How would you go about deriving a UH from a catchment for which data (catchment area, rainfall and discharge values) are available? Derive a hyetograph from the incident rainfall (losses do not need to be considered to derive a UH); Determine the UH using the formula "Ui = Qi/P" (for a single interval hyetograph) or using "deconvolution" (for a multiple interval hyetograph). Estimate direct runoff hydrograph by subtracting baseflow from observed stream flow data; Estimate the total runoff volume and the direct runoff depth over the catchment; Determine the UH ordinates using the formula "Unit hydrograph = Direct runoff hydrograph x 1/Direct runoff depth"; Estimate catchment losses and subtract these from the incident precipitation to obtain excess rainfall; the duration of the excess rainfall is used as the duration of the UH. Determine the precipitation volume for each time interval; Use UH superposition and proportionality principles to derive a direct unit hydrograph; Estimate losses and baseflow; Add losses and baseflow to the direct unit hydrograph to obtain the final UH. Calculate total precipitation and discharge volumes for each time interval; Obtain excess rainfall volume for each time interval by subtracting losses from the total precipitation values; Divide excess rainfall volume by discharge volume to obtain an "adjustment factor" (runoff to rainfall ratio) in each time interval; Multiply the adjustment factors by the direct runoff hydrograph to obtain the UH. Estimate surface runoff by using the rational formula; Determine the UH using the formula "Ui = Qi/P" (for a single interval excess rainfall) or using "deconvolution" (for a multiple interval excess rainfall).
How would you go about deriving a UH from a catchment for which data (catchment area, rainfall and discharge values) are available? Derive a hyetograph from the incident rainfall (losses do not need to be considered to derive a UH); Determine the UH using the formula "Ui = Qi/P" (for a single interval hyetograph) or using "deconvolution" (for a multiple interval hyetograph). Estimate direct runoff hydrograph by subtracting baseflow from observed stream flow data; Estimate the total runoff volume and the direct runoff depth over the catchment; Determine the UH ordinates using the formula "Unit hydrograph = Direct runoff hydrograph x 1/Direct runoff depth"; Estimate catchment losses and subtract these from the incident precipitation to obtain excess rainfall; the duration of the excess rainfall is used as the duration of the UH. Determine the precipitation volume for each time interval; Use UH superposition and proportionality principles to derive a direct unit hydrograph; Estimate losses and baseflow; Add losses and baseflow to the direct unit hydrograph to obtain the final UH. Calculate total precipitation and discharge volumes for each time interval; Obtain excess rainfall volume for each time interval by subtracting losses from the total precipitation values; Divide excess rainfall volume by discharge volume to obtain an "adjustment factor" (runoff to rainfall ratio) in each time interval; Multiply the adjustment factors by the direct runoff hydrograph to obtain the UH. Estimate surface runoff by using the rational formula; Determine the UH using the formula "Ui = Qi/P" (for a single interval excess rainfall) or using "deconvolution" (for a multiple interval excess rainfall).
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
Related questions
Question
Transcribed Image Text:How would you go about deriving a UH from a catchment for which data (catchment area, rainfall
and discharge values) are available?
Derive a hyetograph from the incident rainfall (losses do not need to be considered to derive a UH);
Determine the UH using the formula "Ui = Qi/P" (for a single interval hyetograph) or using "deconvolution"
(for a multiple interval hyetograph).
Estimate direct runoff hydrograph by subtracting baseflow from observed stream flow data; Estimate the
total runoff volume and the direct runoff depth over the catchment; Determine the UH ordinates using the
formula "Unit hydrograph = Direct runoff hydrograph x 1/Direct runoff depth"; Estimate catchment losses
and subtract these from the incident precipitation to obtain excess rainfall; the duration of the excess rainfall
is used as the duration of the UH.
Determine the precipitation volume for each time interval; Use UH superposition and proportionality
principles to derive a direct unit hydrograph; Estimate losses and baseflow; Add losses and baseflow to the
direct unit hydrograph to obtain the final UH.
Calculate total precipitation and discharge volumes for each time interval; Obtain excess rainfall volume for
each time interval by subtracting losses from the total precipitation values; Divide excess rainfall volume by
discharge volume to obtain an "adjustment factor" (runoff to rainfall ratio) in each time interval; Multiply the
adjustment factors by the direct runoff hydrograph to obtain the UH.
Estimate surface runoff by using the rational formula; Determine the UH using the formula "Ui = Qi/P" (for a
single interval excess rainfall) or using "deconvolution" (for a multiple interval excess rainfall).
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 3 steps
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Recommended textbooks for you
Structural Analysis (10th Edition)
Civil Engineering
ISBN:
9780134610672
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Principles of Foundation Engineering (MindTap Cou…
Civil Engineering
ISBN:
9781337705028
Author:
Braja M. Das, Nagaratnam Sivakugan
Publisher:
Cengage Learning
Structural Analysis (10th Edition)
Civil Engineering
ISBN:
9780134610672
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Principles of Foundation Engineering (MindTap Cou…
Civil Engineering
ISBN:
9781337705028
Author:
Braja M. Das, Nagaratnam Sivakugan
Publisher:
Cengage Learning
Fundamentals of Structural Analysis
Civil Engineering
ISBN:
9780073398006
Author:
Kenneth M. Leet Emeritus, Chia-Ming Uang, Joel Lanning
Publisher:
McGraw-Hill Education
Traffic and Highway Engineering
Civil Engineering
ISBN:
9781305156241
Author:
Garber, Nicholas J.
Publisher:
Cengage Learning