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.

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

Sustainable Irrigation: Karez System in Afghanistan

2020 ◽  
Vol 6 (2) ◽  
pp. 1-18
Author(s):  
Abdullah Azami ◽  
◽  
Jay Sagin ◽  
Sayed Hashmat Sadat ◽  
Hejratullah Hejran ◽  
...  
Keyword(s):  
Supply Chain ◽  
Water Supply ◽  
Land Surface ◽  
Irrigation System ◽  
Irrigation Scheme ◽  
Irrigation Systems ◽  
Irrigation Methods ◽  
Sustainable Water Supply ◽  
Water Based ◽  
Sustainable Irrigation

In Afghanistan, water is mostly used for agricultural purposes. The water supply chain requires updating to ensure its sustainability. Different irrigation methods – such as surface water based irrigation (via canals), groundwater based irrigation, and the Karez irrigation system – are applied across the country. Considering the compatibility of the Karez system with the environment, it can be deemed the most effective irrigation scheme, as it allows collecting a significant amount of groundwater and conveying it to land surface via sub-horizontal tunnels using gravity. This article analyzes Afghanistan’s Karez irrigation systems currently feeding water to over 170,000 ha of farmland with a potential to expand and become a component of sustainable water supply chain.

SCIENTIFIC RATIONALE FOR THE DEVELOPMENT OF LOW-INTENSITY IRRIGATION SYSTEMS IN AZERBAIJAN

2020 ◽  
pp. 114-120
Author(s):  
Aliyev Z.H.
Keyword(s):  
Soil Erosion ◽  
Surface Relief ◽  
Rain Rate ◽  
Irrigation System ◽  
Land Utilization ◽  
Irrigation Systems ◽  
Deep Groundwater ◽  
Low Intensity ◽  
Irrigation Methods ◽  
Scientific Rationale

The results of the study revealed that the mismatch intensity rain rate of water absorption into the soil for-mation of a surface relief and soil erosion, uneven and shallow soaking imperfection open irrigation system at a su-perficial irrigation, the need for different irrigation methods in the growing and not growing periods, low coeffi-cient land utilization, high cost of irrigation and other features are, to a certain extent in conflict with the require-ments of watering cultivated with techniques for / of crops in an area at the deep groundwater.

scholarly journals Scientific Rationale for The Development of Low-Intensity Irrigation Systems in Azerbaijan

2018 ◽  
Vol 5 ◽  
pp. 402-411
Author(s):  
Qasim Ali Oqlu Soltanzade
Keyword(s):  
Surface Relief ◽  
Rain Rate ◽  
Irrigation System ◽  
Soil Formation ◽  
Land Utilization ◽  
Irrigation Systems ◽  
Deep Groundwater ◽  
Low Intensity ◽  
Irrigation Methods ◽  
Scientific Rationale

The results of the study revealed that the mismatch intensity rain rate of water absorption into the soil formation of a surface relief and soil erosion, uneven and shallow soaking imperfection open irrigation system at a superficial irrigation, the need for different irrigation methods in the growing and not growing periods, low coefficient land utilization, high cost of irrigation and other features are, to a certain extent in conflict with the requirements of watering cultivated with techniques for / of crops in an area at the deep groundwater.

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 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.

On the Applicability of “Provision-Appropriation” Theory to Irrigation Management: An Analysis Based on Institutional Change in the Dongping Irrigation Area

2010 ◽  
Vol 2 (1) ◽  
pp. 83-99
Author(s):  
Chen Jing ◽  
Kan Shizuan ◽  
Tong Zhihui
Keyword(s):  
Institutional Change ◽  
Irrigation System ◽  
Irrigation Management ◽  
Historical Research ◽  
Institutional Changes ◽  
Irrigation Systems ◽  
Irrigation Area ◽  
Site Investigations ◽  
Current State ◽  
System Sustainability

AbstractThis paper, based on historical research on irrigation administration in the Dongping area and on-site investigations into its current state, explores the benefits and problems produced by two institutional changes. As a common pool resource situation, irrigation systems’ “provision” and “appropriation” are two separate issues; any institutional change must thus offer two different solutions. The study concludes that the participatory changes undertaken in the Dongping irrigation area failed, in the end, to resolve the problem of irrigation system sustainability. In particular, it proved difficult for collective action to take place around provision, which led to difficulties in operating the irrigation system.

