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HomeMy WebLinkAboutWPO201800019 Study 2018-07-19MEMORANDUM - River Run FROM: Ecosystem Services, LLC Hydrologic Analysis 1739 Allied St., Suite A Charlottesville, VA 22903 540.239.1428 www.ecosystemservices.us info@ecosystemservices.us July 19, 2018 SUBJECT: River Run Hydrologic Analysis Overview— Objectives, Procedure, and Outputs Objectives: • Create a calibrated existing conditions hydrologic model • Iterate a proposed conditions hydrologic model for hydraulic modeling and stream restoration design Procedure: • Installed stream gage and rain gage • Parameterized existing conditions model using VGIN landuse data, WSS soils data, total station survey data, and watershed assessment data collected on the pond upstream of the project • Calibrated the existing conditions model to the storm event on 11/4/2017 • Parameterized the proposed conditions model based on the proposed grading Outputs: • Soils and landuse maps (see attachments) • Peak pond inflow rate comparison between proposed and existing conditions: • Water quality reduction comparison: Recurrence Interval Model Output Description 1YR 2YR 5YR 10YR 25YR 50YR 100YR Existing Peak Outflow (cfs) 50.36 69.33 98.55 108.70 125.50 137.70 150.50 Proposed Peak Outflow (cfs) 50.48 68.92 100.4 125.5 161.7 192.1 226.8 • Water quality reduction comparison: Attachments: 1. Watershed soils map 2. Watershed landuse map 3. VRRM Spreadsheet 4. Existing BMP water quality reduction spreadsheet 5. PCSWMM Model Outputs TP (Ib/yr) TN (Ib/yr) Existing (Detention Pond) 1.36 5.39 Proposed (Stream Restoration) 103.33 224.38 VRRM Retrofit Worksheet 0.52 2.31 Attachments: 1. Watershed soils map 2. Watershed landuse map 3. VRRM Spreadsheet 4. Existing BMP water quality reduction spreadsheet 5. PCSWMM Model Outputs Legend l Land Cover CLASS ID 11 - Hydro 21 - Impervious (extracted) 22 - Impervious (Local datasets) 31 - Barren 41 - Forest 42 - Tree 51 - Scrub/Shrub 61 - Harvested/Disturbed 71 - TurfGrass 81 - Pasture I 82 - Cropland i 91 - Woody Wetlands I0 92 - Emergent Wetlands 0! —im Ila j Landuse Area (acres) % of Total Impervious 8.96 31.77% Tre e 7.84 27.78% Turf Grass 6.74 23.87% Forest 4.68 16.58% TOTAL 28.21 0 70 140 28G Feet _ # 0♦ r . A .Tu Virginia Gel 1739 ALLIED ST SUITE A, CHARLOTTESVILLE, VIRGINIA contributor (540) 239 1428 ECOSYSTEMSERVICES.US 0 LANDUSE MAP RIVER RUN STREAM RESOTRATION SCALE: 1 INCH = 200 FEET PROJECT N 0: 17-0034 PM: CKA DRAWN BY: WKM SOURCE: WSS, VGIN DATE: 4/10/2018 SHEET: 1 OF 2 -_lam_. _•. Soil Symbol Acreage % Total Albemarle fine sandy loam Culpeperfine sandy loam 213 21B 5.52 10.66 19.57% 37.80% Water W 0.72 2.55% Hazel loam 39C 1.39 4.93% Culpeperfine sandy loam 21C 4.64 16.45% Hazel loam 39D 5.27 18.69% AN 0 70 140 280 39 Feet fi� Sie t4'0 E �. -21C>. 