Aquatic Disposal Field Investigations Duwamish Waterway Disposal Site Puget Sound, Washington. Appendix D. Chemical and Physical Analyses of Water and Sediment in Relation to Disposal of Dredged Material in Elliott Bay. Volume I. February-June 1976.
Abstract
A study was conducted on the chemical and physical effects of open-water disposal of dredged material from the Duwamish River into Elliott Bay, Washington. The water column at the disposal and reference sites was monitored during and after the dredged material disposal operation for suspended solids, pH, nutrients (NH3-N, NO2 + NO3 and O PO4-P), and dissolved heavy metals (Hg, As, Cr and Mn). The river sediments were evaluated for particle size distribution, Eh, organic C, sulfides, nutrients (NH3-N, NO2 + NO3 and O PO4-P), and bulk and interstitial heavy metals (Hg, As, Cr and Mn) prior to dredging. The river sediments which were dumped at the experimental bay site were heterogeneous in their physical and chemical character although on the average NH3-N, alkaline soluble sulfide and total Hg were several times higher than the bay sediments. During the disposal operation near bottom water column concentrations of d-Mn, suspended solids and NH3-N were elevated for a short time (generally minutes) at the disposal site. No chemical differences were observed between the water column at the disposal site and reference sites during the sampling at 1 week, 1 month and 3 months after the termination of the disposal operation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1978
- Accession Number
- ADA058000
Entities
People
- D. J. Baumgartner
- D. W. Shults
- J. B. Carkin
Organizations
- University of Washington