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A pensive Cooplacurripa River, NSW Rapids in Mount Robson Provincial Park. Unidirectional water flow is the key factor in lotic systems influencing their ecology. Streamflow can be continuous or intermittent, though. Streamflow is the result of the summative inputs from groundwater, precipitation, and overland flow.
Rapids are sections of a river where the river bed has a relatively steep gradient, causing an increase in water velocity and turbulence. Flow, gradient, constriction, and obstacles are four factors that are needed for a rapid to be created.
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Injuries while swimming are rare; self-rescue is usually easy but group assistance may be required to avoid long swims. Rapids that are at the lower or upper end of this difficulty range are designated Class III- or Class III+ respectively. Class IV: Advanced Intense, powerful but predictable rapids requiring precise boat handling in turbulent ...
Whitewater, large waves, continuous rapids, large rocks and hazards, maybe a large drop, precise maneuvering, often characterized by "must make" moves, i.e. failure to execute a specific maneuver at a specific point may result in serious injury or death, Class 5 sometimes expanded to Class 5+ that describes the most extreme, runnable rapids ...
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The River Continuum Concept (RCC) is a model for classifying and describing flowing water, in addition to the classification of individual sections of waters after the occurrence of indicator organisms. [1]
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