533 1k. `i... Ili e i/ 1739 ALLIED ST SUITE A, CHARLOTTESVILLE, VIRGINIA (540) 239 1428 ECOSYSTEMSERVICES.US 92 8 55B SOILS MAP RIVER RUN STREAM RESOTRATION SCALE: 1 INCH = 200 FEET PROJECT N 0: 17-0034 PM: CKA DRAWN BY: WKM SOURCE: WSS, VGIN DATE: 4/10/2018 SHEET: 1 OF 2 M Conversion or RR or Drainage Area Urban Impervious Urban Pervious Site ID Site Description Existing Practice Forest (acres) %IC %Turf P (in) Enhancement ST (acre) (acres) (acres) 91.02 Riverrun Conversion Dry Detention Pond I ST 21.54 7.86 10.31 3.36 37% 48% 1 1.00 Enter dimensions in Columns O -- U, OR water quality volume from comps and/or field measurements directly in Column Z Combo GIS - Estimated Soil Available Available Top estimated Total Target Storage IWS Ponding Dry Filter Wet Filter Gravel Bottom Ponding Storage Site ID Rv Practice Practice Surface Bottom Volume WQv CF ( ) ( Yes No / ) Depth ( in p ) Depth ( in p ) Depth ( in p ) Depth ( in p ) Surface Area Volume (CF) ( Volume Width (ft) Length (ft) Area (SF) Surface Area (CF) (field if (CF) (SF) ivalue 6204 1 6204 1 6204 1 91.02 10.451 29841.88 1 12 0 1 6204 0.00 16204.32 Existing Practice Efficiency Modification) - Putting an x in the box modifies the initia Total TP TN Runoff Depth Volume % Water Absence of Absence of a Undersized 1: D.A.<5 Undersized 2: Pollutant Pollutant TSS Pollutant Captured per Short Site ID Sum for Quality Notes Sediment micropool/protec ac + 3" orifice OR <12- Volume<2xWQV Load Load Load (lbs/yr) Impervious Acre Circuiting Projects in Volume Forebay tion at outlet hr drawdown (0.5"x IC) (lbs/yr) (lbs/yr) (in) Series* 91.02 1 21% 19.43 1 153.87 6,626.12 0.22 X X X Site ID I efficiency I Existing Removal (from Table A-5) - with Modified Efficiencies Pre -Retrofit Performance Discount Total Phosphorus Removal (%) Total Phosphorus Removal (lbs/yr) Total Nitrogen Removal (%) Total Nitrogen Removal (lbs/yr) Total TSS Removal N Total TSS Removal (lbs/yr) 91.02 30% 1 7% 1.36 1 4% 5.39 1 7% 463.83 EXISTING Legend D ing Is Des e ='WDT' ttchments efts 150 m 140- 120- 100--. 3 80 0 O 60- 40- 20- 0-- Fri 0-40-20-0-- Existing River—Ru n_V2_Existing Fri 17 3:00 6:00 9:00 12:00 15:00 18:00 21:00 Sat 18 Nov 2017 DatelTime Mosbys Ranch P j i. pec rn • � raF � a` r.' Lr raa• -"chath , w • 1 147 pd�, Ra � 4 � 220 200 180 160 140 120 0 100 PROPOSED a._ 1 YR_N OAA_Type_D_3.03in b._2YR_NOAA_Type_D_3.66in d._10YR_NOAA_Type_D_5.53i n e._25YR_NOAA_Type_D_6.8in g._100YR_NOAA_Type_D_9.09in Nov 2017 12:00 15:00 18:00 21:00 Sat 18 Date/Time EPA STORM WATER MANAGEMENT MODEL - VERSION 5.1 (Build 5.1.012) -------------------------------------------------------------- ************* Element ************* Count Number of rain gages ...... 1 Number of subcatchments ... 7 Number of nodes ........... 8 Number of links ........... 8 Number of pollutants ...... 0 Number of land uses ....... 0 Raingage Summary Data Recording Name Data Source Type Interval ------------------------------------------------------------------------ g. 100YR NOAA Type D 9.09in g. 100YR NOAA Type D 9.09in INTENSITY 6 min. ******************** Subcatchment Summary ******************** Name Area Width %Impery %Slope Rain Gage Outlet ------------------------------------------------------------------------------------ ----------------------- S18 Invert 0.68 138.75 0.49 17.1850 g. 100YR