Geotextile bag revetments for large rivers in Bangladesh

There are many theories pertaining to the progression of ice covers in rivers fed by frazil slush and floes but very few have been examined critically by comparing them with field data. In this paper the existing theories on dynamic ice cover progression are reviewed, an additional one is proposed, and they are classified according to the physical mechanisms that are involved. Finally, they are compared with some existing field data for large rivers. The data are extremely scarce and difficult to obtain because of the costs involved and the dangers in traveling over thin ice when the ice cover is being formed.It is usually easier to get only the critical values of parameters giving the limits of ice cover progression. In this paper, complete data were taken from the St. Lawrence River, the Beauharnois Canal, and the La Grande Rivière where the ice thicknesses along with the flow parameters have been measured.In these cases the existing data are adequate, so they could be grouped to explain the various mechanisms involved and to obtain numerical values for their quantitative determination. Key words: glaciology, river ice, ice dynamics, fluvial processes, ice hydraulics.

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Large rivers, slow drainage rearrangements: The ongoing fluvial piracy of a major river by its tributary in the Branco river basin - Northern Amazon

Journal of South American Earth Sciences ◽

10.1016/j.jsames.2021.103598 ◽

2021 ◽

pp. 103598

Author(s):

André Augusto Rodrigues Salgado ◽

Breno Marent ◽

Rodrigo Wagner Paixão

Keyword(s):

River Basin ◽

Large Rivers ◽

Major River

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Assessment of transfer patterns and origins of in-channel wood in large rivers using repeated field surveys and wood characterisation (the Isère River upstream of Pontcharra, France)

Geomorphology ◽

10.1016/j.geomorph.2016.07.020 ◽

2017 ◽

Vol 279 ◽

pp. 27-43 ◽

Cited By ~ 14

Author(s):

Hervé Piégay ◽

Bertrand Moulin ◽

Cliff R. Hupp

Keyword(s):

Large Rivers ◽

Field Surveys

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A stonefly species extinct in Europe (Taeniopteryx araneoides Klapalek, 1902, Taeniopterygidae, Plecoptera) is thriving in the Irtysh River in West Siberia and North Kazakhstan

Zootaxa ◽

10.11646/zootaxa.4247.2.5 ◽

2017 ◽

Vol 4247 (2) ◽

pp. 141 ◽

Cited By ~ 1

Author(s):

OLEG E. KOSTERIN ◽

NAZYMGUL AKIMBEKOVA ◽

VLADIMIR V. DUBATOLOV ◽

IGNAC SIVEC

Keyword(s):

Anthropogenic Impacts ◽

West Siberia ◽

Large Rivers ◽

Geographical Range ◽

Central Siberia ◽

Irtysh River ◽

The Irtysh River

Taeniopteryx araneoides Klápalek, 1902, a stonefly species with brachypterous males, known historically from the Danube, Elbe, and Dniester rivers, but considered to be extinct at least in Europe for more than a century. This species has also been doubtfully reported from Krasnoyarsk, Central Siberia. However, we report this species to be still thriving in the Irtysh River at the cities of Omsk (West Siberia, Russia) and Pavlodar (North Kazakhstan). The occurrence of this species reported least fifty years ago from the Yenisey River at Krasnoyarsk, Russia is considered possible. Unlike the widespread Palaearctic T. nebulosa (Linnaeus, 1758) that occurs in a broad range of stream types, T. araneoides is a potomon species, apparently confined to large rivers. In this habitat, it appears vulnerable to anthropogenic impacts and may be unable to compete with T. nebulosa. The construction of dams and reservoirs has apparently extirpated T. araneoides from most of its former geographical range.

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