!colspan = "2" style="background: darkcyan; color: white; align = center"|Curves
!colspan = "2" style="background: darkcyan; color: white; align = center"|Curves
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|colspan = 2|The Curves table is designed to accommodate ponds of roughly conical dimensions. A rainwater cistern is usually cuboid or cylindrical in shape, so that the area (m<sup>2</sup>) will remain the same throughout the depth. Instead, the dimensions of the rainwater cistern can be placed into the fields:
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|colspan = 2|The Curves table is designed to accommodate ponds of roughly conical dimensions. Rainwater cistern are usually cuboid or cylindrical in shape, so that the area (m<sup>2</sup>) will remain the same throughout the depth. The top and bottom dimensions can be placed within the first two rows of the table.