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phosphorus

Algal availability of phosphorus discharged from different catchment sources

Algal Management Strategies, Nutrient Management Strategies and Catchment Management Plans frequently have as a major focus the reduction of phosphorus loads to surface waters. The expressed intention of the nutrient control is to reduce the frequency and intensity of algal blooms, particularly blooms of toxic cyanobacteria. In many instances a direct link between the magnitude of algal blooms and phosphorus loads has not been demonstrated. However, there is appreciable information in the scientific (more)...

Sources and delivery of suspended sediment and phosphorus to Australian rivers

“Combining tracers and landscape modelling to predict sediment and phosphorus from different landuses and erosion processes” Sedimentation in streams and rivers draining agricultural land has resulted in severe environmental degradation. Eutrophication is a major associated issue, and the persistent occurrence of algal blooms has been linked with excess available P. The total amount of P in these systems has been shown to be dominated by the sediment bound load derived from erosion of (more)...

Indicator protocols: Total phosphorus + flow leaving a sub-catchment or whole catchment

Nutrients in aquatic environments: phosphorus.

Phosphorus is an essential element required by animals and plants and high levels of phosphorus can be an important contributor to eutrophication – especially in freshwater and estuarine systems. Symptoms of eutrophication may include algal blooms and seagrass decline. Phosphorus in aquatic systems is generally partitioned into particulate (organic and sediment-bound) and dissolved fractions. Dissolved phosphorus (measured as FRP) is found in the form of (more)...

Investigation improvement to irrigation drainage systems

NPSI Factsheet No. 4

The Goulburn Broken Catchment Management Authority identified irrigation drainage as contributing 47% (1999) of the total catchment phosphorus loads to the Murray River each year. Environment Protection Authority guidelines for managing environmental impacts of construction projects, in this case the mobilisation and transport of sediments in both new and old drainage systems, also highlighted the need for appropriate drain construction and maintenance techniques. In response, this project (more)...