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17 The time of concentration (Tc) for a watershed with the following characteristics, based on...
Develop the 15-min Clark unit hydro graph for a 2.17 mi2 (1389 acre) urban watershed that...
Develop the 15-min Clark unit hydro graph for a 2.17 mi2 (1389 acre) urban watershed that has a flow path of 1.85 mi, a slope of 30.5 ft/mi, and an imperviousness of 21 percent. A rainfall intensity of 2.56 in/hr is to be used. The time of concentration for the watershed is computed using Tc = 11.4 L0.50 Kb0.52 S-0.31 i -0.38 where Tc is the time of concentration in hours, L is the length of the longest flow path...
USING KIRPICH METHOD IN DETERMINING TIME OF CONCENTRATION: L 1.15 tc 51H0.385 Where: . L S...
USING KIRPICH METHOD IN DETERMINING TIME OF CONCENTRATION: L 1.15 tc 51H0.385 Where: . L S H Time of concentration (minutes) Length of watercourse (m) Average basin slope (S=HL) Difference in elevation (m) i = 5.41270.1614 (10)(1+0.56)0.936 where: i = rainfall intensity(mm/h) T = Return period (years) D = rainfall duration, tc (hours) Storm water quantity can be estimated by this method. Q=C.I.A / 360 Where, Q = quantity of storm water, m3/sec C= coefficient of runoff I = intensity...
Determine the time of concentration for overland flow on a small watershed in the southeast. The...
Determine the time of concentration for overland flow on a small watershed in the southeast. The watershed is characterized by timberland with deep forest litter. The hydraulic length of the overland flow is 280 m and the elevation change is 20 m. What is the watershed time of concentration?
4. Rational Method (20 points): A nonhomogencous watershed has the following distribution of landcover: Land Runoff...
4. Rational Method (20 points): A nonhomogencous watershed has the following distribution of landcover: Land Runoff Area ID A Forest B Urban C Lawns with sandy soil D Parking lot Landcover Coefficient (C) (m) Slope t (min.) 35 14 0.20 0.85 0.15 0.80 28.000 400 9,000 32.000| 5% | Unknown 11,000| 1% 2% 12 a. (5) Estimate the time of concentration (te) for the land area labeled "C" (lawns with sandy soil) using the FAA formula. Overland flow distance for...
determine the peak flow at point C using the Rational Method. The time of concentration should be calculated using ASCE...
determine the peak flow at point C using the Rational Method. The time of concentration should be calculated using ASCE Kinematic Wave equation. 1) A storm drain system is shown in the figure below. For the flow conditions indicated, IDF equation 110 tc + 16 Where: i- intensity [in h ; tc-time of concentration [min] 0.94 L0.6 no.6 Where: L=length of overland flow (ft); n= Manning's roughness coefficient (0.016); i= rainfall intensity (mm hr-) and S-average overland flow slope (ft...
Time of concentration Determine the time of concentration (te) for an overland flow length of 200...
Time of concentration Determine the time of concentration (te) for an overland flow length of 200 ft on an area in Colorado Springs, CO, with a Manning's roughness coefficient of 0.10, for a design frequency of 25 years. The rainfall intensity-duration relationship for a 25-year frequency is as given in Table 1. Take the average slope of the area as 0.005 ft/ft. Recall that the time of concentration for inlets is given by: where time of concentration (in seconds) 1-overland...
For a 1st order reaction the logarithm of concentration is linear to time. The linear equation...
For a 1st order reaction the logarithm of concentration is linear to time. The linear equation of the following curve is lnC = lnC0 – 0.2t; where C is the molar concentration (M) of a reactant, C0 is the molar concentration at time t = 0 (the starting concentration or the initial concentration), and in this particular case C0 = 10 M; and t is time in seconds. What is the slope (and the unit) of the curve? What will...
(25 pts) Solve for the time-dependent concentration of ammonium chloride based on the following reaction equation....
(25 pts) Solve for the time-dependent concentration of ammonium chloride based on the following reaction equation. Assume that the reaction rate constants and the concentrations of ammonia and hydrogen chloride are constant. Assume an initial concentration of ammonium chloride of 0.5mM. Be sure to solve for the constants. NH3+HCl NH4CI Reaction: a. (5 pts) Write the reaction rate equation for NH2C b. (5 pts) Write the differential equation in our standard form (+A -y = B) dx c. (5 pts)...