Weidebevloeiing in de Brabantse Scheeken

2019 ◽  
Vol 4 (1) ◽  
pp. 2-14
Author(s):  
HANS BLEUMINK
Keyword(s):  
Water Management ◽  
The Netherlands ◽  
Crop Yields ◽  
Irrigation System ◽  
Surface Irrigation ◽  
Irrigation Systems ◽  
Agricultural Water Management ◽  
History Of ◽  
The 19Th Century ◽  
Water Boards

Historical surface irrigation of pastures in the Dutch province of Noord-Brabant: visible traces of a failed experiment In the second half of the 19th century, some major changes occurred in the water management of the eastern and southern provinces of the Netherlands. Unlike the low-lying western parts of the Netherlands which were characterised by polders and had a long history of formal water boards, the higher eastern and southern parts of the Netherlands were characterized by brook systems and sandy soils, and had no centralised water boards until 1850. From the 1850s onward, water boards were introduced in these higher regions as well, and agronomical scientists and organisations like the Nederlandse Heidemaatschappij endeavoured for the modernisation of agricultural water management. One of their priorities was the introduction of modern forms of surface irrigation of pastures, in order to increase crop yields. In various places modern irrigation systems were constructed. From the 1900s onward, these systems were abandoned due to the introduction of new chemical fertilizers, among others. This article describes the construction and abandonment of one of these modern irrigation systems that was located in Liempde, in the province of Noord-Brabant. The local farmers were not interested in the new technique, and within a few years the system was transformed in a poplar plantation. Nowadays, the area is part of a nature reserve. Nonetheless, the global layout of the irrigation system is still visible.

scholarly journals Nepal: Food Security, a Localized Institutional Irrigation Perspective on Public Irrigation Systems

2012 ◽  
pp. 95-99 ◽  
Author(s):  
Upendra Gautam
Keyword(s):  
Large Scale ◽  
Irrigation System ◽  
Irrigation Management ◽  
Institutional Development ◽  
Resource Base ◽  
Irrigation Systems ◽  
Irrigated Area ◽  
Social Insecurity ◽  
The Government ◽  
Agriculture Extension

Oriental philosophers have given top priority to food for orderly state affairs as well as personal wellbeing. In past, Nepal had a strong agricultural economy based on indigenous Farmer Managed Irrigation System (FMIS). State policy helped promote these systems. But contemporary Nepal opted for state control on irrigation water by building large scale public irrigation systems. In the last 43 years of planned development (1957-2002), the government has spent 70% of US$1.3 billion on these systems, covering 30% of the irrigated area in the country; the remaining 70% is with the FMIS. Despite the investment, these systems neither promoted themselves as an enterprise nor helped enhance agricultural productivity leading to social insecurity. This social insecurity is reflected in the country's increasing import of food, mass workforce exodus for employment abroad, and added socio-economic vulnerability due to climate change.Donor and government recommendations centered on (i) expansion of irrigated area, (ii) irrigation management transfer, and (iii) agriculture extension seem to have failed in Nepal. These failures asked for alternative institutional development solutions, whereas public irrigation systems are (i) localized to establish system's operational autonomy with ownership and governance, (ii) treated as a rich resource-base with water, land and labor, and (iii) recognized as cooperative enterprise of local stakeholders by law with authorities to enter into joint actions with relevant partners for promoting commercialization and environmental quality of irrigated agriculture.DOI: http://dx.doi.org/10.3126/hn.v11i1.7223 Hydro Nepal Special Issue: Conference Proceedings 2012 pp.95-99

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