Table 11
Summary of Water Level
Characteristic
Targets
Nuisance aquatic macrophytes.
Unconsolidated sediments.
Modes of action
Desiccation and freezing of thallus, roots, rhizomes,
and other reproductive structures.
Sediment consolidation and oxidation.
Winter
highly effective against some species.
Effectiveness
Longevity
Usually effective for at least 1 year.
Negative features
Proliferation of resistant species.
Limited access to water during withdrawal.
Reduced storage volume.
Minimal.
Highly applicable for reservoirs where operation
Applicability to
reservoirs
allows drawdown.
References
Beard, T. D.
1973. "Overwinter Drawdown:
Impact on the Aquatic Vegetation
in Murphy
Wisconsin," Technical
NO. 61, Department of Nat-
ural Resources, Madison, WI.
"The Role of Vegetation in Shoreline Management,"
Clemens, R. H. Undated.
Great Lakes Basin Commission, Ann Arbor, MI.
"Lake Level
as a Macrophyte Control Technique,"
Cooke, G. D.
1980.
Wat. Res. Bull.,
Cooke,
D., E. B. Welch, S. A. Peterson, and P. R.
1986. Lake and
Restoration, Ann Arbor Science, Butterworth Publishers, Boston,
Culver, D. A., J. R. Triplett, and G. B. Waterfield.
1980. "The Evaluation
of Reservoir Water-level
as a Fisheries Management Tool in Ohio,"
Ohio Dept. Natural Resources Project Report F-57-R, Study 8, Columbus, OH.
Forsberg, C.
"Quantitative Sampling of Subaquatic Vegetation,"
Geagan, D.
1960. "A Report of a Fish Kill in
Lake, Louisiana, During
a Water Level Drawdown,"
La.
Sci.,
114
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