NOAA Type D 9.09in J36 JUNCTION 351.25 8.73 S22 J1 JUNCTION 0.51 324.43 0.00 25.5310 g. 100YR NOAA Type D 9.09in J4 J4 JUNCTION 350.49 S24_1 0.0 J5 0.19 107.98 6.75 25.9560 g. 100YR NOAA Type D 9.09in US Culvert 0.0 Outfall S24_2 349.15 7.65 1.77 389.31 6.75 25.9560 g. 100YR NOAA Type D 9.09in J1 S26 1.15 325.63 0.00 18.6470 g. 100YR NOAA Type D 9.09in Gage S3 22.92 2495.88 38.40 16.4350 g. 100YR NOAA Type D 9.09in US Culvert S37 1.02 188.12 2.60 21.6900 g. 100YR NOAA Type D 9.09in J51 Node Summary ************ Invert Max. Ponded External Name Type Elev. Depth Area Inflow ------------------------------------------------------------------------------- Gage JUNCTION 351.25 8.73 0.0 J1 JUNCTION 368.04 14.60 0.0 J36 JUNCTION 355.21 14.60 0.0 J4 JUNCTION 350.49 14.87 0.0 J5 JUNCTION 349.60 14.87 0.0 J51 JUNCTION 353.67 8.73 0.0 Outfall OUTFALL 349.15 7.65 0.0 US Culvert STORAGE 374.00 14.75 0.0 ************ Full Full Hyd. Max. Link Summary ************ Full Name From Node To Node Type Length %Slope Roughness ------------------------------------------------------------------------------------ Width Barrels Flow ------------------------------------------------------------------------------------ C1_1 J4 J5 CONDUIT 39.4 2.2645 0.0400 204.68 3.11 47.76 1 2440.17 C1_3 J5 Outfall CONDUIT 21.3 2.0858 0.0400 Downstream 7.65 169.73 3.04 51.32 C2_1 J51 Gage CONDUIT 84.3 2.8703 0.0400 C2_1 Gage 8.73 224.26 C2_2 Gage J4 CONDUIT 20.5 3.7221 0.0400 C2_2 Gage C3 J36 J51 CONDUIT 32.3 4.7780 0.0400 C4 J1 J36 CONDUIT 230.8 5.5674 0.0400 3395.61 C5 US -Culvert J1 CONDUIT 92.9 6.4304 0.0240 64.12 1 20072.09 OvF1 US -Culvert J1 CONDUIT 80.3 23.9677 0.0400 7.07 0.75 3.00 1 91.62 Cross Section Summary ********************* **************** Transect Summary **************** Transect Dam -Spillway Area: 0.0002 0.0009 0.0021 0.0037 0.0057 0.0107 0.0202 0.0312 0.0433 0.0567 0.0714 0.0876 0.1051 0.1236 0.1427 Full Full Hyd. Max. No. of Full Conduit Shape Depth Area Rad. Width Barrels Flow ------------------------------------------------------------------------------------ C1_1 Dwnstrm_Old_Dam 14.87 204.68 3.11 47.76 1 2440.17 C1_3 Downstream 7.65 169.73 3.04 51.32 1 1911.40 C2_1 Gage 8.73 224.26 2.29 90.25 1 2448.87 C2_2 Gage 8.73 224.26 2.29 90.25 1 2788.66 C3 RiverRun3 8.16 218.69 2.64 77.04 1 3395.61 C4 RiverRun4 14.60 574.11 7.97 64.12 1 20072.09 C5 CIRCULAR 3.00 7.07 0.75 3.00 1 91.62 OvF1 Dam 5.49 159.04 3.49 44.02 1 6651.62 -Spillway **************** Transect Summary **************** Transect Dam -Spillway Area: 0.0002 0.0009 0.0021 0.0037 0.0057 0.0107 0.0202 0.0312 0.0433 0.0567 0.0714 0.0876 0.1051 0.1236 0.1427 0.1625 0.1830 0.2039 0.2250 0.2463 0.2677 0.2892 0.3109 0.3328 0.3548 0.3769 0.3992 0.4217 0.4443 0.4671 0.4902 0.5137 0.5375 0.5617 0.5863 0.6112 0.6366 0.6623 0.6883 0.7148 0.7416 0.7689 0.7965 0.8244 0.8528 0.8815 0.9106 0.9400 0.9698 1.0000 Hrad: 0.0149 0.0297 0.0446 0.0594 0.0743 0.0687 0.0727 0.0891 0.1075 0.1259 0.1431 0.1602 0.1782 0.2012 0.2238 0.2461 0.2674 0.2955 0.3235 0.3513 0.3789 0.4063 0.4335 0.4605 0.4873 0.5140 0.5404 0.5667 