Stormwater Exam 1 ACTUAL UPDATED QUESTIONS AND CORRECT ANSWERS
What process in the water cycle produces precipitation? Condensation
Which process moves the moisture upward in the water transpiration
cycle?
What drives the design of urban storm drainage Rain
structures?
What is precipitation? any product of the condensation of atmospheric water vapor that falls under
gravitational pull from
What are forms of precipitation? -drizzle
-snow
-rain
Which one is the main difference between drizzle and Droplet size
rain?
, What are the measurable parameters of rainfall? Depth, intensity, duration
What are the two types of hyetographs? -incremental
-cumulative
What do we use incremental hyetographs for? to find the time of the peak
What do we use cumulative hyetographs for? Used to find the total rainfall
*steep slopes indicate peak rainfall intensity
What does a hyetograph show you? Shows rainfall intensity (variability) over time
What does a hydrograph show you? Shows discharge over time
What is a random event? -something that has NOT happened yet, future event
-unpredictable, do not have the results
What can a time series plot tell us? What can we not -shows variability of rainfall depth over time
directly read from time-series plots? -shows minimum and maximum rainfall depth
-cannot get the average rainfall depth
How many years of data did Hattori have? 20
What is used to determine the exceedance probability of Plotting Position Formulas
an event and get the Cumulative Distribution Function
(CDF) for a set of samples?
What is the basis for choosing a Theoretical Probability Goodness-of-Fit to the samples
Distribution?
IDF curves are developed based on ... Historical Rainfall Data
In the "Continuous simulation" approach, the frequency Runoff data, concerned about flood risk
analysis is done on what?
What is the runoff equal to? Runoff = Total Rainfall Depth - Abstractions
What process in the water cycle produces precipitation? Condensation
Which process moves the moisture upward in the water transpiration
cycle?
What drives the design of urban storm drainage Rain
structures?
What is precipitation? any product of the condensation of atmospheric water vapor that falls under
gravitational pull from
What are forms of precipitation? -drizzle
-snow
-rain
Which one is the main difference between drizzle and Droplet size
rain?
, What are the measurable parameters of rainfall? Depth, intensity, duration
What are the two types of hyetographs? -incremental
-cumulative
What do we use incremental hyetographs for? to find the time of the peak
What do we use cumulative hyetographs for? Used to find the total rainfall
*steep slopes indicate peak rainfall intensity
What does a hyetograph show you? Shows rainfall intensity (variability) over time
What does a hydrograph show you? Shows discharge over time
What is a random event? -something that has NOT happened yet, future event
-unpredictable, do not have the results
What can a time series plot tell us? What can we not -shows variability of rainfall depth over time
directly read from time-series plots? -shows minimum and maximum rainfall depth
-cannot get the average rainfall depth
How many years of data did Hattori have? 20
What is used to determine the exceedance probability of Plotting Position Formulas
an event and get the Cumulative Distribution Function
(CDF) for a set of samples?
What is the basis for choosing a Theoretical Probability Goodness-of-Fit to the samples
Distribution?
IDF curves are developed based on ... Historical Rainfall Data
In the "Continuous simulation" approach, the frequency Runoff data, concerned about flood risk
analysis is done on what?
What is the runoff equal to? Runoff = Total Rainfall Depth - Abstractions
