Knowra Flood control Flood control Flood control comprises measures that reduce the likelihood, extent, or impacts of flooding, using engineered structures, land management, forecasting, and emergency planning.
Levee : An embankment built to confine water within a river channel or keep it from surrounding land. Levees reduce inundation by raising barriers along rivers and coasts.
Flood forecasting : The use of observations and models to estimate the timing, location, and magnitude of floods. Forecasts provide time to operate defenses and move people or property.
Flood mitigation : Actions that reduce the damage or consequences of floods, whether or not flooding occurs. Mitigation includes reducing losses, while flood control often emphasizes water management.
Levee effect : The tendency for flood defenses to encourage development in protected areas, increasing potential losses when defenses fail or are exceeded. Apparent safety behind levees can increase the consequences of rare failures.
Nature-based solutions : Actions that protect, manage, or restore ecosystems to address societal challenges while benefiting people and nature. A central question is when ecological measures can complement or replace engineered defenses.
Flood barrier : A structure designed to block or redirect floodwater, often temporarily or at a specific opening. Deployable barriers close gaps where fixed defenses cannot protect against surges.
Flood warning : An alert that communicates an expected or occurring flood and the actions needed to reduce harm. Warnings turn forecasts into protective action before water reaches people.
Managed retreat : The planned relocation of people and assets away from areas exposed to hazards. Retreat reduces exposure instead of trying to hold floodwater back.
Levee failure : The breaching, overtopping, or structural collapse of an embankment intended to contain water. Failure can produce severe flooding where defenses had concentrated exposure.
Green infrastructure : A network of natural and designed green spaces that manages water and provides environmental benefits. Its flood-control performance depends on scale, placement, and maintenance.
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