The Role of Seabed Dynamics in Controlling the Distribution and Preservation of Polycyclic Aromatic Hydrocarbons (PAHs) in Estuarine Sediments
Abstract
LONG-TERM GOALS: Physical processes occurring at or near the water-sediment interface alter, redistribute and control the residence times and accumulation of organic contaminants. The overall objective of this study is to examine the role that energy regime and associated seabed dynamics (e.g., frequency and depths of resuspension) play in controlling the distribution of polycyclic aromatic hydrocarbons (PAHs) in estuarine sediments. OBJECTIVES: Our objectives are to examine the effects of episodic and short-term variations in seabed erosion/deposition on: (1) the redistribution of organic contaminants between dissolved and particulate phases and (2) the advection and release of contaminants present in interstitial waters to the overlying water column. Specifically, this study is using a number of geochemical tracers to examine processes influencing the distribution of dissolved and solid-phase PAHs in estuarine sediments. These proxies will be used to quantify particle residence times in surface sediments, as well as rates of sediment accumulation and degree of disturbance. Our study is being conducted at sites representative of contrasting depositional environments in the southern Chesapeake Bay and one of its sub-estuaries, the York River.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 1999
- Accession Number
- ADA619290
Entities
People
- Elizabeth A. Canuel
- Rebecca M. Dickhut
- Steven A. Kuehl
Organizations
- Virginia Institute of Marine Science