Calculating Sediment for Dredging Plan in Georgia

Aquatic Environmental Services, a lake mapping partner within The Mapping Network completed a lake survey for a reservoir near Atlanta, Georgia. The current water depths were mapped as well as the depth to hard bottom. The difference between the current water depth (top of sediment) and the hard bottom is the amount of soft sediment that can be removed to bring the lake back to the original depths. The client is preparing for dredging proposals and they needed to know the current water volume and the amount of material to be removed to achieve full capacity.

Top of Sediment and hard bottom depths — The top map shows the current water elevations in the lake. The bottom map is what the original lake bottom elevations based on sediment probes. The difference between the two maps is the amount of sediment that needs to be removed by the dredging contractor.

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