Figure 10-4a. A Core from Subaqueous Soil Sampling
Cutting open the core with electric shears.
Subaqueous soils can be sampled by several traditional soil approaches, but marine science approaches are best. For cursory descriptions and sampling, a standard bucket auger can be used. In order to sample from the exact location with depth, some soil mappers use a piece of PVC pipe with an inside diameter a little larger than the teeth on the bucket auger. The auger is placed into the pipe, and the sample is collected in the typical fashion. While the bucket is being removed, the PVC pipe is pushed deeper into the soil. The sample is retrieved and placed in a tray (typically a meter-long piece of vinyl gutter). The auger bucket is pushed down the pipe again, the spoil from pushing the PVC pipe down is removed, and then the next depth is sampled. This procedure is effective for sampling the upper 75 cm of the soil. Below this depth, however, collecting samples with a bucket auger becomes very difficult.
Core barrels are best opened by laying the core down on a table or lab bench and cutting lengthwise on opposite sides with electric metal shears.
Soil Survey Manual, Ag. Handbook 18, 2017, (p. 511).
Figure 10-4a. A Core from Subaqueous Soil Sampling
Cutting open the core with electric shears.
Subaqueous soils can be sampled by several traditional soil approaches, but marine science approaches are best. For cursory descriptions and sampling, a standard bucket auger can be used. In order to sample from the exact location with depth, some soil mappers use a piece of PVC pipe with an inside diameter a little larger than the teeth on the bucket auger. The auger is placed into the pipe, and the sample is collected in the typical fashion. While the bucket is being removed, the PVC pipe is pushed deeper into the soil. The sample is retrieved and placed in a tray (typically a meter-long piece of vinyl gutter). The auger bucket is pushed down the pipe again, the spoil from pushing the PVC pipe down is removed, and then the next depth is sampled. This procedure is effective for sampling the upper 75 cm of the soil. Below this depth, however, collecting samples with a bucket auger becomes very difficult.
Core barrels are best opened by laying the core down on a table or lab bench and cutting lengthwise on opposite sides with electric metal shears.
Soil Survey Manual, Ag. Handbook 18, 2017, (p. 511).