Dynamics of river bed processes of the Ural River in Western Kazakhstan

2014 ◽  
Vol 9 (4) ◽  
pp. 457-463
Author(s):  
N. Kh. Sergaliev ◽  
K. M. Akhmedenov
Keyword(s):  
Horizontal Displacement ◽  
Channel Processes ◽  
Erosion Risk ◽  
Related Data ◽  
Bed Deformation ◽  
River Bed ◽  
Main River ◽  
Medium Level ◽  
West Kazakhstan ◽  
First Time

A retrospective analysis of river bed deformation over a 34-year period has been carried out for the first time for the Ural River in West Kazakhstan, in different environmental conditions. Horizontal shifts of the Ural riverbed have been defined according to space shots made in 2012. Erosion risk, as a result of horizontal displacement of the river bed has been determined in West Kazakhstan. A geomorphologic description of the Ural River bed and floodplain, and the dynamics of channel processes in the river within West Kazakhstan are given. The probable pattern of channel realignments for the Ural River has been determined. The paper describes the results of map compilation and related data consolidation with respect to the horizontal river bed shifts in West Kazakhstan, and includes a review of characteristics of the hydrologic and hydrochemical regimes of the river. The main river bed types, which are typical of flat terrain, are also discussed. West Kazakhstan is a region where there is medium-level ecologic stress on the river beds and floodplains.

scholarly journals Geopolitical Aspects of Channel Processes

2011 ◽  
Author(s):  
Keyword(s):  
Negative Impact ◽  
Eastern Region ◽  
Channel Processes ◽  
Republic Of China ◽  
River Bed ◽  
Boundary Position ◽  
State Boundary ◽  
Far Eastern ◽  
Water Work

When using the Far-Eastern Region as a study case the paper deals with the issues of political tensions between neighboring states (Russia and People’s Republic of China) caused by coinciding of state boundaries with rivers. Main forms of negative impact of channel processes that cause reconsideration (demarcation) of the boundary position have been described. The role of water work facilities that influence the river bed regime transformation and, consequently, fairway/state boundary position alteration is being assessed.

scholarly journals CARACTERIZAÇÃO FISIOGRÁFICA DA BACIA HIDROGRÁFICA DO CÓRREGO DO MALHEIRO, NO MUNICÍPIO DE SABARÁ – MG

Irriga ◽  
2009 ◽  
Vol 14 (3) ◽  
pp. 398-412
Author(s):  
Wellington Marçal de Carvalho ◽  
Edson De Oliveira Vieira ◽  
Jussara Machado Jardim Rocha ◽  
Alan Kenio dos Santos Pereira ◽  
Tiago Vinicius Batista do Carmo
Keyword(s):  
Water Resources ◽  
Hydrological Cycle ◽  
National Policy ◽  
Drainage Density ◽  
Federal Law ◽  
Effective Measure ◽  
River Bed ◽  
Main River ◽  
Equilibrium Relationships ◽  
The City

