The 1-hr unit hydrograph of a catchment is given in Table 4.1. Meteorological observations from a weather station inside the catchment area from 01-Jan-2020 to 07-Jan-2020 (one week) are used for this analysis. Rainfall hyetograph developed based on the observations on 01-Jan- 2020 (day 1) is shown in Figure 2. No rainfall was happened in any other days during this week. Other meteorological observations from the weather stations and some information of the reservoir and the catchment are as follows. It can be assumed that the weather is spatially uniform over the catchment and the reservoir. Use the given information to calculate: a) area of the catchment, b) inflow hydrograph from the catchment to the reservoir (assume no base flow) and c) the decay rate constant of Horton infiltration equation for the reservoir. Meteorological observations averaged over one week (from 01-Jan- to 07-Jan-2020) Mean daily air temperature averaged over one week = 50 °F Daily solar radiation averaged over one week = 450 cal/cm2 Dew point temperature = 35 °F Wind speed = 50 mi/day Reservoir details (from 01-Jan-2020 to 07-Jan-2020) Final infiltration capacity of Horton equation = 0.5 in/day Initial infiltration capacity of Horton equation = 2.5 in/day Averaged rate of the water out from the reservoir = 40 cfs for 10 hours every day. Initial water level of the reservoir = 0 ft Final water level of the reservoir at the end of 1-week period = 2 ft Reservoir area 60 ac (area is fairly uniform thorough out the reservoir depth) %3D Catchment details for the rainfall event Table 4.1: 1-hr unit hydrograph for the catchment o 1 2 Time 3 4 5 7 8 9 10 (hr) Flow rate 90 140 180 125 95 55 35 10 (cfs) 3.50 Phi index for the catchment = 1.0 in/hr 3.00 Neglect the initial abstraction 2.50 2.00 Catchment 1.50 1.00 Reservoir 0.50 0.00 0:00 1:00 2:00 3:00 4:00 Time (hr:min) Figure 1: Watershed Figure 2: Rainfall hyetograph from observations 20 Rainfall (in/hr)
The 1-hr unit hydrograph of a catchment is given in Table 4.1. Meteorological observations from a weather station inside the catchment area from 01-Jan-2020 to 07-Jan-2020 (one week) are used for this analysis. Rainfall hyetograph developed based on the observations on 01-Jan- 2020 (day 1) is shown in Figure 2. No rainfall was happened in any other days during this week. Other meteorological observations from the weather stations and some information of the reservoir and the catchment are as follows. It can be assumed that the weather is spatially uniform over the catchment and the reservoir. Use the given information to calculate: a) area of the catchment, b) inflow hydrograph from the catchment to the reservoir (assume no base flow) and c) the decay rate constant of Horton infiltration equation for the reservoir. Meteorological observations averaged over one week (from 01-Jan- to 07-Jan-2020) Mean daily air temperature averaged over one week = 50 °F Daily solar radiation averaged over one week = 450 cal/cm2 Dew point temperature = 35 °F Wind speed = 50 mi/day Reservoir details (from 01-Jan-2020 to 07-Jan-2020) Final infiltration capacity of Horton equation = 0.5 in/day Initial infiltration capacity of Horton equation = 2.5 in/day Averaged rate of the water out from the reservoir = 40 cfs for 10 hours every day. Initial water level of the reservoir = 0 ft Final water level of the reservoir at the end of 1-week period = 2 ft Reservoir area 60 ac (area is fairly uniform thorough out the reservoir depth) %3D Catchment details for the rainfall event Table 4.1: 1-hr unit hydrograph for the catchment o 1 2 Time 3 4 5 7 8 9 10 (hr) Flow rate 90 140 180 125 95 55 35 10 (cfs) 3.50 Phi index for the catchment = 1.0 in/hr 3.00 Neglect the initial abstraction 2.50 2.00 Catchment 1.50 1.00 Reservoir 0.50 0.00 0:00 1:00 2:00 3:00 4:00 Time (hr:min) Figure 1: Watershed Figure 2: Rainfall hyetograph from observations 20 Rainfall (in/hr)
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
Related questions
Question
Plase show all steps
Transcribed Image Text:The 1-hr unit hydrograph of a catchment is given in Table 4.1. Meteorological observations
from a weather station inside the catchment area from 01-Jan-2020 to 07-Jan-2020 (one week)
are used for this analysis. Rainfall hyetograph developed based on the observations on 01-Jan-
2020 (day 1) is shown in Figure 2. No rainfall was happened in any other days during this week.
Other meteorological observations from the weather stations and some information of the
reservoir and the catchment are as follows. It can be assumed that the weather is spatially
uniform over the catchment and the reservoir. Use the given information to calculate:
a) area of the catchment,
b) inflow hydrograph from the catchment to the reservoir (assume no base flow) and
c) the decay rate constant of Horton infiltration equation for the reservoir.
Meteorological observations averaged over one week (from 01-Jan-
to 07-Jan-2020)
Mean daily air temperature averaged over one week = 50 °F
Daily solar radiation averaged over one week = 450 cal/cm2
Dew point temperature = 35 °F
Wind speed = 50 mi/day
Reservoir details (from 01-Jan-2020 to 07-Jan-2020)
Final infiltration capacity of Horton equation = 0.5 in/day
Initial infiltration capacity of Horton equation = 2.5 in/day
Averaged rate of the water out from the reservoir = 40 cfs for 10 hours every day.
Initial water level of the reservoir = 0 ft
Final water level of the reservoir at the end of 1-week period = 2 ft
Reservoir area 60 ac (area is fairly uniform thorough out the reservoir depth)
%3D
Catchment details for the rainfall event
Table 4.1: 1-hr unit hydrograph for the catchment
o 1 2
Time
3
4
5
7
8
9
10
(hr)
Flow rate
90
140
180
125
95
55
35
10
(cfs)
3.50
Phi index for the catchment = 1.0 in/hr
3.00
Neglect the initial abstraction
2.50
2.00
Catchment
1.50
1.00
Reservoir
0.50
0.00
0:00
1:00
2:00
3:00
4:00
Time (hr:min)
Figure 1: Watershed
Figure 2: Rainfall hyetograph from observations
20
Rainfall (in/hr)
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 5 steps with 4 images
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