0.5927 0.6161 0.6368 0.6574 0.6778 0.6978 0.7173 0.7367 0.7560 0.7752 0.7943 0.8132 0.8321 0.8509 0.8697 0.8885 0.9073 0.9260 0.9446 0.9632 0.9816 1.0000 Width: 0.0151 0.0302 0.0454 0.0605 0.0756 0.2572 0.3410 0.3809 0.4207 0.4620 0.5082 0.5545 0.5964 0.6186 0.6408 0.6631 0.6866 0.6922 0.6972 0.7022 0.7071 0.7121 0.7171 0.7221 0.7271 0.7321 0.7370 0.7420 0.7470 0.7555 0.7672 0.7790 0.7907 0.8028 0.8152 0.8277 0.8402 0.8527 0.8651 0.8776 0.8901 0.9026 0.9149 0.9271 0.9392 0.9514 0.9635 0.9757 0.9878 1.0000 Transect Downstream Area: 0.0008 0.0033 0.0072 0.0116 0.0163 0.0214 0.0269 0.0327 0.0388 0.0453 0.0522 0.0595 0.0672 0.0752 0.0836 0.0924 0.1016 0.1111 0.1211 0.1314 0.1421 0.1533 0.1651 0.1782 0.1926 0.2080 0.2244 0.2419 0.2603 0.2800 0.3015 0.3250 0.3503 0.3775 0.4066 0.4375 0.4699 0.5038 0.5390 0.5756 0.6135 0.6526 0.6928 0.7342 0.7768 0.8200 0.8640 0.9087 0.9540 1.0000 Hrad: 0.0245 0.0490 0.0830 0.1208 0.1552 0.1873 0.2175 0.2462 0.2738 0.3000 0.3251 0.3496 0.3737 0.3974 0.4209 0.4441 0.4669 0.4895 0.5119 0.5327 0.5517 0.5713 0.5722 0.5554 0.5625 0.5716 0.5822 0.5942 0.6050 0.6084 0.5999 0.6019 0.6080 0.6136 0.6224 0.6367 0.6562 0.6761 0.6967 0.7202 0.7432 0.7680 0.7933 0.8176 0.8466 0.8771 0.9072 0.9373 0.9688 1.0000 Width: 0.0359 0.0715 0.0908 0.0983 0.1060 0.1137 0.1214 0.1292 0.1369 0.1450 0.1532 0.1615 0.1697 0.1779 0.1860 0.1941 0.2022 0.2103 0.2184 0.2273 0.2373 0.2469 0.2670 0.3005 0.3222 0.3440 0.3657 0.3874 0.4109 0.4422 0.4878 0.5277 0.5664 0.6084 0.6491 0.6853 0.7161 0.7469 0.7774 0.8044 0.8320 0.8576 0.8825 0.9085 0.9270 0.9426 0.9583 0.9736 0.9868 1.0000 Transect Dwnstrm Old Dam Area: 0.0048 0.0119 0.0196 0.0277 0.0363 0.0455 0.0551 0.0652 0.0758 0.0869 0.0985 0.1106 0.1232 0.1363 0.1499 0.1640 0.1787 0.1940 0.2099 0.2263 0.2433 0.2608 0.2788 0.2973 0.3164 0.3359 0.3559 0.3764 0.3974 0.4190 0.4410 0.4635 0.4865 0.5100 0.5341 0.5586 0.5836 0.6091 0.6351 0.6617 0.6885 0.7156 0.7429 0.7703 0.7979 0.8265 0.8566 0.8921 0.9344 1.0000 Hrad: 0.0633 0.1391 0.2033 0.2595 0.3099 0.3557 0.3982 0.4379 0.4755 0.5113 0.5457 0.5789 0.6110 0.6423 0.6722 0.7014 0.7304 0.7591 0.7876 0.8159 0.8443 0.8730 0.9014 0.9295 0.9573 0.9848 1.0121 1.0392 1.0661 1.0929 1.1194 1.1459 1.1722 1.1984 1.2244 1.2504 1.2762 1.3020 1.3276 1.3532 1.3811 1.4086 1.4355 1.4617 1.4867 1.4795 1.4788 1.3215 1.2164 1.0000 Width: 0.0996 0.1067 0.1138 0.1209 0.1280 0.1351 0.1422 0.1494 0.1565 0.1636 0.1707 0.1778 0.1849 0.1920 0.1999 0.2081 0.2163 0.2245 0.2327 0.2409 0.2488 0.2560 0.2632 0.2704 0.2777 0.2849 0.2921 0.2993 0.3066 0.3138 0.3210 0.3282 0.3354 0.3426 0.3498 0.3570 0.3642 0.3714 0.3786 0.3858 0.3888 0.3914 0.3941 0.3967 0.4000 0.4229 0.4441 0.5681 0.7647 1.0000 Transect Gage Area: 0.0011 0.0037 0.0074 0.0115 0.0158 0.0204 0.0251 0.0301 0.0353 0.0407 0.0464 0.0522 0.0581 0.0642 0.0703 0.0766 0.0829 0.0892 0.0957 0.1022 0.1088 0.1155 0.1223 0.1291 0.1360 0.1430 0.1501 0.1578 0.1661 0.1766 0.1894 0.2069 0.2269 0.2482 0.2708 0.2949 0.3204 0.3481 0.3794 0.4182 0.4608 0.5064 0.5556 0.6092 0.6688 0.7308 0.7950 0.8614 0.9301 1.0000 Hrad: 0.0512 