scholarly journals Hydraulic calculation of irrigation settling tanks of Amu Darya irrigation systems

2021 ◽  
Vol 264 ◽  
pp. 03027
Author(s):  
Kenesbay Baimanov ◽  
Kadirbek Nazarbekov ◽  
Ruslan Baimanov ◽  
Sharap Tazhibayev
Keyword(s):  
Irrigation System ◽  
Hydraulic Calculation ◽  
Normal Operation ◽  
Hydroelectric Power Station ◽  
Left Bank ◽  
Hydroelectric Power ◽  
Irrigation Systems ◽  
Simple Method ◽  
Modes Of Operation ◽  
Amu Darya

The Amu Darya river carries a large amount of up to 15 kg/m3 of suspended matter containing up to 85-90% suspended and 10-15% bottom sediments, which pose a serious threat to the hydroelectric power station and irrigation systems operating in its basin. In case of dam water intake, head sump tanks are provided in the composition of waterworks. So, in the composition of Right-Bank and Left-Bank, sedimentation tanks with mechanical cleaning to protect the channels were built at the Takhiatash hydroelectric complex Kaskelenskaya and Selinsky irrigation system. It is established that the hydraulic and alluvial modes of operation of these settling tanks depend on the water, alluvial, and backwater modes of operation Takhiatash waterworks. It is noted that due to low water conditions, this hydroelectric power plant operated for a significant part of the year with fully closed gates in all spans, producing intensive siltation of the upper stream. These processes led to a change in the alluvial mode of operation of the settling tanks. At the same time, due to low water and excessive design dimensions, in the first years of operation, these settling tanks were heavily silted up, the bottom mark rose to 17.2 m (above the design 165 m). Properly designed settling tanks should prevent siltation of main and distribution channels while respecting the transport capacity of the channels located below. It is proved that some well-known methods for calculating settling tanks, due to their complexity and bulkiness, cannot be used in calculating siltation modes of settling tanks under operational conditions that require simplification or finding a simpler relationship. A simple method is developed for calculating the dynamics of sediment deposition in irrigation sump tanks based on the probability of turbulent pulsation motion. Recommended: for normal operation of irrigation septic tanks, it is necessary to carry out systematic monitoring of the output turbidity and intensity of treatment, as well as water supply according to the water consumption schedule.

scholarly journals The plant communities of classes Hydrochari-lemnetea Oberd. 1967 and Potametea tx. Et Prsg. 1942 of the Labudovo okno locality (Serbia)

2008 ◽  
pp. 101-107
Author(s):  
Dubravka Polic ◽  
Ruzica Igic ◽  
Slobodanka Stojanovic ◽  
Dejana Lazic
Keyword(s):  
Plant Communities ◽  
Hydroelectric Power Station ◽  
Left Bank ◽  
Hydroelectric Power ◽  
The South ◽  
Power Station ◽  
South Eastern ◽  
Dam Building

Labudovo okno locality (50 m-84 m elevation) is situated in the south-eastern part of the edge of the Pannonian Plains, resting along the left bank of the Danube between 1982 km and 1078 km. The investigated locality is the result of rise of the Danube level after dam building of the hydroelectric power station Djerdap I. The vegetation comprises aquatic associations of the classes Hydrochari-Lemnetea Oberd. 1967 and Potametea Tx. et Prsg. 1942. The class Hydrochari-Lemnetea Oberd. 1967 includes the following phytocoenoses: Lemno-Spirodeletum W. Koch 1954, Salvinio-Spirodeletum polyrrhizae Slavnic 1956, Lemno minoris-Azolletum filiculoides Br.-Bl. 1952, Ceratophylletum demersi (So? 27) Hild 1956. The class Potametea Tx. et Prsg. 1942 includes the associations Myriophyllo-Potametum So? 1934, Nympaeetum albo-luteae Nowinski 1928, Trapetum natantis M?lleret G?rs 1960.

scholarly journals Stone Industry of Layer 2 at Ust’-Kutarey Site (North Angara Region)

2019 ◽  
Vol 18 (3) ◽  
pp. 62-73
Author(s):  
A. N. Chekha
Keyword(s):  
Bronze Age ◽  
18Th Century ◽  
Northeast Asia ◽  
River Mouth ◽  
Hydroelectric Power Station ◽  
Left Bank ◽  
Hydroelectric Power ◽  
The North ◽  
Layer 2 ◽  
Stone Industry

