depth some geometric shapes are simple to calculate e.g squares rectangles and ... depth and adding all sections be sure to include the water in filters piping ... waterfalls etc the following tables present equations that are used to ... 3 surveying the ponds using a transit to determine area get depths from ... topography 4 drawing the pond on graph paper ... divided into squares of known size to calculate surface area 5 determining ... cad software 6 filling the pond using a totalizing water meter or 7 estimating the volume ... cylinder elliptical depression area conversion factors multiply by to obtain length ... conversion factors multiply by to obtain length conversion factors ... multiply by to obtain acres acres acres acres hectares ...