Why is it important to keep excess runoff from rain from overloading sewer plants?

What is the maximum population that can be served by an 8-in. sanitary sewer laid at minimum grade using a design flow of 400 gpcd (gallon per capita per day) and a flowing-full velocity of 2.0 ft/sec? (b) Compute the diameter of a storm drain to serve the same population based on population density = 30 persons per acre, coefficient of runoff = 0.40, 10-year rainfall frequency curve, a duration (time of concentration) = 20 min, and a velocity of flow = 5.0 ft/sec.

Briefly describe what is meant by (a) the separation function, (b) the filtration function, (c) the drainage function, (d) the reinforcement function, and (e) the containment function in Geosynthetics?

OTO t 2 • HW • 5-If a designer accepts a 5% chance of a flood control levee being overtopped in 25 years, what return period of flood should be used in the design? ||| = فلاتر O إضافة شرح... × mum

Which will cause an increase in runoff and infiltration in an area ?

A lateral sewer is to be designed to receive flow from 30 acres of a city in an area wherethe population density is 150 people per acre. If the average per capita flow rate is assumedto be 100 gpcd, what should be the design flow rate of the lateral, in gpm and cfs?

b.) Estimate the peak runoff flow rate observed in the combined sewer system in cfs generated only from storm water.

2. A sewer line is to be designed to accommodate minimum and maximum flows of 30 m³/d and 1730 m³/d, respectively, with a self-cleansing shear stress of 1 Pa. The minimum allowable sewer diameter is 200 mm, and the ASCE design aids give Manning's n values of 0.0093, 0.0107, and 0.0121 for Extra Care, Typical, and Substandard conditions, respectively; and a minimum-self-cleansing slope formula of 0.00711Q5 -0.5724 where Qmin is in liters per second. (a) Verify the adequacy of the minimum-self-cleansing slope formula and assess the adequacy of using the minimum allowable pipe diameter and the minimum-self-cleansing slope to meet the minimum and maximum-flow conditions. (b) What is the maximum flow that the sewer segment can safely accommodate. " min

What are the types of precipitation?

What size septic tank will you recommend for a 2-bedroom house? If the AR for the house is determined to be 0.4 gal/ft2 /day, what size drainfield should be designed? Show the layout for the drainfield if the trench width is 5 feet and the maximum length is 100 ft. Space the laterals 6 feet from each other on the center. How does your layout change if the drainfield area is determined from the figure based on a perc rate of 30 minutes/inch?