 25-Year 0.292 50-Year 0.342 100-Year 0.392 200-Year ** ** Record too Short to Compute Peak Discharge for These Recurrence Intervals ********** Link: Vault ********** Link Inflow Frequency Stats Flood Frequency Data(cfs) (Recurrence Interval Computed Using Gringorten Plotting Position) Tr (yrs) Flood Peak (cfs) ====================================== 2-Year 2.325E-06 5-Year 0.255 10-Year 0.879 25-Year 1.265 50-Year 1.493 100-Year 1.593 200-Year ** ** Record too Short to Compute Peak Discharge for These Recurrence Intervals ********** Link: Vault ********** Link Outflow 1 Frequency Stats Flood Frequency Data(cfs) (Recurrence Interval Computed Using Gringorten Plotting Position) Tr (yrs) Flood Peak (cfs) ====================================== 2-Year 2.039E-05 5-Year 3.974E-05 10-Year 5.079E-05 25-Year 0.516 50-Year 0.577 100-Year 0.662 200-Year ** ** Record too Short to Compute Peak Discharge for These Recurrence Intervals ********** Link: Vault ********** Link WSEL Stats WSEL Frequency Data(ft) (Recurrence Interval Computed Using Gringorten Plotting Position) Tr (yrs) WSEL Peak (ft) ====================================== 1.05-Year 158.762 1.11-Year 158.947 1.25-Year 159.287 2.00-Year 160.379 3.33-Year 161.388 5-Year 162.314 10-Year 163.419 25-Year 164.974 50-Year 164.985 100-Year 165.000 ********** Link: WQ Bio 1&2 ********** Link Inflow Frequency Stats Flood Frequency Data(cfs) (Recurrence Interval Computed Using Gringorten Plotting Position) Tr (yrs) Flood Peak (cfs) ====================================== 2-Year 0.710 5-Year 0.947 10-Year 1.232 25-Year 1.756 50-Year 1.819 100-Year 1.889 200-Year ** ** Record too Short to Compute Peak Discharge for These Recurrence Intervals ********** Link: WQ Bio 1&2 ********** Link Outflow 1 Frequency Stats Flood Frequency Data(cfs) (Recurrence Interval Computed Using Gringorten Plotting Position) Tr (yrs) Flood Peak (cfs) ====================================== 2-Year 0.266 5-Year 0.609 10-Year 0.870 25-Year 1.080 50-Year 1.194 100-Year 1.218 200-Year ** ** Record too Short to Compute Peak Discharge for These Recurrence Intervals ********** Link: WQ Bio 1&2 ********** Link WSEL Stats WSEL Frequency Data(ft) (Recurrence Interval Computed Using Gringorten Plotting Position) Tr (yrs) WSEL Peak (ft) ====================================== 1.05-Year 170.190 1.11-Year 170.245 1.25-Year 170.348 2.00-Year 170.609 3.33-Year 170.667 5-Year 170.692 10-Year 170.738 25-Year 170.772 50-Year 170.791 100-Year 170.795 ********** Link: Infiltration Trench ********** Link Inflow Frequency Stats Flood Frequency Data(cfs) (Recurrence Interval Computed Using Gringorten Plotting Position) Tr (yrs) Flood Peak (cfs) ====================================== 2-Year 0.926 5-Year 1.387 10-Year 1.805 25-Year 2.190 50-Year 2.418 100-Year 2.518 200-Year ** ** Record too Short to Compute Peak Discharge for These Recurrence Intervals ********** Link: Infiltration Trench ********** Link Outflow 1 Frequency Stats Flood Frequency Data(cfs) (Recurrence Interval Computed Using Gringorten Plotting Position) Tr (yrs) Flood Peak (cfs) ====================================== 2-Year 2.325E-06 5-Year 0.255 10-Year 0.879 25-Year 1.265 50-Year 1.493 100-Year 1.593 200-Year ** ** Record too Short to Compute Peak Discharge for These Recurrence Intervals ********** Link: Discharge Point ********** Link Inflow Frequency Stats Flood Frequency Data(cfs) (Recurrence Interval Computed Using Gringorten Plotting Position) Tr (yrs) Flood Peak (cfs) ====================================== 2-Year 0.146 5-Year 0.211 10-Year 0.332 25-Year 0.673 50-Year 0.762 100-Year 0.865 200-Year ** ** Record too Short to Compute Peak Discharge for These Recurrence Intervals ********** Link: WQ Bio 4 ********** Link Inflow Frequency Stats Flood Frequency Data(cfs) (Recurrence Interval Computed Using Gringorten Plotting Position) Tr (yrs) Flood Peak (cfs) ====================================== 2-Year 6.526E-02 5-Year 9.299E-02 10-Year 0.118 25-Year 0.173 50-Year 0.183 100-Year 0.191 200-Year ** ** Record too Short to Compute Peak Discharge for These