CARACTERIZAÇÃO FISIOGRÁFICA DA BACIA HIDROGRÁFICA DO CÓRREGO DO MALHEIRO, NO MUNICÍPIO DE SABARÁ – MG  Wellington Marçal de Carvalho; Edson de Oliveira Vieira; Jussara Machado Jardim Rocha; Alan Kênio dos Santos Pereira; Tiago Vinícius Batista do CarmoInstituto de Ciências Agrárias, Universidade Federal de Minas Gerais, Montes Claros, MG  [email protected]  1 RESUMO A Lei Federal 9.433, de 8 de janeiro de 1997, instituiu a Política Nacional de Recursos Hídricos e estabeleceu o Sistema Nacional de Gerenciamento de Recursos Hídricos e, ao definir princípios básicos para uma gestão eficaz das águas, no Brasil, adotou a bacia hidrográfica como unidade de planejamento de políticas públicas, a fim de garantir o direito ao acesso à água de boa qualidade para as atividades produtivas, bem como, para sua utilização pelas gerações futuras. Sabe-se que uma bacia hidrográfica é um sistema complexo e sofre influência de fatores internos e externos, que podem comprometer as diversas relações de equilíbrio do mesmo, e, possivelmente, culminar em sua degradação. O presente trabalho teve como objetivo caracterizar a fisiografia da bacia hidrográfica do córrego do Malheiro, no município de Sabará – MG. Para compreender os processos biológicos, físicos e químicos que interferem no ciclo hidrológico dessa unidade geográfica foram estudados os parâmetros fisiográficos: área de drenagem, perímetro, comprimento do leito principal, rede de drenagem, densidade de drenagem, forma da bacia hidrográfica, número de ordem, declividade equivalente, tempo de concentração, extensão do percurso principal e amplitude altimétrica. Os resultados demonstraram a necessidade de medidas efetivas de recuperação e preservação da cobertura vegetal, além de investimentos em educação ambiental para a população. UNITERMOS: Bacia de drenagem. Morfometria. Malheiro, córrego do – Sabará/MG.  CARVALHO, W. M. de; VIEIRA, E. de O.; ROCHA, J. M. J.; PEREIRA, A. K. dos S.; CARMO, T. V. B. do. physiographic characterization of Malheiro stream watershed in the city of Sabará– MG, brazil  2 ABSTRACT The Brazilian Federal Law 9433, from January 8th, 1997, regulated  the National Policy for Water Resources and established the National System for Water Resources Management, and, by defining basic principles for an efficient water management in Brazil, it adopted the watershed as a planning unit for public policy, in order to guarantee the rights to access good quality water for productive activities, and also for the future generations’ use. It is known that a watershed is a complex system that is influenced by internal and external factors that may compromise its several equilibrium relationships, and, possibly, result in its degradation. The goal of the present work was to characterize the physiography of  the Malheiro stream watershed, located in the city of Sabará, MG. In order to understand the biological, physical and chemical processes that interfere in the hydrological cycle of the geographic unit, the following physiographic parameters were studied: drainage area, perimeter, main river bed length, drainage network, drainage density, hydrographic basin shape, order number, equivalent declivity, concentration time, main course extension, and altimetric amplitude. The results demonstrated the necessity for effective measure recovery and preservation of the vegetation cover, and also investments on environmental education for thepopulation.            KEYWORDS: Draining bank river. Morphometry. Malheiro stream watershed - Sabará/MG.

scholarly journals Variation on sandbar of tributary in Xiaolangdi Reservoir on Yellow River, China

2018 ◽  
Vol 246 ◽  
pp. 01019
Author(s):  
Tao Li ◽  
Jun-hua Zhang ◽  
Guoming Gao ◽  
Huaibao Ma
Keyword(s):  
Flood Control ◽  
Yellow River ◽  
Deposition Process ◽  
Utilization Efficiency ◽  
Comprehensive Utilization ◽  
Water And Sediment ◽  
River Bed ◽  
Main River ◽  
Effective Use ◽  
Xiaolangdi Reservoir

Sandbar development would stop the water and sediment exchange between main river and tributary and even influence the normal reservoir opeartion. From the surveyed data of reservoir built many years ago, it shows that when there is a bar in tributary mouth, the tributary volume below the bar will become nullification during the period of flood control or water and sediment regulation of reservoir. There are more tributaries in Xiaolangdi reservoir than the others that it occupies 41.3% of the total initial volume of tributary volume. Obviously, the effective use of tributary volume has been important influenced by comprehensive utilization efficiency of reservoir scheduling, such as flood control, sedimentation reduction and comprehensive utilization. Results of Xiaolangdi Reservoir mobile-bed physical model experiments show that tributary is equivalent to lateral extension of river bed, the tributary intrusion deposition process have strongly relations with the factors, such as original topography, river bed deposition shape and its regime, process with input discharge and input sediment, and method of reservoir regulation. The variation trends of main river and tributary terrain forecasted by model test are basically in accordance with field surveyed data. The results could be used for research, design, and forecasting of reservoirs in sediment-laden river.

