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Open Access Scientific Studies Supporting Development of a Dissolved Oxygen TMDL

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Scientific studies are being conducted to support the implementation of a dissolved oxygen TMDL in the San Joaquin River, CA. The Upstream Dissolved Oxygen TMDL Project combines traditional monitoring with scientific studies to address outstanding questions concerning how algae grow and accumulate in the SJR. It can be demonstrated that phytoplankton biomass production occurs in-situ, rather than as the result of biomass inputs from sources such as farm-ponds and agricultural drains. Although TMDL requirements are based on controlling loads, phytoplankton biokinetics are a function of nutrient concentrations, therefore evaluating water quality at the watershed level is an important step in developing a phytoplankton biomass control plan. Nonparametric methods are being used to rank drainages throughout the study reach and to develop water quality indexes with the objective of providing stakeholders a practical, scientific tool for setting remediation priorities on a watershed scale.

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Keywords: ALGAE; EUTROPHIC; LOWLAND RIVER; PHYTOPLANKTON; WATER QUALITY

Document Type: Research Article

Publication date: 2008-01-01

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