User’s Guide

Pond Volume Calculator
User’s Guide

Introduction

The Pond Volume Calculator utility allows you to quickly and easily calculate pond/detention basin storage capacities, water surface elevations, and stage storage quantities. It includes several calculation modes to make these tasks as simple as possible:

  • By Water Surface Elevation: Calculate storage volume at a known water surface elevation.
  • By Known Runoff Volume: Calculate the water surface elevation given a known base elevation (optional) and a known runoff volume.
  • Stage Storage by Elevation: Calculate stage storage volumes at elevation intervals.
  • Stage Storage by Volume: Calculate stage elevations at storage volume intervals.

The results of your calculations may be displayed as a table and in some cases a chart. The table may be copied to the Windows Clipboard for use in a spreadsheet, or may be inserted into the current DWG as a ‘block’ based table.

Computation Modes

By Water Surface Elevation

The By Water Surface Elevation computation mode allows you to calculate storage volume at a known water surface elevation.

The inputs for this mode are simple: A target surface, an optional boundary (closed polyline or feature line), and a water surface elevation.

A horizontal plane is calculated at the specified water surface elevation and the volume under this plane but above the specified surface (and optionally within the specified boundary) is returned.

The result is shown as a simple table which may be copied to the clipboard or exported to AutoCAD Civil 3D as a ‘block’ that appears as a table.

By Known Runoff Volume

The By Known Runoff Volume computation mode allows you to calculate the water surface elevation given a known base elevation (optional) and a known runoff volume.

The inputs for this mode are: A target surface, an optional boundary (closed polyline or feature line), a tartet runoff volume, an optional base water surface elevation, and a volume tolerance.

This computation mode will attempt to solve for a water surface elevation within the given constraints which results in a storage volume that is within the specified tolerance from the target volume. If you need to model adding a differential volume to an existing pond of known water surface elevation, you may enable the Use Base Water Surface Elevation option and specify a Base Water Surface Elevation. This computation mode uses an iterative solution and may take some time to complete.

The result is shown as a simple table which may be copied to the clipboard or exported to AutoCAD Civil 3D as a ‘block’ that appears as a table.

Stage Storage by Elevation

The Stage Storage by Elevation computation mode allows you to create a stage storage volume table at elevation intervals. You can also specify specific elevations for which a value is needed. Intervals may be specified based on number of layers (e.g. ‘10x’), by fixed interval (e.g. ’10.0’), or by percentage of the elevation range (e.g. ‘10%’). Minimum and maximum elevations can be specified, as can special elevations as a semicolon separated list (e.g. ’10.1;11.3;11.5’). You can also force the regular elevations to be at multiples of the specified interval.

This computation mode first determines all of the elevations for which a value should be calculated, and then performs a calculation similar to that used in the By Water Surface Elevation computation mode for each of these elevations; the results are tabulated and a chart of the data is also shown. The tabulated data can be copied to the Windows Clipboard or exported to AutoCAD Civil 3D as a ‘block’ that appears as a table.

Stage Storage by Volume

The Stage Storage by Elevation computation mode allows you to compute stage elevations at storage volume intervals. Like with the Stage Storage by Elevation computation mode, intervals may be specified as a specific number of intervals, an interval amount, or an interval percentage. You may also specify ‘special volumes’ as a semicolon delimited list.

As is the case with the By Known Runoff Volume computation mode, the solutions presented for this computation mode are calculated iteratively; because of this, we also include a Tolerance setting.

This computation mode first determines all of the runoff volumes for which a value should be calculated, and then performs a calculation similar to that used in the By Known Runoff Volume computation mode for each of these values; the results are tabulated and a chart of the data is also shown. The tabulated data can be copied to the Windows Clipboard or exported to AutoCAD Civil 3D as a ‘block’ that appears as a table.

 

The web store has been temporarily placed in demo/test mode while we update and test some new features. If you see this message and wish to make a purchase please contact sales@civilplus.net. Thank you.