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Estimation of Runoff and Sediment Yield Using SWAT Model: The Case of Katar Watershed, Rift Valley Lake Basin of Ethiopia
Issue:
Volume 8, Issue 6, December 2020
Pages:
125-134
Received:
16 September 2020
Accepted:
28 September 2020
Published:
19 November 2020
Abstract: Estimating runoff and sediment yield at watershed level is important for better understanding of hydrologic processes and identifying hotspot area by using Soil and Water Assessment Tool (SWAT) model for intervention strategies. From the result of Global sensitivity analysis, 12 highly sensitive parameters identified. The obtained results were satisfactory for the gauging station (coefficient of determination (R2)=0.8, Nash-Sutcliffe Efficiency (NSE)=0.6 and percent difference or percent bias (PBIAS)=0) from 1990 to 2005(16) years used calibration and (R2=0.6, ENS=0.55and PBIAS=1.2) from 2006 to 2013(8 year) were used for validation period respectively. Among all sub-watersheds, nine sub watersheds were more vulnerable to soil loss and potentially prone to erosion risk, which was out of range of tolerable soil loss rate (18 tha-1yr-1). In conclusion, the SWAT model could be effectively used to estimate runoff and sediment yield; and identified hotspot area. In addition, the result could help different stakeholders to plan and implement appropriate interventions strategies in the Katar watershed.
Abstract: Estimating runoff and sediment yield at watershed level is important for better understanding of hydrologic processes and identifying hotspot area by using Soil and Water Assessment Tool (SWAT) model for intervention strategies. From the result of Global sensitivity analysis, 12 highly sensitive parameters identified. The obtained results were sati...
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Formulation of Design Concepts of Complex Technical Tools and Technological Processes of Plant Cultivation
Daba Nimaevich Radnaev,
Yuri Antonovich Sergeev,
Andrei Alexandrovich Abiduev,
Sergei Vasilievich Petunov
Issue:
Volume 8, Issue 6, December 2020
Pages:
135-138
Received:
3 February 2020
Accepted:
10 November 2020
Published:
24 November 2020
Abstract: Nowadays both agricultural science and practice possess a great amount of experimental data that should be taken into account during the process of development of new technological procedures and working tools. Consequently, the necessity of designing of technical processes appears in order to identify their effectiveness. That is why appliance of methods of synthesis of technological processes is of immediate interests. These methods of synthesis of technological processes should be based on the characteristics of tillage, seeding and production systems of the economy and latter should define the realization of projected technological processes. The design of technological processes is one of the complex problems with its characteristic feature – the lack of knowledge about the methods of designing, suitable for system and structural modeling and algorithmization of design processes. To overcome this incompleteness, a systematic approach is needed. The system approach underlines that specificity of complex objects lies in the nature of their constituent parts and elements as well as in their interrelationships. This article presents the design methodology that is based on the formulated fundamental assumptions and principles of the system including more specific statements, revealing the structure and content of the design operations, the synthesis of the solutions choice. The article also deals with the designed principles of technological compatibility and emergence suitability for system-structural analysis of complex technical means and technological processes, consisting of statements having a hierarchical structure, where the degree of the goals specification increases from level to level, and the approval of the last level determines the direction of the search for the optimal solution of the problem.
Abstract: Nowadays both agricultural science and practice possess a great amount of experimental data that should be taken into account during the process of development of new technological procedures and working tools. Consequently, the necessity of designing of technical processes appears in order to identify their effectiveness. That is why appliance of ...
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Numerical Investigation of the Performance of Solar Collectors
Muhammad Ayaz Akbar,
Hafiz Muhammad Awais,
Muhammad Mubashir Naveed,
Hafiz Abdul Saboor,
Dr. Tareq Manzoor
Issue:
Volume 8, Issue 6, December 2020
Pages:
139-144
Received:
9 November 2020
Accepted:
26 November 2020
Published:
4 December 2020
Abstract: Solar energy is the most abundant form of energy on this planet. In Europe and other countries with relatively low temperatures, where hot water is one of the basic needs for human beings, solar collectors are used to fulfilling their needs. In this paper performance of the solar collector will be analyzed using ANSYS software. Under specific conditions, different analyses will be performed to evaluate the performance of a solar collector containing water as heat transfer fluid. A Computational Fluid Dynamics, CFD analysis will be performed to check the heat transfer capability of copper (Cu) and aluminum (Al). The surging temperature could cause deformation, so in this paper, ANSYS structural software will be used to analyze the sustainability of structure under solar heat, so the performance of each material in solar energy applications can be estimated. After these analyses, we will be able to predict the maximum output temperature accurately we can obtain at a different time of the day, and each temperature we will analyze the maximum deformation within the structure because the pipes of solar collectors are not usually too thick, so the selection of material for the pipe is crucial. The purpose of this work is to simulate the performance of solar collectors under specific conditions and understand the temperature distribution along with the collector and also analyze the deformation we can obtain at different temperatures.
Abstract: Solar energy is the most abundant form of energy on this planet. In Europe and other countries with relatively low temperatures, where hot water is one of the basic needs for human beings, solar collectors are used to fulfilling their needs. In this paper performance of the solar collector will be analyzed using ANSYS software. Under specific condi...
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Some Aspects Regarding Torque Study and Elaboration of the Blades Orientation Mechanism for Microhydropower Plant
Bostan Viorel,
Bostan Ion,
Dulgheru Valeriu,
Ciobanu Oleg
Issue:
Volume 8, Issue 6, December 2020
Pages:
145-153
Received:
3 November 2020
Accepted:
16 November 2020
Published:
8 December 2020
Abstract: The analysis of hydraulic energy conversion systems has demonstrated the opportunity for the development of water kinetic energy conversion systems compared to potential energy conversion systems. Insistent searches of authors have led to the design and licensing of some advanced technical solutions for outflow micro hydroelectric power plants. They are based on the hydrodynamic effect, generated by the hydrodynamic profile of blades and by the optimal blades' orientation towards water streams with account of energy conversion at each rotation phase of the turbine rotor. The basic advantage of the flow microhydropower plant is the increase of the conversion efficiency by the simultaneous use of the pressure effects of water streams on the blade surface and of the hydrodynamic effect generated by the hydrodynamic profile of the blade with continuous blade orientation. The most important nodes of the microhydropower plant are the hydrodynamic rotor with vertical axis and the mechanism of continuous orientation of the blades depending on the direction of water currents. The paper makes an analysis of the brief torque and of the forces applied on the hydrodynamic blades located in the transition zone from the upstream area to the downstream area, by positioning the blades according to the flow velocity of the water flow which leads to increased hydrodynamics forces developed by each blade and the simultaneous reduction of the hydraulic resistance forces to the rotation of the blades, based on which the mechanism of orienting the blades in optimal positions against water currents was designed, developed, and manufactured.
Abstract: The analysis of hydraulic energy conversion systems has demonstrated the opportunity for the development of water kinetic energy conversion systems compared to potential energy conversion systems. Insistent searches of authors have led to the design and licensing of some advanced technical solutions for outflow micro hydroelectric power plants. The...
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