Changes in water regime of the River Ural basin

Сивохип, Ж. Т.; Pavleychik, V. M.; Чибилев, А. А.

doi:10.31857/s0869-56524885545-549

Cited by 3 publications

(1 citation statement)

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“…Сходная ситуация наблюдается и в структуре стока на прилегающей части полого-волнистой равнины, сформировавшейся на основе древнего зауральского пенеплена. Подобные участки представляют интерес с позиций формирования стока главной реки с учетом наблюдаемых однонаправленных тенденций и многолетних фаз различной водности [1]. В этой связи важна фиксация возможных признаков изменения условий формирования стока, обусловленных как естественными, так антропогенными причинами.…”

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Landscape‐hydrological phenomenon of the formation of floating islands on Lake Chebarkul (Davletovo) in the Ural River basin, Russia

Pavleychik

Sivokhip

2022

Ûg Ross.: èkol. razvit.

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Aim. To record factually the development of floating islands on Lake Chebarkul (Davletovo) as a landscape‐hydrological phenomenon in the Ural River basin and in the Southern Trans‐Urals, to determine the mechanisms of formation and to identify the specific features of their morphostructure, intra‐annual movements and long‐term dynamics.Materials and Methods. Based on images of high (2003–2020) and medium (1972–2020) spatial resolution, an analysis was made of qualitative and quantitative indicators reflecting the long‐term and intra‐ annual dynamics of the state of floating islands (mats) and coastal thickets of macrophytes («splavina» or «labza» in Russian).Results. It was established that the main source of material for the islands were the coastal thickets of macrophytes at the site of the confluence of watercourses into the lake (Yangelka River and Mogak Crrek), which periodically (during periods of extreme spring floods) lose contact with coastal shallow waters and are carried into the lake. The high variability of the states and the dynamism of the displacement of the islands, as well as the tendency to reduce the number and area of the islands and coastal thickets of macrophytes, caused, among other factors, by the consequences of the anomalous summer flood of 2013, were revealed. Being in an unfixed state, floating islands drift along the water area of the lake for considerable distances, reaching 10–15 km or more during the ice‐ free period of the year. The main driving force is the wind, which causes prevailing alongshore displacements of the islands: as a result of collisions, they are reduced in size and acquire a rounded shape in plan.Conclusion. Throughout the historical period, floating islands around the world have been perceived as a landscape phenomenon that deserves protection and rational use. Lake Chebarkul with floating islands is of undoubted interest as an object of geographical, hydrological, ecological and biological research.

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Landscape‐hydrological phenomenon of the formation of floating islands on Lake Chebarkul (Davletovo) in the Ural River basin, Russia

Pavleychik

Sivokhip

2022

Ûg Ross.: èkol. razvit.

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Geoecological Problems in the Ural Basin Under a Changing Climate

Kudelina,

Leontyeva,

Fatyunina

et al. 2024

Springer Geology

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Modern ecological problems of restoration and conservation of the sturgeon population in the Ural River basin

Ахмеденов

Чибилев

2023

Ûg Ross.: èkol. razvit.

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Aim. The aim of this study was to conduct an analysis of long‐term changes in the number of sturgeon populations and its relationship with the fishing regime and the current state of the Ural River basin, as well as develop measures for the conservation and restoration of their resources.Discussion. Six sturgeon species inhabit the waters of the Ural River basin: Huso huso Linnaeus, 1758; Acipenser gueldenstaedtii Brandt & Ratzeburg, 1833; Acipenser persicus Borodin, 1897; Acipenser stellatus Pallas, 1771; Acipenser nudiventris Lovetsky, 1828 and Acipenser ruthenus, 1758. The degradation of the geosystems of the Ural River basin and the Caspian Sea due to changes in the hydrological regime, increased exploitation of oil and gas fields, as well as poaching has led to a decrease in the number of sturgeons. Moreover, the areas used for the development of petroleum hydrocarbons and the development of related infrastructure coincide with the main areas for feeding and migration of sturgeon and other commercial fish species. The Ural River is the only one in Europe with unregulated lower and middle reaches, thanks to which, until the 90s of the last century, favourable conditions were maintained for the natural reproduction of sturgeon and other fish species. In world practice, the development of commercial sturgeon breeding and reproduction of livestock in regional natural reservoirs provide a promising direction for the preservation of the unique sturgeon gene pool. At the same time, the principal role in the formation of the number and species composition of sturgeons, is given to natural reproduction. In the Ural River Basin, there are opportunities to restore the sturgeon population through a combination of natural reproduction and artificial farming.Conclusions. Despite a slight increase in the occurrence of sturgeons in recent decades, the state of their populations requires special conservation measures. It is necessary to develop joint measures for the protection and reproduction of fish stocks at the interstate level.

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Changes in water regime of the River Ural basin

Cited by 3 publications

References 1 publication

Landscape‐hydrological phenomenon of the formation of floating islands on Lake Chebarkul (Davletovo) in the Ural River basin, Russia

Landscape‐hydrological phenomenon of the formation of floating islands on Lake Chebarkul (Davletovo) in the Ural River basin, Russia

Geoecological Problems in the Ural Basin Under a Changing Climate

Modern ecological problems of restoration and conservation of the sturgeon population in the Ural River basin

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