0.0768 0.1305 0.1861 0.2369 0.2839 0.3277 0.3691 0.4083 0.4457 0.4816 0.5209 0.5583 0.5940 0.6286 0.6623 0.6946 0.7256 0.7553 0.7839 0.8114 0.8381 0.8639 0.8888 0.9130 0.9366 0.9586 0.9207 0.8730 0.7941 0.7437 0.6354 0.6613 0.6880 0.7130 0.7393 0.7665 0.7544 0.7061 0.6793 0.7058 0.7292 0.7452 0.7374 0.7640 0.8078 0.8512 0.8942 0.9392 1.0000 Width: 0.0211 0.0483 0.0566 0.0598 0.0629 0.0661 0.0693 0.0724 0.0756 0.0788 Transect RiverRun4 Area: 0.0018 0.0819 0.0835 0.0851 0.0867 0.0881 0.0327 0.0892 0.0903 0.0913 0.0924 0.0934 0.0778 0.0945 0.0956 0.0966 0.0977 0.0988 0.1499 0.0998 0.1054 0.1129 0.1316 0.1653 0.2761 0.1995 0.2756 0.2938 0.3121 0.3323 0.4377 0.3525 0.3726 0.4192 0.5013 0.5859 0.6080 0.6260 0.6709 0.7261 0.8132 0.8663 0.7842 0.8978 0.9293 0.9608 0.9897 1.0000 Transect RiverRun3 Hrad: Area: 0.0196 0.0509 0.0689 0.0877 0.1145 0.1394 0.0016 0.0040 0.0070 0.0103 0.0137 0.2664 0.0172 0.0208 0.0245 0.0284 0.0323 0.2730 0.0364 0.0405 0.0448 0.0491 0.0536 0.3513 0.0582 0.0629 0.0678 0.0731 0.0790 0.4888 0.0854 0.0923 0.0996 0.1075 0.1158 0.1249 0.1371 0.1536 0.1717 0.1911 0.2117 0.2335 0.2567 0.2817 0.3091 0.3387 0.3703 0.4049 0.4426 0.4832 0.5272 0.5733 0.6215 0.6715 0.7231 0.7760 0.8303 0.8859 0.9427 1.0000 Hrad: 0.0468 0.0843 0.1220 0.1667 0.2073 0.2443 0.2785 0.3103 0.3400 0.3681 0.3947 0.4200 0.4443 0.4675 0.4898 0.5113 0.5322 0.5420 0.5384 0.5391 0.5489 0.5628 0.5690 0.5854 0.6015 0.6161 0.5839 0.4480 0.4725 0.4982 0.5239 0.5496 0.5695 0.5800 0.5884 0.6088 0.6199 0.6227 0.6349 0.6438 0.6621 0.6920 0.7213 0.7548 0.7924 0.8296 0.8665 0.9031 0.9499 1.0000 Width: 0.0351 0.0472 0.0564 0.0582 0.0601 0.0619 0.0638 0.0657 0.0676 0.0694 0.0713 0.0732 0.0751 0.0769 0.0789 0.0808 0.0828 0.0878 0.0977 0.1075 0.1155 0.1227 0.1330 0.1403 0.1481 0.1796 0.2520 0.3049 0.3264 0.3475 0.3690 0.3908 0.4180 0.4552 0.4973 0.5302 0.5737 0.6300 0.6799 0.7369 0.7854 0.8196 0.8547 0.8843 0.9083 0.9323 0.9563 0.9803 0.9923 1.0000 Transect RiverRun4 Area: 0.0018 0.0052 0.0092 0.0144 0.0202 0.0263 0.0327 0.0394 0.0465 0.0539 0.0616 0.0695 0.0778 0.0863 0.0951 0.1047 0.1184 0.1335 0.1499 0.1675 0.1866 0.2070 0.2288 0.2519 0.2761 0.3013 0.3276 0.3549 0.3823 0.4099 0.4377 0.4657 0.4938 0.5221 0.5506 0.5792 0.6080 0.6370 0.6661 0.6954 0.7248 0.7544 0.7842 0.8142 0.8443 0.8746 0.9051 0.9361 0.9677 1.0000 Hrad: 0.0196 0.0509 0.0689 0.0877 0.1145 0.1394 0.1629 0.1852 0.2065 0.2269 0.2466 0.2664 0.2861 0.3049 0.3232 0.2637 0.2619 0.2730 0.2853 0.2973 0.3088 0.3211 0.3351 0.3513 0.3691 0.3869 0.4047 0.4293 0.4592 0.4888 Width: 0.5182 0.5473 0.5762 0.6050 0.6335 0.6617 0.6898 0.7177 0.7454 0.7729 0.8003 0.8274 0.8543 0.8811 0.9077 0.9342 0.9570 0.9714 0.9857 1.0000 0.1008 0.1098 0.1408 0.1725 0.1822 0.1919 0.2017 0.2114 0.2211 0.2309 0.2406 0.2493 0.2571 0.2655 0.2738 0.3837 0.4428 0.4823 0.5211 0.5617 0.6051 0.6484 0.6893 0.7256 0.7580 0.7904 0.8228 0.8398 0.8448 0.8499 0.8550 0.8601 0.8652 0.8702 0.8753 0.8804 0.8855 0.8906 0.8956 0.9007 0.9058 0.9109 0.9160 0.9210 0.9261 0.9312 0.9409 0.9603 0.9801 1.0000 Transect UpstreamOfDam Area: Hrad: Width: 0.0020 