Annual; abbreviated (Metric Units) USDA WATER EROSION PREDICTION PROJECT ------------------------------------- HILLSLOPE PROFILE AND WATERSHED MODEL VERSION 2020.500 May 1, 2020 TO REPORT PROBLEMS OR TO BE PUT ON THE MAILING LIST FOR FUTURE WEPP MODEL RELEASES, PLEASE CONTACT: WEPP TECHNICAL SUPPORT USDA-AGRICULTURAL RESEARCH SERVICE NATIONAL SOIL EROSION RESEARCH LABORATORY 275 SOUTH RUSSELL STREET WEST LAFAYETTE, IN 47907-2077 USA PHONE: (765) 494-8673 FAX: (765) 494-5948 email: wepp@ecn.purdue.edu URL: http://topsoil.nserl.purdue.edu HILLSLOPE INPUT DATA FILES - VERSION 2020.500 May 1, 2020 MANAGEMENT: p78.man MAN. PRACTICE: description 1 description 2 description 3 SLOPE: p78.slp CLIMATE: p78.cli Station: TAHOE CA CLIGEN VER. 5.32 5.32 SOIL: p78.sol *** CAUTION *** SOIL FILE FORMAT IS NON-STANDARD WEPP User is solely responsible for entering CORRECT values for BD, SSC, THETFC, THETDR *** CAUTION *** PLANE 1 Watsonlake gravelly SPM ANNUAL AVERAGE SUMMARIES ------------------------ I. RAINFALL AND RUNOFF SUMMARY -------- --- ------ ------- total summary: years 1 - 30 2287 storms produced 35434.50 mm of precipitation 2 rain storm runoff events produced 13.54 mm of runoff 250 snow melts and/or events during winter produced 4005.06 mm of runoff annual averages --------------- Number of years 30 Mean annual precipitation 1181.15 mm Mean annual runoff from rainfall 0.45 mm Mean annual runoff from snow melt and/or rain storm during winter 133.50 mm II. ON SITE EFFECTS ON SITE EFFECTS ON SITE EFFECTS --------------- --------------- --------------- A. AREA OF NET SOIL LOSS ** Soil Loss (Avg. of Net Detachment Areas) = 0.005 kg/m2 ** ** Maximum Soil Loss = 0.020 kg/m2 at 360.56 meters ** Area of Soil Loss Soil Loss MAX MAX Loss MIN MIN Loss Net Loss MEAN STDEV Loss Point Loss Point (m) (kg/m2) (kg/m2) (kg/m2) (m) (kg/m2) (m) ------------------------------------------------------------------------ 0.00- 360.56 0.005 0.005 0.020 360.56 0.000 43.27 C. SOIL LOSS/DEPOSITION ALONG SLOPE PROFILE Profile distances are from top to bottom of hillslope distance soil flow distance soil flow distance soil flow (m) loss elem (m) loss elem (m) loss elem (kg/m2) (kg/m2) (kg/m2) ------------------------------------------------------------------------ 3.61 0.000 1 126.19 0.002 1 248.78 0.009 1 7.21 0.000 1 129.80 0.002 1 252.39 0.009 1 10.82 0.000 1 133.41 0.002 1 255.99 0.009 1 14.42 0.000 1 137.01 0.002 1 259.60 0.009 1 18.03 0.000 1 140.62 0.002 1 263.21 0.008 1 21.63 0.000 1 144.22 0.002 1 266.81 0.008 1 25.24 0.000 1 147.83 0.002 1 270.42 0.008 1 28.84 0.000 1 151.43 0.003 1 274.02 0.008 1 32.45 0.000 1 155.04 0.003 1 277.63 0.007 1 36.06 0.000 1 158.64 0.003 1 281.23 0.007 1 39.66 0.000 1 162.25 0.003 1 284.84 0.008 1 43.27 0.000 1 165.86 0.003 1 288.44 0.008 1 46.87 0.000 1 169.46 0.003 1 292.05 0.008 1 50.48 0.000 1 173.07 0.003 1 295.66 0.008 1 54.08 0.000 1 176.67 0.003 1 299.26 0.008 1 57.69 0.000 1 180.28 0.003 1 302.87 0.008 1 61.29 0.000 1 183.88 0.003 1 306.47 0.008 1 64.90 0.000 1 187.49 0.004 1 310.08 0.008 1 68.51 0.000 1 191.09 0.004 1 313.68 0.008 1 72.11 0.000 1 194.70 0.005 1 317.29 0.008 1 75.72 0.000 1 198.31 0.005 1 320.89 0.008 1 79.32 0.000 1 201.91 0.006 1 324.50 0.009 1 82.93 0.000 1 205.52 0.006 1 328.11 0.011 1 86.53 0.000 1 209.12 0.007 1 331.71 0.012 1 90.14 0.000 1 212.73 0.007 1 335.32 0.014 1 93.74 0.000 1 216.33 0.008 1 338.92 0.016 1 97.35 0.000 1 219.94 0.008 1 342.53 0.017 1 100.96 0.000 1 223.54 0.008 1 346.13 0.017 1 104.56 0.000 1 227.15 0.008 1 349.74 0.018 1 108.17 0.001 1 230.76 0.008 1 353.34 0.019 1 111.77 0.001 1 234.36 0.008 1 356.95 0.019 1 115.38 0.001 1 237.97 0.008 1 360.56 0.020 1 118.98 0.001 1 241.57 0.009 1 122.59 0.001 1 245.18 0.009 1 note: (+) soil loss - detachment (-) soil loss - deposition III. OFF SITE EFFECTS OFF SITE EFFECTS OFF SITE EFFECTS ---------------- ---------------- ---------------- A. AVERAGE ANNUAL SEDIMENT LEAVING PROFILE 1.832 kg/m of width 320.137 kg (based on profile width of 174.730 m) 0.051 t/ha (assuming contributions from 6.300 ha) B. SEDIMENT CHARACTERISTICS AND ENRICHMENT Sediment particle information leaving profile ------------------------------------------------------------------------------- Particle Composition Detached Fraction Class Diameter Specific --------------------------------- Sediment In Flow (mm) Gravity % Sand % Silt % Clay % O.M. Fraction Exiting ------------------------------------------------------------------------------- 1 0.002 2.60 0.0 0.0 100.0 91.9 0.024 0.025 2 0.010 2.65 0.0 100.0 0.0 0.0 0.072 0.073 3 0.030 1.80 0.0 72.1 27.9 25.7 0.167 0.167 4 0.300 1.60 79.0 14.3 6.7 6.2 0.326 0.325 5 0.200 2.65 100.0 0.0 0.0 0.0 0.412 0.410 ------------------------------------------------------------------------------- Average annual SSA enrichment ratio leaving profile = 1.00