Answered: Time 1 123 4 5 6 7 8 9 10 11 12 Runoff…

Time 1 123 4 5 6 7 8 9 10 11 12 Runoff (cfs) 130 170 300 600 696 727 602 512 315 210 90 60 Base flow (cfs) 130 130 130 130 130 130 130 130 130 110 90 60

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Related questions

Q: Question 2 Compute the total volume of rainfall (acre-ft) for each of the storms and watersheds: (a)…

A: Given data Depth of rainfall=3 in Drainage area= 0.25mi2 Rainfall intensity= 0.6in/hr Duration =…

Q: 10. Two storms, each of 4-hr duration and having rainfall excess of 3.0 and 2.0 cm, respectively,…

A: ##Resultanting Direct Runoff Hydrograbh for First and Second Period of time ###

Q: You have been given a 1-hour unit hydrograph (1 unit = 1 cm) and have been asked to use it to derive…

Q: The daily streamflow data for Fall River, Massachusetts at a site having a drainage area of 650 km2…

A: Drainage area, The time and flow rate is tabulated below.Time (days)Flow (m3/s)Time (days)Flow…

Q: Question 3 A unit hydrograph for a watershed is triangular in shape with base period of 20 hours.…

A: Base period -T=20 hrsarea -A=500 ha=500×104 m2

Q: 3. A 5-acre apartment complex receives 1.25 in./hr. of rain for 6 hours. During the storm event, 0.1…

A: Given data Total area (A) = 5 acre Rainfall intensity (p) = 1.25 in./hr Duration of rainfall (t)…

Q: Initial abstraction la a) The area contributing direct run off to a stream b)The degree of vetness…

A: For the first question, the correct option is:Initial abstraction la isb) The degree of wetness of a…

Q: a. Derive a 2-hour Unit Hydrograph for a Watershed Area of 2600 acres. The total 2 hour rainfall was…

A: Watershed area = 2600 acres2 hr rainfall = 6 inrunoff for first two hours = 0.8 in = 2.032…

Q: O. Determine the mean runoff flow in cfs from a drainage area of 175 acres using the English…

A: Inglis formula is a empirical formula Where A is area in km^2 Q discharge in m^3/sec

Q: Q. Rainfall of intensity 20mm/h occurred over a watershed of area 1km² for duration of six hours. It…

A: Given Rainfall intensity I=20 mm/hArea A=1 km2duration t=6 hrsdirect runoff R=30,000 m3

Q: The period of runoff for a 1-hour UH is given as T. The resulting period of runoff for a 2-hour UH…

A: T+1 To obtain 2hr Unit hydrograph 1hr uni hydrograph is added by delaying it by 1 hour

Q: If the following runoff is created by 5 hours of rainfall with a depth of 30 cm. What is the…

A: Rainfall Depth = 30 cm Duration of rainfall = 5 hours

Q: ff. The ordinates of is storm When divided by 6 giv hydrograph. When divided by 3 giv hydrograph.

Q: Using the total storm rainfall depths given, determine the average rainfall over the watershed using…

Q: a. Using the rainfall data provided in Table 1, the two-hour unit hydrograph given in Table 2, a…

A: The rainfall data are provided in the table 1 and two hour UH is given in the table 2 we need to…

Q: Problem: A catchment has four sub-areas. The annual precipitation and evap the sub-areas are given…

Q: The total rainfall in a catchment of area 1000 km², during a 6 h storm, is 19 cm. The surface runoff…

A: Given that :- Surface runoff = 1×108 m3 Catchment area = 1000 km2 Storm duration = 6 hr To find the…

Q: A 100-acre watershed that is 80% Industrial and 20% newly graded areas (no vegetation). The…

Q: For the given rainfall data, compute the runoff volume if the index is 0.9 in/hr. The watershed area…

A: φ index = 0.9 in/hrWatershed area = 0.785 mi² T(hr) rainfall intensity (in/hr) 0- 3…

Q: Question 2. A 4-hour UH (GH) has the values shown below. Determine the runoff from a design downpour…

A: A 4-hour UHNet precipitation for the first 2 hours: 20 mm/hrNet precipitation for the next 2 hours:…

Q: 1. Determine the direct runoff hydrograph by separating the baseflow. 2. Derive the unit hydrograph…