Redescription of Trichomycterus striatus (Meek & Hildebrand, 1913) (Siluriformes: Trichomycteridae), with notes on its geographic distribution

Zootaxa ◽  
2018 ◽  
Vol 4420 (4) ◽  
pp. 530 ◽  
Author(s):  
ARTURO ANGULO ◽  
CARLOS DONASCIMIENTO ◽  
OSCAR M. LASSO-ALCALÁ ◽  
ALDO FARAH-PÉREZ ◽  
FRANCISCO LANGEANI ◽  
...  
Keyword(s):  
Geographic Distribution ◽  
River Basins ◽  
Central American ◽  
South American ◽  
Anterior Section ◽  
Main River ◽  
The Pacific ◽  
Infraorbital Canal ◽  
Coloration Pattern ◽  
First Time

Trichomycterus striatus is herein redescribed, based on examination of the types and recently collected specimens, and its geographic distribution is updated. This species can be diagnosed from all other northeastern South American congeners by its variable coloration pattern consisting of a yellowish to light brown background with a black lateral band and/or small dark brown spots on sides or uniformly light brown and by the following combination of characters: teeth conical arranged in three to four irregular rows in both jaws; anterior section of infraorbital canal (sensory pores i1 and i3) present; sensory pores s6 paired, 11–23 opercular odontodes; 27–44 interopercular odontodes; seven to eight pectoral-fin branched rays; 36–37 free vertebrae; 12–14 ribs; cleithrum pierced by several foramina; and caudal fin truncate to rounded. Trichomycterus striatus occurs from southern Costa Rica [from the Pirrís (herein reported for the first time), Térraba and Coto River basins] to eastern Panama (in most of the main river basins in both the Pacific and Atlantic versants), being the sole representative of the family in lower Central American waters. 

scholarly journals Natural and Anthropogenic Factors Impact on the Amur River Bed Passage Ability near Khabarovsk during floods passing

2020 ◽  
pp. 66-82
Author(s):  
Keyword(s):  
Water Level ◽  
Construction Cost ◽  
Anthropogenic Factors ◽  
Channel Processes ◽  
Amur River ◽  
Water Flows ◽  
River Bed ◽  
The Amur River ◽  
The Given ◽  
Natural And Anthropogenic Factors

The article discusses the range of the Amur River maximal annual levels and water flows near Khabarovsk over the whole period of observations (1896–2019), quantity of outstanding and catastrophic floods. In compliance with references, the articles considered the main characteristics forming the channel processes at the given reach of the river. We have estimated the natural and anthropogenic factors impact on the water flows and levels passage ability in case of catastrophic floods and increasing of the protective facilities’ construction cost due to the water level extreme increase caused by anthropogenic factors. We have proposed a method of the maximal water level forecasting near the Khabarovsk water hub.

scholarly journals MODELING OF A WATER-SALT BALANCE OF A RIVER POOL WITH DEVELOPED IRRIGATED AGRICULTURE

2020 ◽  
Vol 1 (5) ◽  
pp. 65-70
Author(s):  
G.Kh. Ismaiylov ◽  
◽  
N.V. Muraschenkova ◽  
Keyword(s):  
Moisture Content ◽  
Groundwater Level ◽  
Irrigated Agriculture ◽  
Salt Balance ◽  
Aeration Zone ◽  
River Bed ◽  
Main River ◽  
Horizontal Flows ◽  
Water Salt ◽  
Water And Salt Balance

The construction of a mathematical model of the water-salt balance for river basins with the predominant development of irrigated agriculture is considered. The structures of the water and salt balance of the irrigated territory and the balance of the main river bed within it are given. It has been established that if the inflow and outflow of water and salts dissolved in it are caused by its horizontal flows, then the evaporation and accumulation of water (salts) in the aeration zone and groundwater are caused by its vertical flows.This leads to the need to consider instead of the general equation of the water (salt) balance of the irrigated territory of its modifications for the distinguished three vertical zones, that is, “the surface of the territory – aeration zone – groundwater zone”. During the operation of the algorithm, the following are successively determined: elements of the water and salt balance of the irrigated territory and the riverbed; groundwater level as a result of the intake of salts with in-person flow of local tributaries; filtration losses from the channels and the lateral residue of the inflow; moisture content in the aeration zone after irrigation water and precipitation enters it; groundwater level after water from the aeration zone; moisture content in the aeration zone after the influx of groundwater into it; the outflow of groundwater into the riverbed and the final mineralization of water in the aeration zone.