In a study of the decomposition of nitrosyl bromide at 10 °C NOBr—+NO+ Br2 the concentration...
In a study of the decomposition of nitrosyl bromide at 10 °C NOBr—+NO+ Br2 the concentration of NOBr was followed as a function of time. It was found that a graph of 1/[NOBr] versus time in seconds gave a straight line with a slope of 1.27 m?s and a y-intercept of 3.98 M? Based on this plot, the reaction is order in NOBr and the rate constant for the reaction is M?? In a study of the decomposition of hydrogen...
the following concentration-time data were collected: Time (min)(min) [X](M)[X](M) 0 0.467 1 0.267 2 0.187 3...
the following concentration-time data were collected: Time (min)(min) [X](M)[X](M) 0 0.467 1 0.267 2 0.187 3 0.144 4 0.117 5 0.099 6 0.085 7 0.075 Given that the rate constant for the decomposition of hypothetical compound XX from part A is 1.60 M−1⋅min−1M−1⋅min−1, calculate the concentration of XX after 15.0 minmin . Express your answer with the appropriate units.
USING KIRPICH METHOD IN DETERMINING TIME OF CONCENTRATION: L 1.15 tc 51H0.385 Where: . L S H Time of concentration (minutes) Length of watercourse (m) Average basin slope (S=HL) Difference in elevation (m) i = 5.41270.1614 (10)(1+0.56)0.936 where: i = rainfall intensity(mm/h) T = Return period (years) D = rainfall duration, tc (hours) Storm water quantity can be estimated by this method. Q=C.I.A / 360 Where, Q = quantity of storm water, m3/sec C= coefficient of runoff I = intensity...
4. Rational Method (20 points): A nonhomogencous watershed has the following distribution of landcover: Land Runoff Area ID A Forest B Urban C Lawns with sandy soil D Parking lot Landcover Coefficient (C) (m) Slope t (min.) 35 14 0.20 0.85 0.15 0.80 28.000 400 9,000 32.000| 5% | Unknown 11,000| 1% 2% 12 a. (5) Estimate the time of concentration (te) for the land area labeled "C" (lawns with sandy soil) using the FAA formula. Overland flow distance for...
determine the peak flow at point C using the Rational Method. The time of concentration should be calculated using ASCE Kinematic Wave equation. 1) A storm drain system is shown in the figure below. For the flow conditions indicated, IDF equation 110 tc + 16 Where: i- intensity [in h ; tc-time of concentration [min] 0.94 L0.6 no.6 Where: L=length of overland flow (ft); n= Manning's roughness coefficient (0.016); i= rainfall intensity (mm hr-) and S-average overland flow slope (ft...
Time of concentration Determine the time of concentration (te) for an overland flow length of 200 ft on an area in Colorado Springs, CO, with a Manning's roughness coefficient of 0.10, for a design frequency of 25 years. The rainfall intensity-duration relationship for a 25-year frequency is as given in Table 1. Take the average slope of the area as 0.005 ft/ft. Recall that the time of concentration for inlets is given by: where time of concentration (in seconds) 1-overland...
(25 pts) Solve for the time-dependent concentration of ammonium chloride based on the following reaction equation. Assume that the reaction rate constants and the concentrations of ammonia and hydrogen chloride are constant. Assume an initial concentration of ammonium chloride of 0.5mM. Be sure to solve for the constants. NH3+HCl NH4CI Reaction: a. (5 pts) Write the reaction rate equation for NH2C b. (5 pts) Write the differential equation in our standard form (+A -y = B) dx c. (5 pts)...
In a study of the decomposition of nitrosyl bromide at 10 °C NOBr—+NO+ Br2 the concentration of NOBr was followed as a function of time. It was found that a graph of 1/[NOBr] versus time in seconds gave a straight line with a slope of 1.27 m?s and a y-intercept of 3.98 M? Based on this plot, the reaction is order in NOBr and the rate constant for the reaction is M?? In a study of the decomposition of hydrogen...
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