A: 1- Determination of Direct Runoff hydrograbh and UNIT hydrograbh ###

Q: A watershed has an area of 3.9 acres, a runoff coefficient of 0.66 and an inlet time of 12.2…

A: Area of watershed, A = 3.9 acres Runoff coefficient, C = 0.66 Inlet time, Td =12.2 min Intensity,…

Q: Question1: (a) Given a rainfall duration of 1-hour and an effective precipitation of 1.5 cm and the…

A: Given: Excess precipitation = 1.5 cm Required: 1 hour unit hydrograph And resulting hydrograph from…

Q: Q2. Direct runoff hydrograph and catchment area The outflow hydrograph from the storm in Q1 is as…

A: Data is as given below

Q: Determine the direct runoff, the 0-index, and the excess rainfall Set hyetograph for the storm given…

Q: 2) Compute the peak runoff, qp, using the NRCS Methbd for a 100 year storm for a drainage basin…

A: Curve Number= 68 Time of concentration= 2.35 hr

Q: The hydrograph tabulated below is for a river that drains an area of 810 mi?. Plot nydrograph,…

A: Hydrograph is the graph between discharge (y axis) and to duration (x axis) In above problem ,…

Q: peak 435.6 flow flow 2 hr For the given 1 hour unit hydrograph and watershed Find a) Qpeak b) the…

Q: a drainage basin with the following characteristics: Drainage Area is 125 acres Short grassy…

A: Applying snyder Mathode and using appropriate values of constand

Q: Problem 3. A 50-ha catchment has the following time-area relationship. Estimate the runoff…

Q: A small catchment basin with an area of 1.93 square miles received a rainfall of 105 mm in 90…

Q: A catchment has a drainage area of 0.025 km², a runoff coefficient of 0.6, an inlet time of 20…

A: This question is from Hydrology.

Q: The following table gives the measured rainfall and surface runoff from a 65-acre watershed. Values…

A: Given:- The measured rainfall and surface runoff values are given The cross-sectional area of the…

Q: Questions (3.2) Determine using the 'rational formula' with runoff co-efficient equal to 0.80, the…

Q: 10-min unit hydrograph for a catchment is given in Table 1 below. Table 1: 10-min Unit Hydrograph…

A: Given Data is of a Unit hydrograph. Time has been given in minutes Discharge is given in m3/s…

Q: a) Determine the unit hydrograph for Gilmore Creek from the observed runoff (note: the area of the…

A: Solution For finding the unit hydrograph first find the Direct runoff hydrograph(DRH). For DRH,…

Q: A gage on a small (0.75-acre) urban parking lot recorded the following incremental rainfall data.…

Q: Consider a watershed with a drainage area of 10 square miles and a mainstream length of 7.5 miles.…

Q: The stream flow data for a basin with an area of 3500 km2 are given in the table 1, a. Separate the…

A: Area, A=3500 basin area NO. Accumulative time Total flow m3/s 1 8.00 Pm 16 2 9.00 Pm 15 3…

Q: Estimate the amount of rain storage (in inches) in a 6-acre parking lot using the following rainfall…

Q: Runoff data have been collected for a 4-hour storm over a 120 acre watershed as indicated in the…

A: Given Area = 120 acre Phi- index = 0.1 in /hr

Q: 1-hour Unit Hydro Index is 2 cm BELOW for all types of calculations you need to do. 1 (UH) is given…

A: Solution Given Data ϕ index= 2 cm/sBaseflow= 2 m3/s Storm Data Time 1 hour 2 hour 3 hour…

Concept explainers

British Gravitational Bg System Of Units

Measuring is the comparison of a particular physical quantity with its reference value. A unit is a fixed physical quantity. The length is a physical quantity. A physical quantity is the product of a unit and the numerical value we need to compare with. 

Question

Using the total direct runoff hydrograph given, derive a 2 hour unit hydrograph for the 2,850 acre drainage area. The rainfall duration was 2 hours and the total precipitation was 6 inches.

Time
1
234
5
6
7
8
9
10
11
12
Runoff (cfs)
130
170
300
600
696
727
602
512
315
210
90
60
Base flow (cfs)
130
130
130
130
130
130
130
130
130
110
90
60

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1: Calculation of 2 hrs UH

VIEW

Step 2: calculation of rainfall excess

VIEW

Solution

VIEW

Step by step

Solved in 3 steps with 4 images

SEE SOLUTION Check out a sample Q&A here

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.

