how do you calculate rain water volume?
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To calculate how much rainwater can be harvested, multiply your rainfall (mm) by your roof surface area (m2) being used to catch rainwater. The resulting number represents how many litres of water you can expect to collect.
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In terms of volume, with a rainfall of 10 mm, every square metre of the field receives 0.01 m, or 10 litres, of rain water. With a rainfall of 1 mm, every square metre receives 1 litre of rain water. A rainfall of 1 mm supplies 0.001 m3, or 1 litre of water to each square metre of the field.
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You can measure the volume of a solid object by measuring the volume of water that the object displaces. The volume of water displaces by the object is equal to its volume. Because 1 mL is to 1 cm cubed, you can express the volume of the water displaced by the object in cubic centimeter.
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['Surface area: 42 square metres. Divided by.', 'Spreading rate: 11 square metres per litre. Multiplied by.', 'Number of coats: 2 coats. Equals.', '42/11 x 2 = 7.6 litres.']
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The first thing you need to do is multiply the length by the width by the height. That gives the number of cubic millimetres. To calculate the number of litres, you then divide that number by a million.
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Here is an example using the rectangle pond. If you pond is 2.5m long and 1.2m wide and about 40cm deep, you would then do the following using the formula (W x L x average depth x 1000) 1.2 x 2.5 x 0.4 x 1000 = 1200 litres. When calculating the volume of a cylinder, R refers to the radius.
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Multiply this number by the height to determine the cubic volume in inches. For example, if you have a tank that is 12 inches in diameter and 20 inches high, the calculation looks like this: Divide the cubic volume in inches by 231 in order to find the number of gallons.
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If you pond is 2.5m long and 1.2m wide and about 40cm deep, you would then do the following using the formula (W x L x average depth x 1000) 1.2 x 2.5 x 0.4 x 1000 = 1200 litres. When calculating the volume of a cylinder, R refers to the radius.
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['Measure or pace the sides or circumference of the dam at the elevation of the spillway discharge. ... ', 'Measure the difference in height between the current water surface and the spillway discharge.', 'Add this measurement to the current depth to calculate the water depth when the dam is full.']
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Calculating density uses the formula D = m ÷ v, where D means density, m means mass and v means volume. Find mass using a balance scale, and use water displacement to find the volume of irregular objects.
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Calculating Water Use To calculate the amount of water you use, multiply the width times the length of your yard in feet to get the number of square feet of area. Then multiply that figure by 0.623 to come up with the number of gallons used (or use our calculator below).
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['Fill a beaker or graduated cylinder with enough water to completely immerse the sphere in.', 'Record the baseline initial measurement.', 'Drop the sphere in.', 'Record final measurement.', 'Subtract the initial volume from the final volume ~ this is the volume of the sphere!']
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cm, say, collects 1 cm height water. When poured in a measuring glass cylinder with 10 Sq Cm base, the height will be amplified to 10 Cm but graduation will show as 1 cm; 1 cm will be 1 mm;and 0.1 cm will be 0.1 mm. So rainfall can be measured correct up to 0.1 mm. 9.5K views. View 4 Upvoters.
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['Determine the length and width of the area you want to cover with soil. ... ', 'Calculate the area, multiplying the length by width. ... ', 'Establish the depth - thickness of the topsoil layer. ... ', 'Multiply the area and dirt layer thickness to obtain its volume: 56 * 0.5 = 28 yd² .']
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Suppose you have a vessel, preferably cylindrical, and kept on a horizontal base, the height up to which the rain is collected measures the rainfall. If it is one Cm, it is one cm rainfall. To measure accurately, a measuring glass of 1/10 th base area of the rain gauge will be used.
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Find the volume of your tank. To determine the volume of a rectangular tank, multiply the length (l) times the width (w) times the height (h). The width is the horizontal distance from side to side.
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Divide the number that you wish to determine the percentage for. Using the example above, let's say that it rained 15 days out of the 30 days in April. You would divide 15 by 30, which equals 0.5. Multiply the value from step two by 100.