0.0082 0.0165 0.0254 0.0348 0.0446 0.0550 0.0658 0.0771 0.0889 0.1012 0.1140 0.1272 0.1409 0.1550 0.1695 0.1845 0.2000 0.2160 0.2326 0.2501 0.2684 0.2872 0.3064 0.3262 0.3464 0.3670 0.3881 0.4098 0.4322 0.4553 0.4790 0.5032 0.5278 0.5531 0.5790 0.6055 0.6325 0.6602 0.6884 0.7172 0.7467 0.7767 0.8074 0.8386 0.8702 0.9021 0.9344 0.9670 1.0000 0.0181 0.0385 0.0684 0.0992 0.1284 0.1563 0.1830 0.2089 0.2336 0.2576 0.2810 0.3038 0.3279 0.3516 0.3739 0.3957 0.4164 0.4367 0.4568 0.4692 0.4785 0.4969 0.5175 0.5379 0.5580 0.5793 0.6014 0.6193 0.6327 0.6464 0.6609 0.6799 0.7005 0.7178 0.7336 0.7498 0.7684 0.7839 0.8006 0.8177 0.8347 0.8530 0.8631 0.8792 0.8989 0.9183 0.9390 0.9602 0.9813 1.0000 0.1194 0.2304 0.2604 0.2748 0.2891 0.3036 0.3185 0.3327 0.3477 0.3627 0.3777 0.3926 0.4049 0.4172 0.4306 0.4443 0.4591 0.4739 0.4888 0.5124 0.5407 0.5584 0.5729 0.5873 0.6018 0.6147 0.6263 0.6425 0.6638 0.6851 0.7057 0.7210 0.7343 0.7513 0.7699 0.7883 0.8038 0.8233 0.8414 0.8590 0.8768 0.8922 0.9155 0.9320 0.9443 0.9565 0.9672 0.9770 0.9867 1.0000 ********************************************************* NOTE: The summary statistics displayed in this report are based on results found at every computational time step, not just on results from each reporting time step. ********************************************************* Analysis Options Flow Units ............... CFS Process Models: Rainfall/Runoff ........ RDII ................... Snowmelt ............... Groundwater ............ Flow Routing ........... Ponding Allowed ........ Water Quality .......... Infiltration Method ...... Flow Routing Method ...... Starting Date ............ Ending Date .............. Antecedent Dry Days ...... Report Time Step ......... Wet Time Step ............ Dry Time Step ............ Routing Time Step ........ Variable Time Step ....... Maximum Trials ........... Number of Threads ........ Head Tolerance ........... Runoff Quantity Continuity Total Precipitation ...... Evaporation Loss ......... Infiltration Loss ........ Surface Runoff ........... Final Storage ............ Continuity Error (%) ..... ************************** Flow Routing Continuity ************************** Dry Weather Inflow ....... Wet Weather Inflow ....... Groundwater Inflow ....... RDII Inflow .............. External Inflow .......... External Outflow ......... Flooding Loss ............ Evaporation Loss ......... Exfiltration Loss ........ Initial Stored Volume .... Final Stored Volume ...... Continuity Error (%) ..... *************************** Time -Step Critical Elements *************************** Link C5 (7.32%) Link C1_3 (6.03%) Link C2_2 (2.20%) YES NO NO NO YES NO NO GREEN_AMPT DYNWAVE 11/17/2017 00:00:00 11/17/2017 23:54:00 0.0 00:01:00 00:01:00 00:05:00 5.00 sec YES 8 1 0.005000 ft Volume Depth acre-feet inches 21.356 9.080 0.000 0.000 8.004 3.403 13.272 5.643 0.084 0.036 -0.018 0.000 Volume Volume acre-feet 10^6 gal --------- 0.000 --------- 0.000 13.269 4.324 0.000 0.000 0.000 0.000 0.000 0.000 13.259 4.320 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.007 0.002 