The Effects of Small Dam Removal on the Distribution of Sedimentary Contaminants

@article{Ashley2006TheEO,
  title={The Effects of Small Dam Removal on the Distribution of Sedimentary Contaminants},
  author={Jeffrey T. F. Ashley and Karen L. Bushaw-Newton and Matt Wilhelm and Adam R Boettner and Gregg Drames and David J. Velinsky},
  journal={Environmental Monitoring and Assessment},
  year={2006},
  volume={114},
  pages={287-312}
}
With increasing concern over degradation of aquatic resources, issues of liability, and maintenance costs, removal of small dams has become increasing popular. Although the benefits of removal seem to outweigh the drawbacks, there is a relative paucity of studies documenting the extent and magnitude of biological and chemical changes associated with dam removal, especially those evaluating potential changes in contaminant inventories. In August and November of 2000, a run-of-the-river dam on… 

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References

SHOWING 1-10 OF 38 REFERENCES

Limited bioavailability of sediment pah near an aluminum smelter: Contamination does not equal effects

A Sediment Quality Triad study involving synoptic measures of polycyclic aromatic hydrocarbon (PAH) contamination, toxicity, and resident community (benthic infauna, crab) alteration was conducted to

Hydrophobic organic contaminants in surficial sediments of baltimore harbor: Inventories and sources

The heavily urbanized and industrialized Baltimore Harbor/Patapsco River/Back River system is one of the most highly contaminated regions of the Chesapeake Bay. In June 1996, surficial sediments were

Effects of Dam Removal on River Form and Process

D have a profound influence on fluvial processes and morphology. Reservoirs formed by dams drown river channels and trap sediment. Downstream reaches respond to altered flow regimes and reduced

Tidal river sediments in the Washington, D.C. area. II. Distribution and sources of organic contaminants

Concentration of aliphatic, aromatic, and chlorinated hydrocarbons were determined from 33 surface-sediment samples taken from the Tidal Basin, Washington Ship Channel, and the Anacostia and Potomac

AN INTEGRATIVE APPROACH TOWARDS UNDERSTANDING ECOLOGICAL RESPONSES TO DAM REMOVAL: THE MANATAWNY CREEK STUDY 1

ABSTRACT: Dam removal has been proposed as an effective method of river restoration, but few integrative studies have examined ecological responses to the removal of dams. In 1999, we initiated an

Incidence of adverse biological effects within ranges of chemical concentrations in marine and estuarine sediments

Matching biological and chemical data were compiled from numerous modeling, laboratory, and field studies performed in marine and estuarine sediments. Using these data, two guideline values (an