Similar questions

Based on 14 days runoff data given in TABLE Q3(c), determine the unit hydrograph for the catchment if the area is 4500 km². Separate the baseflow by using appropriate method.
Question 03 In a given year, a catchment with an area of 9536 km? received 1.3 m of precipitation. The average rate of flow measured in a river draining the catchment was 30 m³s1. a. How much total river runoff occurred in the year (in m³)? b. What is the runoff coefficient? c. How much water is lost due to the combined effects of evaporation, transpiration, and infiltration. (Express in m).
The surface runoff hydrograph after the base flow separation is called: * None of the these Direct Runoff Hydrograph (DRH) Base Flow (BF) Discharge (Q) Unit Hydrograph (UH) The total rainfall in a catchment of area 1200 Km2 during a 6-hr storm is 16 cm. The surface runoff is 1.2 *10^8 m3. The infiltration index is: * 1.2 cm/hr 0.1 cm/hr 1 cm/hr cannot be estimated with the given data 0.2 cm/hr
Net Storm Rainfall Example 2-1 Rain falls as shown in the rainfall hyetograph (intensity Vs. time) in Fig. E2-1 (a). The o index for the Storm is 0.5 in./hr and is constant over 5 hr. Plot the net rainfall on the hydrograph (flow vs. time) given in Fig. E2-1 (a). Determine the total volume of runoff and the watershed area. 1cfs = 1.008 ac-in/hr 2.0 1.5 1.0 0.5 1 3. 4 Time (hr) 700 600 500 400 300 200 100 4 8 12 16 20 24 Time (hr) Time (hr) Q (cfs) Volume (cfs-hr) 0-2 2-4 4-6 6-8 8-10 10-12 12-14 14-16 16-18 18-20 20-22 22-24 24-26 16 Q (cfs) iT (in./hr)
A 6-hours storm had 4 cm of rainfall and the resulting runoff was 2cm. If index remains at the same value, the runoff due to 10 cm of rainfall in 12 hours in the catchment is?
The ordinates of a 6h-UH of a watershed having a drainage area of 393 km^2 are given below. For a storm over the watershed having excess rainfall of 5 cm for the first six hours and 15 cm for the second six hours, compute the direct runoff hydrograph ordinates and plot the hydrograph. Compute the depth of direct runoff in cm. Assuming constant baseflow of 100 m^3/s, compute the storm hydrograph ordinates and plot the hydrograph. (List all the DRH ordinates in order, separated by a single space.)
Show full solution.According to rainfall data collected by a laboratory during storm events, the precipitation level in inches (X) varies jointly with runoff in cubic feet per second (Y). The joint probability mass function (PMF) of both variables are given by the following Table: Y 1 2 3 10 0.05 0.15 0 20 0.1 0.25 0.25 30 0 0.1 0.1 a. Determine and plot the marginal PMF of runoff.b. Determine the correlation coefficient between X and Y.
2 %V9 li. 3 (9 This question requires one response per row The base flow for this direct runoff hydrograph is: 0 4 8h o Index = 0.135 cm/h Rainfall excess = 5.52 cm 30 25 20 15 Direct runoff 5.52 cm 10 A Base flow -6 0 12 18 24 30 36 42 48 54 60 66 Time in hours -6 8 5.52 48 Discharge (m/s) 3.26 cm 2.26cm
1. A 160-acre drainage basin has the following characteristics: Land Use Residential, flat, 60% impervious Residential, flat, 30% impervious Concrete or sheet asphalt pavement Turf Meadows Forested Area * for a range of values, the runoff coefficient can be calculated as an average value. Rainfall Intensity (in/hr) Find the peak runoff from the drainage area for a 20-minute duration storm with a return frequency of 25-years? 20 18 16 14 2 0 0 Frequency (years) 100 50 25 10 10 Area % 20 30 5 25 20 20 30 Duration (min) Coefficient (C)* 0.55 0.40 0.85 0.25 0.2 40 50 60
Example Problem 1: Runoff Calculation Using the Curve Number Method I Scenario: A 500-acre watershed is undergoing urban development. 300 acres are being converted from forest (CN=30) to a residential area with 65% impervious cover (CN=77). Calculate the change in runoff for a 2-inch rainfall event.