[PDF] Habitat Development Field Investigations Windmill Point Marsh Development Site James River Virginia Appendix F Environmental Impacts Of Marsh Development With Dredged Material Sediment And Water Quality Volume I Characteristics Of Channel Sediments Before Dredging And Effluent Quality During And Shortly After Marsh Habitat Development eBook

Author : Donald D. Adams
Publisher :
Page : 86 pages
File Size : 26,13 MB
Release : 1978
Category :
ISBN :

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This volume is the first of a two-volume appendix presenting the results of chemical and sedimentological studies conducted at a dredged material marsh development site located near Windmill Point, on the tidal freshwater James River, 16 km below Hopewell, Virginia. Navigation channel sediments were collected in January 1975, before dredging and marsh development, and described according to their temperature, pH, oxidation reduction potential, percent water, percent volatile solids, particle size composition, mineralogy, and cation exchange capacity. Sediment interstitial water and total sediment concentrations of sulfides and various nutrients and metals were also documented. The relationships between channel sediment characteristics and the chemical quality of effluent leaving the diked marsh development site were studied under three different conditions: (a) in January, 1975--during actual dredging and dredged material disposal for marsh substrate development, (b) during dewatering (2-4 days after the completion of dredged material disposal operations), and (c) in May 1975- 3.5 months after dredging, before the beginning of marsh vegetation planting operations had begun or any extensive natural vegetation development had occurred. Particulate concentrations of chemical substances in the dike effluent during dredging were apparently influenced by oxidation and reduction reactions and solubilization from exchangeable or organic sediment phases. Effluent concentrations were compared with channel sediment concentrations.

Author : Karen Schneller-McDonald
Publisher :
Page : 198 pages
File Size : 17,57 MB
Release : 1990
Category : Restoration ecology
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"This report provides a hard copy of the bibliographic information contained in the digital Wetland Creation/Restoration Data Base. One thousand one hundred data base records are included; each of these represents one article, report, or other publication dealing with the creation or restoration of wetlands. Information in the records is ... accessible via a cross-referenced index divided into four sections (Location Index, Plant Genus Index, Wetland Type Index, and Subject Index."--Page 1 Abstract.