Water Quality Assessments

Water Quality Assessments PDF

Author: Deborah V Chapman

Publisher: CRC Press

Published: 1996-08-22

Total Pages: 658

ISBN-13: 0419215905

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This guidebook, now thoroughly updated and revised in its second edition, gives comprehensive advice on the designing and setting up of monitoring programmes for the purpose of providing valid data for water quality assessments in all types of freshwater bodies. It is clearly and concisely written in order to provide the essential information for all agencies and individuals responsible for the water quality.

An Assessment of Water Quality Impacts of Maintenance Dredging on the Upper Mississippi River in 1979

An Assessment of Water Quality Impacts of Maintenance Dredging on the Upper Mississippi River in 1979 PDF

Author: Dennis D. Anderson

Publisher:

Published: 1981

Total Pages: 114

ISBN-13:

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In connection with the 1979 maintenance dredging season, the Corps of Engineers, St. Paul District, investigated the water quality impacts of hydraulic and clamshell dredging operations at five selected sites on the Upper Mississippi River. Turbidity values and suspended solids were monitored at all sites, and selected chemical parameters were monitored at two hydraulic dredging sites. At most sites, dredging and disposal operations produced minor and localized changes in water quality. No statistically significant increases in chemical parameters were noted due to hydraulic dredging operations. However, effluents from the disposal area did cause some elevations of heavy metals (cadmium, lead, nickel, zinc, copper, chromium) and total ammonia. None of the chemical parameters tested exceeded their maximum permissible level proposed by Federal Water Quality Criteria. The five monitoring studies generally indicated that rapid settling and dilution occurred near and downstream of dredging and disposal operations.

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