Comparison of Bathymetric Survey Methods
Comparison of Bathymetric Survey Methods
Link to this table
| Pollutant Removal Assessment Strategy | Description | Relative accuracy | Relative cost |
|---|---|---|---|
| Grid Survey - Relative Depth | Measuring relative depths along an X,Y grid of points or at monitored GPS locations. This method relies on determining the water surface elevation on the day of survey, either through a known benchmark or known pond outlet elevation. | Low | Low |
| Grid Survey - Total Station (TS), Real Time Kinematic (RTK) Survey | Similar to "relative depth" method, but utilizes TS or RTK survey to measure pond depths directly | Medium/high1 | Medium/high1 |
| Continuous survey - sonar | Continuous monitoring of pond depth using sonar. Many "fish finder" style sonar devices can be used for this application. Collected data can be sent to cloud processing companies to develop bathymetric volumes directly form collected data | Medium/high2 | High |
1Accuracy dependent on number of points collected, and cost dependent on if MS4 owns and has trained staff to operate TS/RTK survey equipment.
2Accuracy dependent on pond depth and vegetation (lower accuracy if less than 2 feet deep and/or highly vegetated