Henning Filip Hjulström (6 October 1902 – 26 March 1982) was a Swedish

geographer A geographer is a physical scientist, social scientist or humanist whose area of study is geography, the study of Earth's natural environment and human society, including how society and nature interacts. The Greek prefix "geo" means "earth" a ...

. Hjulström was professor of

geography Geography (from Ancient Greek ; combining 'Earth' and 'write', literally 'Earth writing') is the study of the lands, features, inhabitants, and phenomena of Earth. Geography is an all-encompassing discipline that seeks an understanding o ...

Uppsala University Uppsala University (UU) () is a public university, public research university in Uppsala, Sweden. Founded in 1477, it is the List of universities in Sweden, oldest university in Sweden and the Nordic countries still in operation. Initially fou ...

from 1944, and in 1949, when the subject of geography was split, he became professor of

Physical Geography Physical geography (also known as physiography) is one of the three main branches of geography. Physical geography is the branch of natural science which deals with the processes and patterns in the natural environment such as the atmosphere, h ...

. Filip Hjulström's doctoral thesis, "The River Fyris", contained one of the first quantitative studies of geomorphological processes ever published. It was a study of

sediment transport Sediment transport is the movement of solid particles (sediment), typically due to a combination of gravity acting on the sediment, and the movement of the fluid in which the sediment is entrained. Sediment transport occurs in natural systems wh ...

and

soil erosion Soil erosion is the denudation or wearing away of the Topsoil, upper layer of soil. It is a form of soil degradation. This natural process is caused by the dynamic activity of erosive agents, that is, water, ice (glaciers), snow, Atmosphere of Ea ...

in the drainage area of the river Fyrisån, based on a daily water sample that he took as he passed on the way to the department, and analyzed for suspended sediment content. His students followed in the same vein, making quantitative studies of mass transport (

Anders Rapp Anders Rapp (1927–1998) was a Swedish geomorphologist and geographer who pioneered quantitative geomorphological approach on Peristalsis, mass movements and erosion. He was the first to make a comprehensive study on avalanche boulder tongues. ...

), fluvial transport (

Åke Sundborg Åke Sundborg (15 October 1921 – 23 May 2007) was a Swedish geographer and geomorphologist known for his contributions to the hydrology and geomorphological dynamics of rivers. He was active at Uppsala University where he studied under the ...

), delta deposition (

Valter Axelsson Axel Gunnar Valter Axelsson (born 30 May 1924) was a Swedish geomorphologist and educator who made significant contributions to the understanding of the delta sedimentology Sedimentology encompasses the study of modern sediments such as sand, si ...

), and coastal processes ( John O. Norrman). This developed into "the Uppsala School of

". Hjulström is most known for creating the Hjulström curve, which describes the thresholds for

erosion Erosion is the action of surface processes (such as Surface runoff, water flow or wind) that removes soil, Rock (geology), rock, or dissolved material from one location on the Earth's crust#Crust, Earth's crust and then sediment transport, tran ...

and deposition of particles in running water.Hjulström's Diagram

Idaho State University Idaho State University (ISU) is a Public university, public research university in Pocatello, Idaho, United States. Founded in 1901 as the Academy of Idaho, Idaho State offers more than 250 programs at its main campus in Pocatello and locations ...

Family

Hjulström's son

Lennart Hjulström Lennart Hjalmar Hjulström (18 July 1938 – 3 July 2022) was a Swedish actor and director. He was married to Gunilla Nyroos and father of Niklas and Carin Hjulström. His father was Filip Hjulström. Partial filmography *1983: '' Berget ...

went on to become a notable Swedish actor that had two children with Ulla (née Söderdal), Niklas Hjulström and Carin Hjulström, also actors. Lennart also had a child, Hannah Nyroos with his current wife, Gunilla Nyroos, an actress.

References

External links

Filip Hjulström
(Swedish) Swedish geographers 1902 births 1982 deaths Process geomorphologists Academic staff of Uppsala University Swedish geomorphologists Swedish hydrologists Sedimentologists 20th-century Swedish geographers Members of the Royal Swedish Academy of Sciences {{geographer-stub