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: p261.man MAN. PRACTICE: description 1 description 2 description 3 SLOPE: p261.slp CLIMATE: p261.cli Station: TAHOE CA CLIGEN VER. 5.32 5.32 SOIL: p261.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 Paige medial sandy lSPM ANNUAL AVERAGE SUMMARIES ------------------------ I. RAINFALL AND RUNOFF SUMMARY -------- --- ------ ------- total summary: years 1 - 30 2458 storms produced 43609.60 mm of precipitation 6 rain storm runoff events produced 104.81 mm of runoff 121 snow melts and/or events during winter produced 2921.05 mm of runoff annual averages --------------- Number of years 30 Mean annual precipitation 1453.65 mm Mean annual runoff from rainfall 3.49 mm Mean annual runoff from snow melt and/or rain storm during winter 97.37 mm II. ON SITE EFFECTS ON SITE EFFECTS ON SITE EFFECTS --------------- --------------- --------------- A. AREA OF NET SOIL LOSS ** Soil Loss (Avg. of Net Detachment Areas) = 0.035 kg/m2 ** ** Maximum Soil Loss = 0.136 kg/m2 at 237.69 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) ------------------------------------------------------------------------ 28.52- 237.69 0.035 0.037 0.136 237.69 0.000 30.90 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) ------------------------------------------------------------------------ 2.38 0.000 1 83.19 0.007 1 164.01 0.021 1 4.75 0.000 1 85.57 0.008 1 166.38 0.022 1 7.13 0.000 1 87.95 0.009 1 168.76 0.022 1 9.51 0.000 1 90.32 0.010 1 171.14 0.022 1 11.88 0.000 1 92.70 0.010 1 173.52 0.022 1 14.26 0.000 1 95.08 0.011 1 175.89 0.023 1 16.64 0.000 1 97.45 0.012 1 178.27 0.025 1 19.02 0.000 1 99.83 0.014 1 180.65 0.028 1 21.39 0.000 1 102.21 0.015 1 183.02 0.031 1 23.77 0.000 1 104.58 0.016 1 185.40 0.035 1 26.15 0.000 1 106.96 0.018 1 187.78 0.039 1 28.52 0.000 1 109.34 0.019 1 190.15 0.044 1 30.90 0.000 1 111.72 0.021 1 192.53 0.048 1 33.28 0.000 1 114.09 0.022 1 194.91 0.053 1 35.65 0.001 1 116.47 0.023 1 197.28 0.057 1 38.03 0.001 1 118.85 0.024 1 199.66 0.062 1 40.41 0.002 1 121.22 0.025 1 202.04 0.068 1 42.78 0.002 1 123.60 0.026 1 204.42 0.073 1 45.16 0.003 1 125.98 0.026 1 206.79 0.079 1 47.54 0.003 1 128.35 0.027 1 209.17 0.084 1 49.92 0.004 1 130.73 0.028 1 211.55 0.089 1 52.29 0.005 1 133.11 0.028 1 213.92 0.094 1 54.67 0.005 1 135.48 0.029 1 216.30 0.099 1 57.05 0.005 1 137.86 0.029 1 218.68 0.104 1 59.42 0.006 1 140.24 0.030 1 221.05 0.110 1 61.80 0.006 1 142.62 0.030 1 223.43 0.115 1 64.18 0.006 1 144.99 0.030 1 225.81 0.118 1 66.55 0.006 1 147.37 0.029 1 228.18 0.122 1 68.93 0.006 1 149.75 0.027 1 230.56 0.126 1 71.31 0.006 1 152.12 0.026 1 232.94 0.129 1 73.68 0.006 1 154.50 0.024 1 235.32 0.133 1 76.06 0.007 1 156.88 0.023 1 237.69 0.136 1 78.44 0.006 1 159.25 0.021 1 80.82 0.007 1 161.63 0.021 1 note: (+) soil loss - detachment (-) soil loss - deposition III. OFF SITE EFFECTS OFF SITE EFFECTS OFF SITE EFFECTS ---------------- ---------------- ---------------- A. AVERAGE ANNUAL SEDIMENT LEAVING PROFILE 7.234 kg/m of width 1752.961 kg (based on profile width of 242.330 m) 0.304 t/ha (assuming contributions from 5.760 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 0.0 100.0 200.0 0.010 0.010 2 0.010 2.65 0.0 100.0 0.0 0.0 0.223 0.223 3 0.030 1.80 0.0 88.1 11.9 23.9 0.072 0.072 4 0.300 1.60 80.6 5.6 13.8 27.6 0.152 0.152 5 0.200 2.65 100.0 0.0 0.0 0.0 0.542 0.542 ------------------------------------------------------------------------------- Average annual SSA enrichment ratio leaving profile = 1.00