Discuss why Rational Method should not be used for large catchments in estimating peak runoff? Give reasons to support your response.
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Discuss why Rational Method should not be used for large catchments in estimating peak runoff? Give reasons to support your response.
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- What is meant by 75% dependable yield of a catchment? Indicate a procedure to estimate the same by using annual runoff volume time series.What is a flow-duration curve? What information can v=be gathered from a study of flow-duration curve of a stream at a site? List the factors affecting the seasonal and annual runoff (yield) of a catchment. Describe the listed factors.Determine the following:What is Rainfall-Run off Relation?Definition of HydrographWhat is a Hydrograph Separation?What is a Unit Hydrograph?Estimation of Discharge using HydrographWhat is Rational Formula and SCS Curve?Please type it in here instead of writing it on a piece of paper
- A reservoir is to be constructed with the following characteristics: Mean Annual Runoff, MAR =50mm Catchment Area = 286km2 Coefficient of Variation CV= 110% Full Supply Capacity FSC = 8x 106m3 What is the probability that the reservoir will fill to full capacity from empty in one year assuming that the runoff data follows the Weibull distribution function? P(X-x) = 1-e^(aX/x)bFor the relation between direct runoff and time? A- It starts and end with base flow. B- It starts before base flow and ends after. C- it It starts and end with direct runoff. D- It starts before base flow and ends with it. What is the correct answer??A 50-ha catchment has the following time-area relationship. Estimate the runoff hydrograph (cfs) using the time-area method for a 30-min rainfall hyetograph given.
- Assuming that you have gaged rainfall and streamflow data for a given basin: (a) Illustrate and name one baseflow separation method, and explain why the streamflow hydrograph has an initial recession, which defines the beginning of direct runoff. (b) Illustrate and name one infiltration separation method, and explain the assumptions for the application of the method including calibration of the infiltration parameters.Rainfall intensity of a rural catchment is 50 mm/hr. The percentage contributions of catchment relief, catchment storage and ground characteristics in the calculation of runoff coefficient are 0, 5 and 30 respectively. What is the value of the S0-year ARI runoff coefficient (C) of this catchment? Write your answer correct to two decimal place.Calculate the runoff from a watershed of (0.01 x 4737) ha. The following data are available: Depth of rainfall is 100 mm. Antecedent rainfall condition, AMC 1: Row crop, good condition in 40 ha (Soil group C) Woodland, good condition in 20 ha (Soil group B) The day after the rainfall of 100 mm, another rainfall of 50 mm occurred. Solve for the surface runoff from the watershed. [ NOTE: Where R is the last four digits of your Registration Number. R = 4737 ]
- Please help, the area runoff coefficient and inlet time for each sub catchment shown in the table.Illustrate the Difference between event based rainfall runoff modelling and continuous rainfall runoff modelling?During a flood in a catchment, when all streams are filled with water, the runoff value is ? A- at the rising limb of the hydrograph. B- at the falling limb of the hydrograph. C- at the falling limb of the hydrograph. D- at the second base flow recession part. What is the correct answer??