Summary
Sediment removal is used for deepening, and secondarily to remove
nutrient-rich or contaminated sediments and to control macrophyte infesta-
tions.
Sediment removal projects require careful planning, design, and con-
struction since the costs may be considerable and there is potential for
Planning
include dredge
sed-
negative environmental impacts.
A summary of the method is given
iment analysis, and containment area design.
in Table 5.
Table'5
Summary of Sediment Removal
Description
Characteristic
Shoaled areas.
Targets
Nutrient-rich or contaminated sediments.
Nuisance
macrophytes.
Sediments are removed.
of action
Highly
effective; problems
eliminated.
Effectiveness
Longevity
Years, if dredged deeply and/or sediment income
controlled.
Negative features
Temporary
turbidity
and
nutrient
release.
Improper disposal design may lead to release of
or discharge of turbid water with high
turbidity, nutrient content, and oxygen demand.
High (
||content||
.24 to .00for uncontaminated
sediments).
Applicability to
Highly
applicable.
reservoirs
81
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