Long-Term Effects of Dredging Operations Program: Refinement of Column Settling Test Procedures for Estimating the Quality of Effluent from Confined Dredged Material Disposal Areas
Abstract
Column settling test procedures are used in designing confined dredged material disposal areas for effective sedimentation and initial storage of solids. This report presents the results of a study in which the test procedures were refined to allow a prediction of the effluent suspended solids concentration for conditions normally found when saltwater sediments are encountered. For this case, the dredged material normally settles by zone settling, forming a clarified supernatant in the confined disposal area. This study determined that the settling behavior of the fine particles initially remaining in the supernatant following zones settling is flocculent settling. Procedures were developed for predicting effluent concentrations as a function of retention time and other pertinent operating conditions. The ability to make such predictions is essential if total concentrations of contaminants in the effluent from confined disposal areas must be determined. Keywords: Waste disposal; General confinement; Contaminants; Dredged materials; Effluent quality; Suspended solids; Turbidity.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1988
- Accession Number
- ADA203359
Entities
People
- Edward L. Thackston
- Michael R. Palermo