rapid

Rapids are sections of a river where the river bed has a relatively steep slope. Its intensity ranges from a scale of 1-8, with 1 being the most navigable and 8 being the least gradient, causing an increase in water velocity and turbulence. Rapids are hydrological features between a run (a smoothly flowing part of a stream) and a cascade. Rapids are characterised by the river becoming shallower with some rocks exposed above the flow surface. As flowing water splashes over and around the rocks, air bubbles become mixed in with it and portions of the surface acquire a white colour, forming what is called "whitewater". Rapids occur where the bed material is highly resistant to the erosive power of the stream in comparison with the bed downstream of the rapids. Very young streams flowing across solid rock may be rapids for much of their length. Rapids cause water aeration of the stream or river resulting in better water quality. Rapids are categorized in classes, generally running from I to VI. A Class 5 rapid may be categorized as Class 5.1-5.9. While class I rapids are easy to navigate and require little maneuvering, class VI rapids pose threat to life with little or no chance for rescue.
Norway. - Waterfall in Norway ...
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Norway.

Added 3 weeks ago by Grażyna

348

Niagara Falls - Niagara Falls, river
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Niagara Falls

Added 2 months ago by sandra

197

Niagara Falls. - Niagara Falls on the border between USA and Canada.
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Niagara Falls.

Added 2 months ago by Zeta

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Waterfalls on Niagara. - Waterfalls on Niagara.
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Waterfalls on Niagara.

Added 2 months ago by Zeta

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An upset river. - An upset river among the forest.
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An upset river.

Added 2 months ago by Zeta

44

seaside landscape - sea, waves, sea rocks
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seaside landscape

Added 2 months ago by sandra

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BAJKOWY VIEW - summer, holidays, rest
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BAJKOWY VIEW

Added 3 months ago by Ada

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BAJKOWY VIEW - Holidays, nature, rest
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BAJKOWY VIEW

Added 3 months ago by Ada

267

The inflow of Ottawa - The turn of the tributary of the Ottawa River
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The inflow of Ottawa

Added 4 months ago by Xam

105

Wild river - colorful jigsaw puzzle
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Wild river

Added 4 months ago by andi

121

Mountain river - Mountains, forest, stones, river, autumn
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Mountain river

Added year ago by Jaś

392

Niagara Falls - A view of the Niagara Falls on the Canadian side
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Niagara Falls

Added year ago by Xam

92

Unique nature - Unique nature, landscape
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Unique nature

Added year ago by Janek

496

Piękna zima - Najpiękniejsze miejsca na świecie - zimą
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Piękna zima

Added year ago by Monika

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Górski strumień w lesie - Górski strumień i zielony las
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Górski strumień w lesie

Added over a year ago by Monika

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Piękne widoki

Added over a year ago by Monika

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przejście górskie - góry,skały,rzeka,ludzie,pomost,
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przejście górskie

Added over a year ago by wieslawa

288

Jesienny pejzaż - Jesienny las i strumień
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Jesienny pejzaż

Added over a year ago by Ewa By

293

Brazylia,wodospady Iguasu - wodospady,kładka,ludzie,drzewa
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Brazylia,wodospady Iguasu

Added over a year ago by wieslawa

143

Z serii krajobrazy - Szalona natura może zrobić takie pejzaże:)
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Z serii krajobrazy

Added over a year ago by Marysia

251

dziewczynka i wodospad - piękne miejsca w Polsce
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dziewczynka i wodospad

Added over a year ago by Halinka

324

potoki i strumienie - głazy,kamienie,woda,liście,mech
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potoki i strumienie

Added over a year ago by wieslawa

132

szum górskiego potoku - las,drzewa,kamienie,woda
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szum górskiego potoku

Added over a year ago by wieslawa

154

potok górski - głazy,woda,zieleń,drzewa,liście
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potok górski

Added over a year ago by wieslawa

162

górski potok - potok,las,drzewa suche,krzewy,głazy
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górski potok

Added over a year ago by wieslawa

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potok górski - potok,góry,las,suche drzewa
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potok górski

Added over a year ago by wieslawa

84

homolewawóz - homole wąwóz w jaworkach
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homolewawóz

Added over a year ago by górymojepieniny

330

uroki natury - rzeka,kaskada,drzewa,krzewy,woda
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uroki natury

Added over a year ago by wieslawa

337

Krajobraz Górski - Krajobraz Górski z Wodospadem
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Krajobraz Górski

Added over a year ago by Natalia ;)

23

Krajobraz Górski - Krajobraz Górski z Wodospadem
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Krajobraz Górski

Added over a year ago by Natalia ;)

39