0.029 Highest Flow Instability Indexes All links are stable. ************************* Routing Time Step Summary ************************* Precip Minimum Time Step 0.93 sec Average Time Step 4.61 sec Maximum Time Step 5.00 sec Percent in Steady State 0.00 Average Iterations per Step 2.00 Percent Not Converging 0.00 Subcatchment Runoff Summary *************************** Total Total Total Total Total Total Peak Runoff ****************** Node Depth Summary ****************** -------------------------------------------------- Average Maximum Maximum Time of Max Reported Depth Precip Runon Evap Infil Runoff Runoff Runoff Coeff Feet days hr:min Feet --------------------------------------------------------------------------------- Gage Subcatchment 0.60 2.82 in in in in in 10^6 gal ------------------------------------------------------------------------------------ CFS 1.67 369.71 0 12:06 1.67 J36 -------------------- S18 0.52 2.70 9.08 0.00 0.00 4.52 4.56 0.08 4.22 0.502 353.53 0 12:06 3.04 J5 S22 0.67 2.88 9.08 0.00 0.00 3.46 5.46 0.08 4.38 0.601 356.43 0 12:06 2.76 Outfall S24_1 0.61 2.84 9.08 0.00 0.00 3.42 5.49 0.03 1.63 0.604 383.65 0 12:08 9.64 S24_2 9.08 0.00 0.00 3.79 5.28 0.25 12.97 0.582 S26 9.08 0.00 0.00 3.62 5.34 0.17 8.50 0.589 S3 9.08 0.00 0.00 3.30 5.75 3.58 192.32 0.633 S37 9.08 0.00 0.00 3.93 5.15 0.14 7.04 0.567 ****************** Node Depth Summary ****************** -------------------------------------------------- Average Maximum Maximum Time of Max Reported ******************* Node Inflow Summary Depth Depth HGL Occurrence Max Depth Node Type Feet Feet Feet days hr:min Feet --------------------------------------------------------------------------------- Gage JUNCTION 0.60 2.82 354.07 0 12:06 2.82 Jl JUNCTION 0.40 1.67 369.71 0 12:06 1.67 J36 JUNCTION 0.52 2.70 357.92 0 12:07 2.70 J4 JUNCTION 0.58 3.04 353.53 0 12:06 3.04 J5 JUNCTION 0.67 2.88 352.48 0 12:06 2.88 J51 JUNCTION 0.61 2.76 356.43 0 12:06 2.76 Outfall OUTFALL 0.61 2.84 351.99 0 12:06 2.84 US Culvert STORAGE 0.91 9.65 383.65 0 12:08 9.64 ******************* Node Inflow Summary ******************* ------------------------------------------------------------------------------------ ------------- Average Avg Maximum Maximum Maximum Max Lateral Total Flow Volume Pcnt Lateral Total Time of Max Inflow Inflow Balance Storage Unit 1000 ft3 Full Inflow Inflow Occurrence Full Volume Volume Error Node 1.613 Type CFS CFS days hr:min 10^6 gal 10^6 gal Percent ------------------------------------------------------------------------------------ ------------- Gage JUNCTION 8.50 146.75 0 12:06 0.166 4.25 0.002 J1 JUNCTION 12.97 128.69 0 12:06 0.253 3.86 0.028 J36 JUNCTION 4.22 132.62 0 12:06 0.0841 3.94 0.030 J4 JUNCTION 4.38 150.60 0 12:06 0.0752 4.32 0.005 J5 JUNCTION 0.00 150.61 0 12:06 0 4.32 0.006 J51 JUNCTION 7.04 138.92 0 12:06 0.142 4.08 0.009 Outfall OUTFALL 0.00 150.61 0 12:06 0 4.32 0.000 US Culvert STORAGE 193.95 193.95 0 12:06 3.6 3.6 0.001 ********************** Node Surcharge Summary ********************** No nodes were surcharged. ********************* Node