Purpose. There are many archaeological sites located in the North Angara region. Although this territory has been investigated since 18th century, most intensive work was done during rescue archaeological works on Boguchany hydroelectric power station in 2008–2011. One of the valuable sources of artifacts is the Kutarey site. Our work contains a brief analysis of stone industries of the Kutarey River Mouth site. The main goal of this work is to apply technical and typological analysis to mark the specificity of the stone industries of layer 2 of the Kutarey River Mouth site in comparison with the results that had been previously published on layer 3 in the context of new data of this region in terms of ceramics complexes. We introduce a previously unpublished collection of stone artifacts of layer 2 of the Kutarey River Mouth site, which significantly extends the source base of the Neolithic and Bronze Age in this region. Results. The Kutarey River Mouth site is located on the left bank of the Angara River, 15 km down from the Kezhma village, on the right bank of the Kutarey River. The location was found in 1974 by N. I. Drozdov and his squad. The site was further investigated in 2008 and in 2010 by an IAE SB RAS squad (guided by A. N. Savin). Firstly, the site was determined as a Neolithic location, but as result of 2010 excavations three Neolithic-Middle Age cultural horizons were discovered. In the context of the difficulties connected with conducting investigations in this region, namely an open location, a low stratigraphy situation, a high extend of technogenic interruption, the materials of layer 3 are most perspective due to a high grade of saturation of the artifacts and minimal technogenic interruptions. These materials belong to the Neolithic and Paleometal Era. In order to clarify cultural and chronological specificity of this complex, it is necessary to analyze materials from layer 2. The stone industry of layer 2 is represented by retouching microblades, bladelets, tools for blades, flakes, scrapers including one microscraper, bifaces, several adzes, axes, and one piercing tool. Of special interest are blade points and trihedral and tetrahedral points. Conclusion. Our technical and typological analyses show that in comparison to layer 3, layer 2 is characterized by a small number of massive axes and adzes, no flints, few double scrapers, and only volume splitting tools aimed mainly at obtaining a small blade. Also, despite the fact that the core of the collection is the product of the hornstones of local origin, we observe a significant increase in the percentage of artifacts made of flint (13 %), which may indicate some new commodity strategies. The most interesting analogy can be traced with the dedicated Upper Kolyma Early Holocene complex, which contained blade points widely distributed in Northeast Asia and was present directly or indirectly in the materials from Chukotka (Verkhnetirsky IV and Nizhnechutinsky IV), Yakutia (Olbinski burial ground, Jubilee), Kamchatka (the Ushki I–IV layer, Avacha 1,9). This complex is believed to belong to specific Volbinsky traditions, which formed in the first half of the Holocene, about 8800–6000 years ago. It is also worth comparing these materials with other Kutarey sites – Sen’kin (Siniy) Kamen’, Ruchei Povarny, Gora Kutarey and adjacent territories.

Clay Compaction Test for the Core Wall of DJIPLOHO Dam

2013 ◽  
Vol 438-439 ◽  
pp. 1363-1366
Author(s):  
Jun Liu
Keyword(s):  
High Water ◽  
High Water Content ◽  
Hydroelectric Power Station ◽  
Dry Density ◽  
Left Bank ◽  
Hydroelectric Power ◽  
Power Station ◽  
The Earth ◽  
Oceanic Climate ◽  
Clay Core

The earth-rock dam on left bank of the head of DJIPLOHO Hydroelectric Power Station adopts the clay core dam. Due to the tropical oceanic climate which is hot and rainy, the soil of clay core wall has high water content. Through the compaction experiment on site, it chooses suitable dry density, formulates reasonable rolling parameters and finally achieves good construction quality, which ensures the construction progress and meets the requirement of engineering. This accumulates valuable experience for the design and construction of same types engineering.

scholarly journals Determining the quantitative parameters of the hydraulic model of combined irrigation systems based on the computer calculations algorithmization

2021 ◽  
Author(s):  
M. N. Lytov ◽  
Keyword(s):  
Quantitative Assessment ◽  
Irrigation System ◽  
Nodal Point ◽  
Computer Algorithm ◽  
Hydraulic Calculation ◽  
Inlet Section ◽  
Hydraulic Parameters ◽  
Irrigation Systems ◽  
Irrigation Methods ◽  
Quantitative Parameters

Purpose: development of a computer algorithm for a quantitative assessment of the hydraulic parameters of an irrigation and drainage system with the possibility of integrating different irrigation methods. Materials and methods. The design of structures for combined irrigation is based on hydraulic calculation. A feature of such systems is the ability to change irrigation methods, which is associated with a significant change in hydraulic parameters and the complication of hydraulic design of structures. Automation of hydraulic calculations based on a universal computer algorithm is the most acceptable way to solve the problem and the basis for designing combined irrigation systems. Results. A feature of the proposed algorithm for determining the quantitative parameters of the combined irrigation system is the use of a step-by-step approach followed by the formation of a generalized hydraulic screenshot of the entire structure. A screenshot of hydraulic parameters here means a quantitative assessment of hydraulic indicators for all nodal points of a structure, implemented by a calculation method for given, stationary modes of system operation. A set of this kind of static screenshots allows you to evaluate the process in dynamics, as well as to carry out comparative assessments of hydraulic parameters under different operating modes of the combined irrigation system. The algorithm offers an original way to identify objects based on the use of a linear coordinate system. The method makes it possible to organize an enumeration of the structural elements of the system and a step-by-step calculation of hydraulic parameters from the inlet section of the design segment to any given nodal point. Conclusions. The calculation results according to the proposed algorithm make it possible to form a specially organized data array, which is a set of symbolic-numeric values that determine the pressure level and water flow rate and identify them with the nodal point of the system.

