Hydro HW 7 - Vincent Likewise CE 412/512 HW 7(1 a AI =...

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Vincent Likewise CE 412/512 5-26-08 HW 7 (1) a. AI = 1.414T 1.5 (2) a. Rain Runoff SS SS check inches inches lb lb/ac-in 0.08 0.024 12.4 53.8 12.39552 0.08 0.01 6.4 66.7 6.4032 0.31 0.06 6 10.4 5.9904 0.5 0.133 9.6 7.5 9.576 0.19 0.03 3.9 13.5 3.888 0.23 0.11 5.1 4.8 5.0688 0.3 0.09 8.3 9.6 8.2944 0.22 0.06 5.7 9.9 5.7024 0.11 0.025 21.1 87.9 21.096 0.13 0.029 19 68.2 18.98688 0.16 0.026 9.7 38.9 9.70944 0.18 0.046 17.8 40.3 17.79648 0.17 0.041 4.3 10.9 4.29024 0.48 0.129 57.4 46.4 57.46176 0.1 0.039 22.5 60.1 22.50144 0.06 0.01 1.2 12.5 1.2 0.14 0.022 5 23.7 5.00544 0.54 0.133 55.4 43.4 55.41312 0.08 0.037 9.5 26.7 9.48384 0.55 0.09 17.1 19.8 17.1072 0.23 0.059 22.9 40.4 22.88256 0.23 0.042 16.9 41.9 16.89408 0.16 0.04 6.5 16.9 6.4896 0.35 0.11 25.6 24.2 25.5552 sum check 5.58 1.395 369.3 778.4
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b. n = 24 d.f. = 22 By using 2 2 1 2 r n r t n - - = - we can find find t. Runoff Regression y = 0.2343x + 0.0036 R 2 = 0.7895 0 0.02 0.04 0.06 0.08 0.1 0.12 0.14 0 0.1 0.2 0.3 0.4 0.5 0.6 Rainfall (in.) Runoff (in.) t = 9.084 (calculated) T = 2.074 (chart) 9.084 > 2.074 so it is significant SS lb regression y = 53.642x + 2.9157 R 2 = 0.3131 0 10 20 30 40 50 60 70 0 0.1 0.2 0.3 0.4 0.5 0.6 Rainfall (in.) SS (lb) t = 3.167 (calculated) T= 2.074 (chart) 3.167 > 2.074 so it is significant
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SS lb/ac-in regression y = -43.714x + 42.597 R 2 = 0.0831 0 10 20 30 40 50 60 70 80 90 100 0 0.1 0.2 0.3 0.4 0.5 0.6 Rainfall (in.) SS (lb/ac-in.) t = 1.412 (calculated) T = 2.074 (chart) 1.412 < 2.074 so it is not significant c. It would also be good to include the elevation, temperature, and slope of the incline the rain was falling on because those factors also contribute to how much runoff is made.
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