Explain the design procedure for sanitary and storm sewer? According to your observationwhich type of sewer system is more effective?A catchment is having total area of 60 hectares. The rainfall intensity relation with durationii.for this catchment is given by the relation I=100/(t+20),Where I is in cm/h and t is durationof rain in min.a) What will be the storm water runoff from this catchment if the average imperviousnessfactor is 0.64, and time of concentration is 35 min? b) If population density of the area is 350 persons per hectare and water consumption is180 LPCD, what will be the design discharge for separate system and combinedsystem?

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Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question 8. [2 Points] Create a 60-minute hydrograph for a 10-acre flat lawn covered with yellow bluestem grass on clayey loam soil and the time of concentration = 20 minutes. A 10-year storm frequency is to be considered. Calculate the volume of the storm runoff.
Determine the spacing of sewer inlets. Inlets run down the center of a street. The extend of the catchment is 124 ft from the centerline of the pipe. The rainfall intensity is 2.2 in/hour and C = 0.74. Pipes carry 0.7 cfs.
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).
A catchment has the Horton infiltration parameters: fo= 150 mm/h, fc = 50 mm/h, and k = 3 min¹. The design storm is given below. Estimate the time when ponding begins. Interval (min) Average rainfall (mm/hr) 20 40 80 170 90 20 0-10 10-20 20-30 30-40 40-50 50-60
Suppose the parameters for Philip's equation are sorptivity, S = 15 cm/hr!/2 and K= 5cm/hr. A uniform rainfall causes ponding after 20 minutes. Determine the infiltration rate at time t=1 hr. Also compute the cumulative infiltration for the first hour of the rain.
10-1. Design a slow sand filter system for a community which has a projected popula- tion of 3000 and an average per capita usage of 300 L/day. Use the Goodrich formula of Chap. 2 to estimate the peak flow rates, and size the system so it can produce water at the maximum weekly rate with one unit out of service. The design filtration rate is 6 m/day.
Please provide an explanation for evry formula and solution. And be clear with your answer. In 1997, Upper Grand watershed near Maputi, Bukidnon with an area of 4350 sq.km received 77.7 cm of precipitation. The average rate of flow measured in the Grand River, which drained the watershed, was 39.6 cu.m/s. Infiltration was estimated to occur at an average rate of 9.2 x 10-7 cm/s. Evapotranspiration was estimated to be 45 cm/yr. What is the change in storage in the watershed in cm/yr. Also, calculate the runoff coefficient for this watershed.
The infiltration rate f in a basin under ponding condition is given by f= 30 + 10e 2t where, f is in mm/h and t is time in hour. Total depth of infiltration (in mm, up to one decimal place) during the last 20 minutes of a storm of 30 minutes duration is
A drainage basin has a area of 7322 km2. The average annual precipitation for this area is 909 mm. The average surface water flow at the outlet of the catchment is 21.4 x 108 m3/year and the average groundwater flow out of the basin is 94.6 mm/year. Assume trailing zeros are significant if present. Determine the annual average evaporation in mm/year. (give your answer to one decimal place)
A reservoir had a water surface elevation of 110 m above the datum at the beginning of the month. In the same month, the reservoir received an average inflow of 7.5 cms (m3/s) from surface runoff sources. For the same period, the outflow from the reservoir had an average value of 5 cms. Further, in the same month, the reservoir received a rainfall of 180 mm and losses due to evaporation of 5 cm. Assume the area of the lake is 50 km2 acres and assume no contribution from groundwater storage. What is the water surface elevation of the reservoir after the month?
Determine the required area (in ft ) of a bioretention basin to service runoff from a shopping complex with 4 .2 acres of paved parking, 1.1 acre of sidewalks, 0.5 acre of landscaping. The 24-hr design storm is 1 inch. Use the empirical coefficients in Small Storm Hydrology method. There is no underdrain pipe for the bioretention basin. Use the following guidelines for the design: Ponding depth = 12 inch Media bed: 36 inches deep, porosity = 0.30 Gravel bed: 24 inches deep, porosity = 0.36
For the following rainfall rate, find the net runoff in cm, total rainfall and the value of W-index. Take Ø-index = 3. Time (min) 10 20 30 40 50 60 70 Rain rate (cm/hr) 2.5 2.5 10 7.5 1.25 1.25 5

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