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: p25.man MAN. PRACTICE: description 1 description 2 description 3 SLOPE: p25.slp CLIMATE: p25.cli Station: GRANT GROVE CA CLIGEN VER. 5.32 5.32 SOIL: p25.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 Sheephead-Rock outcrCOSL ANNUAL AVERAGE SUMMARIES ------------------------ I. RAINFALL AND RUNOFF SUMMARY -------- --- ------ ------- total summary: years 1 - 50 2848 storms produced 42792.20 mm of precipitation 67 rain storm runoff events produced 1948.94 mm of runoff 49 snow melts and/or events during winter produced 1117.16 mm of runoff annual averages --------------- Number of years 50 Mean annual precipitation 855.84 mm Mean annual runoff from rainfall 38.98 mm Mean annual runoff from snow melt and/or rain storm during winter 22.34 mm II. ON SITE EFFECTS ON SITE EFFECTS ON SITE EFFECTS --------------- --------------- --------------- A. AREA OF NET SOIL LOSS ** Soil Loss (Avg. of Net Detachment Areas) = 0.012 kg/m2 ** ** Maximum Soil Loss = 0.017 kg/m2 at 94.77 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) ------------------------------------------------------------------------ 17.55- 117.00 0.012 0.005 0.017 94.77 0.000 18.72 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) ------------------------------------------------------------------------ 1.17 0.000 1 40.95 0.007 1 80.73 0.016 1 2.34 0.000 1 42.12 0.008 1 81.90 0.016 1 3.51 0.000 1 43.29 0.008 1 83.07 0.016 1 4.68 0.000 1 44.46 0.008 1 84.24 0.016 1 5.85 0.000 1 45.63 0.008 1 85.41 0.017 1 7.02 0.000 1 46.80 0.008 1 86.58 0.017 1 8.19 0.000 1 47.97 0.008 1 87.75 0.017 1 9.36 0.000 1 49.14 0.008 1 88.92 0.017 1 10.53 0.000 1 50.31 0.008 1 90.09 0.017 1 11.70 0.000 1 51.48 0.009 1 91.26 0.017 1 12.87 0.000 1 52.65 0.009 1 92.43 0.017 1 14.04 0.000 1 53.82 0.009 1 93.60 0.017 1 15.21 0.000 1 54.99 0.009 1 94.77 0.017 1 16.38 0.000 1 56.16 0.010 1 95.94 0.017 1 17.55 0.000 1 57.33 0.010 1 97.11 0.017 1 18.72 0.000 1 58.50 0.010 1 98.28 0.017 1 19.89 0.001 1 59.67 0.011 1 99.45 0.017 1 21.06 0.001 1 60.84 0.011 1 100.62 0.017 1 22.23 0.001 1 62.01 0.011 1 101.79 0.017 1 23.40 0.002 1 63.18 0.012 1 102.96 0.017 1 24.57 0.002 1 64.35 0.012 1 104.13 0.017 1 25.74 0.003 1 65.52 0.012 1 105.30 0.017 1 26.91 0.003 1 66.69 0.013 1 106.47 0.016 1 28.08 0.004 1 67.86 0.013 1 107.64 0.016 1 29.25 0.004 1 69.03 0.013 1 108.81 0.016 1 30.42 0.005 1 70.20 0.014 1 109.98 0.016 1 31.59 0.006 1 71.37 0.014 1 111.15 0.016 1 32.76 0.006 1 72.54 0.015 1 112.32 0.016 1 33.93 0.007 1 73.71 0.015 1 113.49 0.015 1 35.10 0.007 1 74.88 0.015 1 114.66 0.015 1 36.27 0.007 1 76.05 0.016 1 115.83 0.015 1 37.44 0.007 1 77.22 0.016 1 117.00 0.015 1 38.61 0.007 1 78.39 0.016 1 39.78 0.007 1 79.56 0.016 1 note: (+) soil loss - detachment (-) soil loss - deposition III. OFF SITE EFFECTS OFF SITE EFFECTS OFF SITE EFFECTS ---------------- ---------------- ---------------- A. AVERAGE ANNUAL SEDIMENT LEAVING PROFILE 1.156 kg/m of width 924.409 kg (based on profile width of 799.700 m) 0.099 t/ha (assuming contributions from 9.356 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 10.0 0.026 0.026 2 0.010 2.65 0.0 100.0 0.0 0.0 0.042 0.042 3 0.030 1.80 0.0 68.9 31.1 3.1 0.180 0.180 4 0.300 1.60 79.0 15.9 5.1 0.5 0.352 0.352 5 0.200 2.65 100.0 0.0 0.0 0.0 0.400 0.400 ------------------------------------------------------------------------------- Average annual SSA enrichment ratio leaving profile = 1.00