![]() Surveying can also help identify issues common with dredging such as coarse debris, uneven surfaces, stumps/logs, and other anomalies. Depending on the project you may only need a certain set of data to base your dredging project on. Surveys may include core sampling to determine the density, composition, particle size distribution, and other sediment characteristics by depth. Hydrographic surveying is a broader term that includes mapping both the water depth and sediment characteristics. Sedimentation surveys will include the location and depth of sediment relative to the water surface and most of the time the hard-pan (original lake bottom) that is typically denser composition material (clay, rock, liner, etc.). ![]() Water depths are an important aspect when planning where to dredge, if a dredge will have enough water to float, or how far to lower the water level. Bathymetric surveying usually refers to mapping the top of the surface below the water surface. An unsuccessful dredging project may quickly end because of poor planning and not knowing what to expect below the water surface.
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