Recurrence Intervals ********** Link: WQ Bio 4 ********** Link Outflow 1 Frequency Stats Flood Frequency Data(cfs) (Recurrence Interval Computed Using Gringorten Plotting Position) Tr (yrs) Flood Peak (cfs) ====================================== 2-Year 3.660E-02 5-Year 7.081E-02 10-Year 9.342E-02 25-Year 0.133 50-Year 0.135 100-Year 0.138 200-Year ** ** Record too Short to Compute Peak Discharge for These Recurrence Intervals ********** Link: WQ Bio 4 ********** Link WSEL Stats WSEL Frequency Data(ft) (Recurrence Interval Computed Using Gringorten Plotting Position) Tr (yrs) WSEL Peak (ft) ====================================== 1.05-Year 158.290 1.11-Year 158.381 1.25-Year 158.453 2.00-Year 158.599 3.33-Year 158.610 5-Year 158.618 10-Year 158.628 25-Year 158.644 50-Year 158.645 100-Year 158.646 ********** Link: WQ Bio 3 ********** Link Inflow Frequency Stats Flood Frequency Data(cfs) (Recurrence Interval Computed Using Gringorten Plotting Position) Tr (yrs) Flood Peak (cfs) ====================================== 2-Year 0.142 5-Year 0.187 10-Year 0.236 25-Year 0.292 50-Year 0.342 100-Year 0.392 200-Year ** ** Record too Short to Compute Peak Discharge for These Recurrence Intervals ********** Link: WQ Bio 3 ********** Link Outflow 1 Frequency Stats Flood Frequency Data(cfs) (Recurrence Interval Computed Using Gringorten Plotting Position) Tr (yrs) Flood Peak (cfs) ====================================== 2-Year 4.511E-02 5-Year 0.105 10-Year 0.154 25-Year 0.184 50-Year 0.215 100-Year 0.254 200-Year ** ** Record too Short to Compute Peak Discharge for These Recurrence Intervals ********** Link: WQ Bio 3 ********** Link WSEL Stats WSEL Frequency Data(ft) (Recurrence Interval Computed Using Gringorten Plotting Position) Tr (yrs) WSEL Peak (ft) ====================================== 1.05-Year 170.231 1.11-Year 170.329 1.25-Year 170.390 2.00-Year 170.632 3.33-Year 170.847 5-Year 170.860 10-Year 170.876 25-Year 170.884 50-Year 170.892 100-Year 170.902 ***********Groundwater Recharge Summary ************* Recharge is computed as input to Perlnd Groundwater Plus Infiltration in Structures Total Predeveloped Recharge During Simulation Model Element Recharge Amount (ac-ft) ----------------------------------------------------------------------------------------------- Subbasin: Total Area of Distur 321.816 Subbasin: Compensatory Area 17.153 Link: Discharge Point 0.000 _____________________________________ Total: 338.969 Total Post Developed Recharge During Simulation Model Element Recharge Amount (ac-ft) ----------------------------------------------------------------------------------------------- Subbasin: Trib to Detention 59.750 Subbasin: Trib to WQ Bio1&2 52.729 Subbasin: Bypass Parking Lot 8.032 Subbasin: Bypass 19.560 Subbasin: Trib to WQ Bio3 1.416 Link: Vault 0.000 Link: WQ Bio 1&2 0.000 Link: Infiltration Trench 729.695 Link: Discharge Point 0.000 Link: WQ Bio 4 0.000 Link: WQ Bio 3 0.000 _____________________________________ Total: 871.181 Total Predevelopment Recharge is Less than Post Developed Average Recharge Per Year, (Number of Years= 63) Predeveloped: 5.380 ac-ft/year, Post Developed: 13.828 ac-ft/year ***********Water Quality Facility Data ************* ----------------------SCENARIO: PREDEVELOPED Number of Links: 1 ********** Link: Discharge Point ********** Infiltration/Filtration Statistics-------------------- Inflow Volume (ac-ft): 263.23 Inflow Volume Including PPT-Evap (ac-ft): 263.23 Total Runoff Infiltrated (ac-ft): 0.00, 0.00% Total Runoff Filtered (ac-ft): 0.00, 0.00% Primary Outflow To Downstream System (ac-ft): 263.23 Secondary Outflow To Downstream System (ac-ft): 0.00 Percent Treated (Infiltrated+Filtered)/Total Volume: 0.00% ----------------------SCENARIO: POSTDEVELOPED Number of Links: 6 ********** Link: Vault ********** Basic Wet Pond Volume (91% Exceedance): 5356. cu-ft Computed Large Wet Pond Volume, 1.5*Basic Volume: 8033. cu-ft Infiltration/Filtration Statistics-------------------- Inflow Volume (ac-ft): 1.01 Inflow Volume Including PPT-Evap (ac-ft): 1.01 Total Runoff Infiltrated (ac-ft): 0.00, 0.00% Total Runoff Filtered (ac-ft): 0.00, 0.00% Primary Outflow To Downstream System (ac-ft): 0.98 Secondary Outflow To Downstream System (ac-ft): 0.00 Percent Treated (Infiltrated+Filtered)/Total Volume: 0.00% ********** Link: WQ Bio 1&2 ********** Infiltration/Filtration Statistics-------------------- Inflow Volume (ac-ft): 339.62 Inflow Volume Including PPT-Evap (ac-ft): 349.22 Total Runoff Infiltrated (ac-ft): 0.00, 0.00% Total Runoff Filtered (ac-ft): 347.12, 99.40% Primary Outflow To Downstream System (ac-ft): 349.60 Secondary Outflow To Downstream System (ac-ft): 0.00 Percent Treated (Infiltrated+Filtered)/Total Volume: 99.40% ********** Link: Infiltration Trench ********** Infiltration/Filtration Statistics-------------------- Inflow Volume (ac-ft): 730.74 Inflow Volume Including PPT-Evap (ac-ft): 730.74 Total Runoff Infiltrated (ac-ft): 729.69, 99.86% Total Runoff Filtered (ac-ft): 0.00, 0.00% Primary Outflow To Downstream System (ac-ft): 1.01 Secondary Outflow To Downstream System (ac-ft): 0.00 Percent Treated (Infiltrated+Filtered)/Total Volume: 99.86% ********** Link: Discharge Point ********** Infiltration/Filtration Statistics-------------------- Inflow Volume (ac-ft): 106.69 Inflow Volume Including PPT-Evap (ac-ft): 106.69 Total Runoff Infiltrated (ac-ft): 0.00, 0.00% Total Runoff Filtered (ac-ft): 0.00, 0.00% Primary Outflow To Downstream System (ac-ft): 106.69 Secondary Outflow To Downstream System (ac-ft): 0.00 Percent Treated (Infiltrated+Filtered)/Total Volume: 0.00% ********** Link: WQ Bio 4 ********** Infiltration/Filtration Statistics-------------------- Inflow Volume (ac-ft): 34.91 Inflow Volume Including PPT-Evap (ac-ft): 35.75 Total Runoff Infiltrated (ac-ft): 0.00, 0.00% Total Runoff Filtered (ac-ft): 35.40, 99.03% Primary Outflow To Downstream System (ac-ft): 35.79 Secondary Outflow To Downstream System (ac-ft): 0.00 Percent Treated (Infiltrated+Filtered)/Total Volume: 99.03% ********** Link: WQ Bio 3 ********** Infiltration/Filtration Statistics-------------------- Inflow Volume (ac-ft): 59.15 Inflow Volume Including PPT-Evap (ac-ft): 61.08 Total Runoff Infiltrated (ac-ft): 0.00, 0.00% Total Runoff Filtered (ac-ft): 60.92, 99.74% Primary Outflow To Downstream System (ac-ft): 61.14 Secondary Outflow To Downstream System (ac-ft): 0.00 Percent Treated (Infiltrated+Filtered)/Total Volume: 99.74% ***********Compliance Point Results ************* Scenario Predeveloped Compliance Link: Discharge Point Scenario Postdeveloped Compliance Link: Discharge Point *** Point of Compliance Flow Frequency Data *** Recurrence Interval Computed Using Gringorten Plotting Position Predevelopment Runoff Postdevelopment Runoff Tr (Years) Discharge (cfs) Tr (Years) Discharge (cfs) ---------------------------------------------------------------------------------------------------------------------- 2-Year 0.181 2-Year 0.146 5-Year 0.328 5-Year 0.211 10-Year 0.507 10-Year 0.332 25-Year 0.990 25-Year 0.673 50-Year 1.144 50-Year 0.762 100-Year 1.429 100-Year 0.865 200-Year ** 200-Year ** ** Record too Short to Compute Peak Discharge for These Recurrence Intervals **** Flow Duration Performance **** Excursion at Predeveloped 50%Q2 (Must be Less Than or Equal to 0%): -92.8% PASS Maximum Excursion from 50%Q2 to Q2 (Must be Less Than or Equal to 0%): -92.8% PASS Maximum Excursion from Q2 to Q50 (Must be less than 10%): -48.9% PASS Percent Excursion from Q2 to Q50 (Must be less than 50%): 0.0% PASS ------------------------------------------------------------------------------------------------- MEETS ALL FLOW DURATION DESIGN CRITERIA: PASS ------------------------------------------------------------------------------------------------- **** LID Duration Performance **** Excursion at Predeveloped 8%Q2 (Must be Less Than 0%): -64.3% PASS Maximum Excursion from 8%Q2 to 50%Q2 (Must be Less Than 0%): -64.3% PASS ------------------------------------------------------------------------------------------------- MEETS ALL LID DURATION DESIGN CRITERIA: PASS 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