GEOECOLOGICAL CHARACTERISTIC OF THE CHEBOKSARY RESERVOIR COAST

2017 ◽  
Author(s):  
Natalya Sitina ◽  
Natalya Sitina ◽  
Tatyana Sitina ◽  
Tatyana Sitina
Keyword(s):  
Negative Impact ◽  
Hydroelectric Power Station ◽  
Left Bank ◽  
Hydroelectric Power ◽  
Coastal Zones ◽  
Current State ◽  
Cheboksary Reservoir ◽  
Zone Of Influence ◽  
Key Sites ◽  
Negative Impacts

Construction of Cheboksary hydroelectric power station with a reservoir was begun in 1968 and was stopped in 1981. The hydrostation was put into operation when filling a reservoir to a mark of 63,0 m with incomplete construction of protective actions. As a result of rise in level of the Cheboksary reservoir to 68,0 m territories of the Nizhny Novgorod Region, the Republics of Mari El and the Chuvash will be flooded. Operation of the Cheboksary reservoir within 33 years on a temporary mark of the retaining level of 63,0 m promotes further development of possible negative impacts and deterioration of life of the population in points of accommodation getting to a zone of influence of a reservoir. In work problems of influence of the Cheboksary reservoir on the nature of adjacent territories are considered. The analysis of influence of natural and technogenic factors on the Cheboksary reservoir is submitted. Comparative research of the territory of a right bank and left bank on studying of hydrological and hydrogeological processes and processing of coast in a zone of influence of a reservoir on key points is conducted. The state is considered recreational development of the territory. Features of a current state of technical objects of the Cheboksary reservoir are defined, the geoecological situation on coast of a reservoir on the studied key sites is revealed. Recommendations about decrease in negative impact of recreational use of coastal zones of a reservoir are developed.

GEOECOLOGICAL CHARACTERISTIC OF THE CHEBOKSARY RESERVOIR COAST

2017 ◽  
Author(s):  
Natalya Sitina ◽  
Natalya Sitina ◽  
Tatyana Sitina ◽  
Tatyana Sitina
Keyword(s):  
Negative Impact ◽  
Hydroelectric Power Station ◽  
Left Bank ◽  
Hydroelectric Power ◽  
Coastal Zones ◽  
Current State ◽  
Cheboksary Reservoir ◽  
Zone Of Influence ◽  
Key Sites ◽  
Negative Impacts

Construction of Cheboksary hydroelectric power station with a reservoir was begun in 1968 and was stopped in 1981. The hydrostation was put into operation when filling a reservoir to a mark of 63,0 m with incomplete construction of protective actions. As a result of rise in level of the Cheboksary reservoir to 68,0 m territories of the Nizhny Novgorod Region, the Republics of Mari El and the Chuvash will be flooded. Operation of the Cheboksary reservoir within 33 years on a temporary mark of the retaining level of 63,0 m promotes further development of possible negative impacts and deterioration of life of the population in points of accommodation getting to a zone of influence of a reservoir. In work problems of influence of the Cheboksary reservoir on the nature of adjacent territories are considered. The analysis of influence of natural and technogenic factors on the Cheboksary reservoir is submitted. Comparative research of the territory of a right bank and left bank on studying of hydrological and hydrogeological processes and processing of coast in a zone of influence of a reservoir on key points is conducted. The state is considered recreational development of the territory. Features of a current state of technical objects of the Cheboksary reservoir are defined, the geoecological situation on coast of a reservoir on the studied key sites is revealed. Recommendations about decrease in negative impact of recreational use of coastal zones of a reservoir are developed.

scholarly journals ON ISSUE OF USING MICROHYDROPOWER PLANTS FOR IRRIGATION PURPOSES

2020 ◽  
Author(s):  
V. V. Slabunov ◽  
◽  
A. A. Kirilenko ◽  
O. V. Voyevodin ◽  
◽  
...  
Keyword(s):  
Power Plants ◽  
Water Movement ◽  
Hydraulic Turbine ◽  
Hydroelectric Power Station ◽  
Hydroelectric Power ◽  
State Control ◽  
Small Hydropower ◽  
Irrigation Systems ◽  
Irrigation Network ◽  
Hydropower Plants

