Which of the following practices can be classified as an acceptable dewatering method?

The most suitable choice for an acceptable dewatering method is a sediment trap or basin. These structures are specifically designed to manage and control sediment-laden water that may result from construction activities or land disturbances.

Sediment traps or basins serve multiple functions: they allow sediment to settle out of the water before it is discharged into nearby water bodies, thus protecting water quality, and they help manage runoff by capturing and temporarily storing water. By doing so, they mitigate erosion and sediment transport, which are key components of effective erosion and sediment control practices. This makes them a robust option in managing water during the dewatering process.

Other options like a portable sediment tank, a filter bag, and a portable sump pit may have some utility, but they do not offer the same level of comprehensive sediment control and filtration as a sediment trap or basin. Portable sediment tanks and filter bags can be effective in certain situations, yet they typically serve more specialized purposes rather than functioning as a primary dewatering method. A portable sump pit might collect water, but without the additional sediment management capability, it is less effective in addressing the broader concerns of sediment control.