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Nebraska Pond Management - Second Edition

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� � � � � � � � � � � � � � � � � � � second edition • Nebraska Pond Management • 83 CALCULATING THE SURFACE AREA AND VOLUME OF A POND P resented below are formulas for calculating the surface area of a pond. Pick a shape that most closely resembles the pond and measure the necessary distances in feet. Put these measurements into the appropriate equation and multiply to find the surface area in square feet. Surface area in acres is simply obtained by dividing the surface area by the number of square feet in an acre (43,560). If a pond is irregular in shape, the best thing to do is divide it into workable shapes and then add the areas of the smaller units together to get the area of the whole. CIRCLE = 3.14 x radius 2 EXAMPLE: pond radius 100 feet x 100 feet x 3.14 = 31,400 square feet total surface area ÷ 43,560 = .72 surface acre RECTANGLE = length x width EXAMPLE: pond length 250 feet x width 150 feet = 37,500 square feet total surface area ÷ 43,560 = .86 surface acre TRIANGLE = base x height EXAMPLE: pond base 300 feet x 2 height 150 feet = 45,000 square feet ÷ 2 = 22,500 total surface area ÷ 43,560 = .52 surface acre APPENDIX C radius (100') length (250') width (150') base (300') height (150')

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