Purpose: to assess the technological and regulatory and technical capabilities of developing and applying power supply complexes using the energy of water flow, in relation to Russian standards to meet the electricity needs of decentralized reclamation (irrigation) systems. Materials and methods. Scientific and technical materials of Russian and foreign authors, as well as the regulatory and technical base of the Russian Federation were used as the initial data. The information processing methods were comparison, analogy, classification and systematization. Results and discussion. Among various design features of the hydropower equipment under consideration, capable of meeting local needs for electricity and at the same time having the ability to combine with elements of an irrigation network (based on relative dimensions, shape, efficiency, etc.), micro-hydroelectric power plants stand out: with propeller, radial axial, axial and capsule hydraulic turbine. The most effective schemes for installing hydraulic turbines are horizontal direct-flow and vertical Z-shaped ones. Analysis of the register of standards in the field of technical regulation in the sphere of hydropower showed that out of 131 standards under consideration, 106 can be partially applied to micro hydropower plants. Providing low-power hydropower facilities with standardization documentation has a priority in the direction of operation (21 %), monitoring and state control (19 %), and repair and reconstruction (19 %). Conclusions. The functioning of a micro-hydroelectric power station based on the energy of water movement provides for the use of a set of design solutions, which requires additional study in order to be linked to the elements of reclamation (irrigation) systems. The scope of the considered standardization documents can be extended to small hydropower facilities, taking into account the specific features of their operation. In this regard, there is a need for the development of scientifically grounded provisions of existing or being developed regulatory documents.

scholarly journals Algorithm for computer modeling of combined irrigation systems hydraulic parameters

2021 ◽  
Vol 843 (1) ◽  
pp. 012052
Author(s):  
V V Borodychev ◽  
M N Lytov ◽  
A S Razin
Keyword(s):  
Computer Simulation ◽  
Hydraulic Calculation ◽  
Time Interval ◽  
Hydraulic Parameters ◽  
Irrigation Systems ◽  
Modes Of Operation ◽  
Serial Search ◽  
Operating Modes ◽  
External Conditions ◽  
Irrigation Technologies

Abstract A feature of combined irrigation systems is the integration of various technologies and methods of irrigation with the implementation of such a possibility on the basis of a single technical system. The hydraulic calculation of such systems is more complicated, since it is assumed that it is possible to implement various modes of operation, which differ by the combination of hydraulic parameters. The operating modes are determined by the combination of the involved irrigation technologies carried out simultaneously. The research has proposed an algorithm for the computer simulation of combined irrigation systems hydraulic parameters. The algorithm implements the principle of step-by-step calculation and formation of statistical screenshots of the hydraulic parameters of the system based on the basic calculated dependencies of classical hydraulics. Static screens can be performed at any time interval, which allows to assess the dynamics of the process under changing external conditions, as well as study the system under different operating modes. The algorithm has built an ingenious system of objects identification, making it possible not only to verify the uniquely defined knots of stems section, but also to organize serial search nodal points in accordance with the architecture of the construction of hydro-reclamation systems.

IMPLEMENTATION OF THE WATER USE PLAN PROCEDURES, MEASURES AND WATER USE

2020 ◽  
Vol 6 (2) ◽  
pp. 50-58
Author(s):  
Matluba Muxammadiyeva ◽  
◽  
Iftixor Ergashev
Keyword(s):  
Performance Appraisal ◽  
Water Use ◽  
Irrigation System ◽  
Low Pressure ◽  
Irrigation Systems ◽  
Irrigation Methods ◽  
Point Pressure ◽  
A Performance

If we look at the existing irrigation methods used today in the country, then they are divided into: ground, rainfall, underground or underground, drip and spray. Basically, they are transferred to the irrigation field in two forms: through gravity and pressure irrigation systems. Naturally, a gravity irrigation system is economically more expensive than a low pressure irrigation system. However, from a performance appraisal stand point, pressure irrigation methods are less efficient and have serious disadvantages

HISTORY OF THE ORIGIN OF THE ARTIFICIAL IRRIGATION SYSTEM IN THE LOW OF THE AMUDARYA AND ITS FEATURES (VIII CENTURY BC - IV CENTURY CE)

2020 ◽  
Vol 1 (3) ◽  
pp. 85-95
Author(s):  
Nigora Egamberdieva ◽  
Keyword(s):  
Water Management ◽  
Irrigation System ◽  
Flood Water ◽  
Amu Darya ◽  
History Of

In the lower reaches of the Amu Darya, artificial irrigation was created on the basis of flood water management of the river. The first channels were wide and shallow. Saka was used for flood water management. Saka was invented by tazabagyabinces. Thechannels which derived from the Akchadarya Delta were strongly branched, and the main channels were derived from the Sarikamysh Delta

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