drainage calculation formula - Axtarish в Google
To do this, we simply multiply across each row. The runoff, Q, for the roof area in drainage Zone A is: (1.00 x 1.5 x 500) / 96.23 = 7.79 gallons per minute.
This formula can help us calculate peak run off rate for capture and conveyance of water as well as calculating runoff rate for retention/detention volume.
1 DFU = 1 cubic foot of water drained through a 1 1/4" diameter pipe in one minute. (1 ft³ /min water drained through a 1 1/4" diameter pipe). 1 DFU ≈ ( ...
Hooghoudt's equation · Q = steady state drainage discharge rate (m/day) · Ka = hydraulic conductivity of the soil above drain level (m/day) · Kb = hydraulic ...
Appendix 9: Drainage Calculations. Page 2. Page 3. Hydraulic Calculation (Discharge Capacity of Drainage Facilities)(1/3) γ. (mm/h). (m2). (C). (m3/s). ◇. 1.
Drainage Intensity (in/day or cm/day) is calculated by the Hooghoudt equation and is dependent on the effective saturated hydraulic conductivity of the soil ...
30 мая 2019 г. · The rational method equation is used to calculate the peak discharge for facilities serving a drainage area less than 200 acres. The runoff ...
A gradient may be defined as fall divided by distance. GRADIENT = FALL / DISTANCE If a 48 metre section of drainage pipe has a fall of 0.60 metres, the ...
Take the roof's total square footage and divide by the total square footage handled by one drain. The result is the number of drains needed. For example ...
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