scholarly journals Geography of braided rivers within the territory of Russia

2019 ◽  
Vol 151 (6) ◽  
pp. 20-34
Author(s):  
R. S. Chalov ◽  
E. R. Chalova
Keyword(s):  
River Channels ◽  
Channel Processes ◽  
Channel Changes ◽  
Braided Rivers ◽  
Meandering Channels ◽  
Russian Scientific ◽  
Different Types ◽  
Incised Channel ◽  
Structural Levels ◽  
First Time

The paper represents the geographical analysis of braided river channels development and distribution for the first time in Russian Scientific Literature. On asmall-scale map of Russia we display the distribution of braided channels on small and middle mountain, semi-mountain and plain rivers, in free and limited conditions of channel changes development (on rivers with wide floodplain and incised channel), which are determined by geologic-geomorphologic structure of the territory. On the large and largest rivers we distinguish braided reaches of different morphological types according to the MSU classification (single, conjugated, one-sided and alternate one-sided, sub-parallel branches, etc) and also bifurcations as aconsequence of meander cut-off which complicate the morphology of straight and meandering channels. Separately we display bifurcations on the other structural levels of channel processes development point mid-channel bifurcations on mountain reaches of large rivers, split channels and deltaic braided reaches. The causes of different types of braided channels development in different natural conditions are described.

scholarly journals Revision of the banding sequence pool and new data on chromosomal polymorphism in natural populations of Chironomus agilis Shobanov et Djomin, 1988 (Diptera, Chironomidae)

2021 ◽  
Vol 15 (4) ◽  
pp. 527-541
Author(s):  
Veronika V. Golygina ◽  
Oksana V. Ermolaeva
Keyword(s):  
Qualitative Analysis ◽  
Natural Populations ◽  
Chromosomal Polymorphism ◽  
B Chromosomes ◽  
Medium Level ◽  
Banding Sequence ◽  
First Time ◽  
Two Populations

Quantitative and qualitative analysis of chromosomal polymorphism in 19 natural populations of Ch. agilis had been performed. Most studied populations showed a medium level of chromosomal polymorphism: on average 45±3.0% of specimens are heterozygotes with 0.52±0.01 heterozygotic inversion per larvae. Besides inversions, B-chromosomes were found in two populations. The total number of banding sequences found in banding sequence pool of Ch. agilis is 16. Three banding sequences – p’agiB3, p’agiD3, p’agiF3 – are described for the first time.

scholarly journals METHODS OF IMPROVING THE EFFICIENCY OF MONITORING OF CHANNEL DEFORMATIONS OF MOUNTAIN RIVERS NEAR BUILT-IN SETTLEMENTS: ON THE EXAMPLE OF THE BUKTYRMA RIVER

2018 ◽  
Vol 44 (1) ◽  
pp. 28-35 ◽  
Author(s):  
Talgat TAUKENOV ◽  
Kulchikhan DZHANALEEVA ◽  
Zhuldyz YERZHANOVA
Keyword(s):  
Public Space ◽  
Morphological Characteristics ◽  
Control Measures ◽  
Mountain Rivers ◽  
Channel Processes ◽  
Channel Deformations ◽  
Geoinformation Systems ◽  
The Earth ◽  
River Bed ◽  
Scientific Justification

The results of research on the development of methods for increasing the efficiency of monitoring the channel deformations of mountain rivers using the methods of aerospace studies of the Earth and geoinformation systems are presented. Examples are given of estimating channel deformations, compiling morphological characteristics of the valley, floodplain and river bed, determining the scheme for the development of channel processes using public space imagery, scientific justification for erosion control measures.

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