Flooding Summary ********************* No nodes were flooded. Storage Volume Summary ********************** ------------------------------------------------------------------------------------ -------------- Average Avg Evap Exfil Maximum Max Time of Max Maximum Volume Pcnt Pcnt Pcnt Volume Pcnt Occurrence Outflow Storage Unit 1000 ft3 Full Loss Loss 1000 ft3 Full days hr:min CFS ------------------------------------------------------------------------------------ -------------- US_Culvert 1.613 2 0 0 32.573 37 0 12:08 117.61 *********************** Outfall Loading Summary *********************** ----------------------------------------------------------- Flow Avg Max Total Freq Flow Flow Volume Outfall Node Pcnt CFS CFS 10^6 gal ----------------------------------------------------------- Outfall 96.48 15.65 150.61 4.320 ----------------------------------------------------------- System 96.48 15.65 150.61 4.320 Link Flow Summary ----------------------------------------------------------------------------- Adjusted ---------- Maximum Time of Max Maximum Max/ Max/ /Actual IFlowl Occurrence Down IVelocl Full Full Link ----------------------------------------------------------------------------- Type CFS days hr:min ft/sec Flow Depth C1_1 Crit CHANNEL 150.61 0 12:06 8.51 0.06 0.20 C1_3 0.00 CHANNEL 150.61 0 12:06 7.52 0.08 0.37 C2_1 0.03 CHANNEL 138.94 0 12:07 8.11 0.06 0.32 C2_2 C2_1 CHANNEL 146.77 0 12:06 8.03 0.05 0.34 C3 0.01 CHANNEL 132.54 0 12:07 9.82 0.04 0.34 C4 0.00 CHANNEL 128.60 0 12:06 6.22 0.01 0.15 C5 0.80 CONDUIT 117.61 0 12:08 19.93 1.28 0.78 OvF1 CHANNEL 0.00 0 00:00 0.00 0.00 0.15 *************************** Flow Classification Summary *************************** Conduit Surcharge Summary ---------------------------------------------------------------------------- Hours Hours --------- Hours Full -------- Above Full Capacity Conduit Both Ends Upstream Dnstream Normal Flow Limited Adjusted ---------- Fraction of Time in Flow Class ---------- /Actual Up Down Sub Sup Up Down Norm Inlet Conduit ------------------------------------------------------------------------------------ Length Dry Dry Dry Crit Crit Crit Crit Ltd Ctrl C1_1 1.00 0.03 0.00 0.00 0.97 0.00 0.00 0.00 0.91 0.00 C1_3 1.00 0.03 0.00 0.00 0.97 0.00 0.00 0.00 0.00 0.00 C2_1 1.00 0.03 0.00 0.00 0.96 0.02 0.00 0.00 0.01 0.00 C2_2 1.00 0.03 0.00 0.00 0.14 0.83 0.00 0.00 0.01 0.00 C3 1.00 0.03 0.00 0.00 0.80 0.17 0.00 0.00 0.90 0.00 C4 1.00 0.03 0.00 0.00 0.43 0.54 0.00 0.00 0.96 0.00 C5 1.00 0.03 0.00 0.00 0.00 0.97 0.00 0.00 0.00 0.00 OvF1 1.00 0.03 0.97 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Conduit Surcharge Summary ---------------------------------------------------------------------------- Hours Hours --------- Hours Full -------- Above Full Capacity Conduit Both Ends Upstream Dnstream Normal Flow Limited ---------------------------------------------------------------------------- 05 0.01 0.42 0.01 0.35 0.01 Analysis begun on: Thu Mar 22 20:34:39 2018 Analysis ended on: Thu Mar 22 20:34:40 2018 Total elapsed time: 00:00:01