Cumulative flow
By collecting flow a river in is Iceland referred resulting from various source streams and tributaries feeding. The origin is not entirely clear. Good examples of this are rivers like the rivers of the same name, Norðurá in Mýrasýsla and Norðurá in Skagafjörður or the Markarfljót in southern Iceland.
The level of precipitation is reflected very directly in these rivers, which is why they can swell considerably in summer rain or thaw. When it is dry, however, their water level quickly becomes low.
Such rivers are unpredictable and may tend to U. too strong floods with 10 - 100 times the average amount of water. Then the water becomes cloudy at the same time.
Frosty weather can quickly freeze overflows. When the ice thaws, however, a high water level can arise and make the rivers raging and dangerous at the same time.
Due to the high water, the vegetation does not reach the water surface at normal level.
Dense bedrock promotes the formation of such rivers.
See also
Individual evidence
- ↑ after: Ari Trausti Guðmundsson , Land im Werden. An outline of the geology of Iceland. Reykjavík, Vaka-Helgafell, 1996, p. 24 f.