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The Hjulström curve, named after Filip Hjulström (1902–1982), is a graph used by hydrologists and geologists to determine whether a river will erode, transport, or deposit sediment. It was originally published in his doctoral thesis "Studies of the morphological activity of rivers as illustrated by the river Fyris. [1]" in 1935. The graph ...
Some groundwater finds openings in the land surface and emerges as freshwater springs. In river valleys and floodplains, there is often continuous water exchange between surface water and ground water in the hyporheic zone. Over time, the water returns to the ocean, to continue the water cycle. The ocean plays a key role in the water cycle.
As rivers flow downstream, they eventually merge to form larger rivers. A river that feeds into another is a tributary, and the place they meet is a confluence. [4] Rivers must flow to lower altitudes due to gravity. [3] The bed of a river is typically within a river valley between hills or mountains.
A riverscape [1] (also called river landscape) [2] comprises the features of the landscape which can be found on and along a river. Most features of riverscapes include natural landforms (such as meanders and oxbow lakes ) but they can also include artificial landforms (such as man-made levees and river groynes ).
GCSE Bitesize was launched in January 1998, covering seven subjects. For each subject, a one- or two-hour long TV programme would be broadcast overnight in the BBC Learning Zone block, and supporting material was available in books and on the BBC website. At the time, only around 9% of UK households had access to the internet at home.
The south bank of the mouth of the River Tees has the 62-megawatt Teesside Offshore Wind Farm, built 2011–13. [29] Near the mouth of the River Tees is the large dry dock facility of ABLE UK, named TERRC (Teesside Environmental Reclamation and Recycling Centre), used to dismantle or oil rigs and other large vessels. [30]
One highly variable component to river ecosystems is food supply (biomass of primary producers). [39] Food supply or type of producers is ever changing with the seasons and differing habitats within the river ecosystem. [39] Another highly variable component to river ecosystems is nutrient input from wetland and terrestrial detritus. [39]
High Force is a waterfall on the River Tees, near Middleton-in-Teesdale, Teesdale, England. [1] The waterfall is within the North Pennines Area of Outstanding Natural Beauty and the European Geopark. The whole of the River Tees plunges 70 feet (21 m) [2] over a precipice (an almost vertical cliff edge) in two stages. After heavy rainfall the ...