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What is the formula for calculating discharge?
From cross-section and average speed. The flow rate of a stream is equal to the flow velocity (speed) multiplied by the cross-sectional area of the flow. The equation Q=AV (Q=discharge rate, A=area, V=velocity) is sometimes known as the discharge equation.
How do you calculate the discharge of a river?
Measuring Discharge Discharge is the volume of water moving down a waterway per unit of time. It is most commonly expressed in cubic feet per seconds or gallons per day. To calculate discharge, multiply the area of water in a channel cross section by the average velocity of water in that cross section.
How do you calculate pump discharge?
To calculate the discharge head, we determine the total head from the characteristic curve and subtract that value from the pressure head at the suction, this gives the pressure head at the discharge which we then convert to pressure.
How do you calculate surface water discharge?
Surface Water
- Select drain run to be calculated.
- Calculate the effective roof area of all buildings that enter this drain run and enter the total into column B.
- Multiply ‘B’ by the rainfall intensity (normally 50mm/hour) and divide by 3600 to convert the flow rate to l/s.
How do you calculate the discharge of a water pump?
How is annual discharge calculated?
How is it calculated? Mean annual flow is obtained by dividing the sum of all the individual daily flows by the number of daily flows recorded for the year. You can also select the average function (=average( ) ) in Excel to the find the mean annual flow.
How do you calculate monthly discharge of a river?
The sum of daily flows for each month, when divided by the number of days in the month, will give the mean flow for that month. Then, sum each year’s monthly data for a particular month and divide by the number of years to obtain the mean monthly flow for that month for the period of record.
What is the formula for discharge of centrifugal pump?
Explanation: Discharge of a centrifugal pump is directly proportional to (Diameter)^2 of its impeller. Head of a centrifugal pump is directly proportional to (Diameter)^2 of its impeller. Power Developed of a centrifugal pump is directly proportional to (Diameter)^4 of its impeller.
What is discharge unit?
A discharge is a measure of the quantity of any fluid flow over unit time. The quantity may be either volume or mass. The units that are typically used to express discharge in streams or rivers include m3/s (cubic meters per second), ft3/s (cubic feet per second or cfs) and/or acre-feet per day.
What is the formula to calculate discharge?
Use the formula q=va to calculate the discharge of a river, where “q” is the discharge, “v” is the velocity and “a” is the cross-sectional area of the river. Measure the depth and the width of the river. For example, assume a river is 4 metres deep and 5 metres wide in one area. Multiply the depth by the width to find the cross-sectional area.
How to calculate discharge rate?
How to Calculate Battery Discharge Rate Calculating Discharge Rate. You can use Peukert’s law to determine the discharge rate of a battery. Understanding Battery Capacity. Battery Discharge Curve Equation. Battery Discharge Calculator. Capacitor Charging and Discharging Applications.
How do you calculate stream discharge?
The discharge of a stream is the product of its velocity (V – length of travel per unit of time such as feet/second) times depth of the water (D – unit of length) times width (W of the water – units of length). (Make sure all all three lengths are expressed in the same unit.) Discharge = V x D x W
What is stream discharge equation?
Discharge, or the volume of water flowing in a stream over a set interval of time, can be determined with the equation: Q = AV, where Q is discharge (volume/unit time-e.g. m 3/second, also called cumecs ), A is the cross-sectional area of the stream (e.g. m 2), and V is the average velocity (e.g. m/s).