a plastic tile drain pipe is installed to carry a design flow from 3000ft of tile spaced 140 ft . if the soil drainable porosity is 0.06 and the drainage coefficinet to drop the water table is 0.21 m/day . and the grade of the tile is 0.2percent . the roughness cofficient (n) is 0.017 . the design diameter of the drain pipe (d) is egual             meter ?

A circular clarifier has diameter of 75 feet with an in-board launder (2 feet wide) set at 65 feet diameter. The Clarifier receives 2.9 mgd. What is the Overflow rate (OFR) and what is the Weir Loading Rate. If the Clarifier also has a depth of 14 feet, what is the detention time. LIGHT POLE BRACKET SET NO LAS COLE PAHALLD (P) P922 INFLUENT FEEDWELL ClALIER DIA Launder Dia WALKWAY BRIDGE SLUDGE DOLLECTOR WECHANISM -TAKE ARM CLUDGE HOPPER B SECTION 1/81-0 TAS100 LAUNDER SAFETY LIFE LAUNdee ASSUME CIRCULAR 24 SE EL 200 LEX GROOVED END (PLG (TYP)

For a small drainage area, the infiltration rate at the start of rainfall storm was record to be 90 mm/hr and decreased exponentially to a constant rate of 8 mm/hr after 2.5 hr. The total infiltration during 2.5 hr was 50 mm. Develop the Horton's equation for the infiltration rate at any time t < 2.5 hr

NaOCI pumping rate, Qss = () L/s? (*No unit) Qin = 8000 GPM Cin = 0.0 mg/L Slip Stream Qss = ? L/s Css = 200 mg/L Main service line Qout = 8000 GPM Cout = 4.0 mg/L %3D

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An existing rectangular clarifier at a drinking water treatment plant is 18 ft wide and 72 ftlong. It was originally designed for an overflow rate of 600 gpd/ft2 and it is currentlyoperating at its design capacity. Inclined-tube settling bundles are to be added and willoccupy 80 percent of the plan area, inlet flow distribution systems for the retrofitted tubebundles excludes flow through the remaining 20 percent of the surface area. Tubebundles will have a design overflow rate of 5,000 gpd/ft2. Complete an analysis todetermine the present capacity in gal/day, and the increased capacity in gal/day after thetube bundles are installed.

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No wrong answers please. A rectangular settling tank without mechanical equipment is to treat 1 million litres of raw water per day. If the design criteria are that the detention period is 2,5 hours, the velocity of flow is 8 cm/min and the depth of the water and sediment is 4,5 m, then what would be i The length of the tank, ii. The width of the tank if an allowance of 1,5 cm is to be made for sediment, lil The over flow rate of the tank?

Determine the discharge in a composite gutter section if Sx = 0.033, SL = 0.015, a = 0.066 m, W = 0.6 m, and T = 1.95 m. Assume that the Manning roughness factor (n) equals 0.015.