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 4.9 ALTERNATE MANAGEMENT OPPORTUNITIES
INTRODUCTION
Additional management opportunities exist in methods oriented towards nutrient management or
chemical remediation. These techniques often utilize a more biologically oriented approach than
traditional "engineering" approaches previously described. A partial list of these techniques is provided
in table 4.9.1. These methods are discussed in more detail in Cooke and Kennedy (1989). Excerpts
from Cooke and Kennedy (1989) are included as Appendix 4.9A.
Table 4.9.1. Partial List of Water Quality Management Techniques for Reservoirs and Tailwaters
Technique
Application
Improve inflow quality (e.g., reduce nutrient,
Dilution and flushing
sediments, and contaminant loads)
Improve inflow quality (e.g., reduce nutrient,
Diversion
sediments, and contaminant loads)
Biomanipulation
Reduce algal blooms
Nutrient inactivation
Reduce algal blooms and nutrient export
Nutrient addition
Modify Nitrogen:Phosphorus ratio for algal control
Sediment removal
Remove contaminants and nutrients, increase storage
Sediment oxidation
Inactivate nutrients
Sediment covering
Isolate contaminants, reduce nutrient cycling
Macrophyte harvesting
Remove macrophytes
Herbicide application
Control macrophytes
Algicide application
Control algae
4.9.1 NUTRIENT MANAGEMENT
Nutrient management can be accomplished by management of external sources (inflows,
groundwater, surface runoff) and internal sources (mobilization from sediments and plants). External
sources are best managed in the watershed at point and nonpoint sources as discussed previously.
Often watershed management is not readily available and alternate techniques such as dilution, flushing,
and diversion are used. Dilution and flushing is a function of water management and may be
accomplished in multi reservoir systems if project operations include some latitude in applying area-
capacity curves. The concept here is to pass water with elevated nutrient concentrations from one
4.9.1
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