A megegyezés gátja: vízelosztási kérdések Egyiptom, Szudán és Etiópia között

2020 ◽  
Vol 14 (1-2.) ◽  
pp. 21-42
Author(s):  
Rashed Daher

Recent developments of the Grand Ethiopian Renaissance Dam aiming to utilize the River Nile’s water for electricity production sparked serious debates in Africa. Under construction since 2011, the project has severe geopolitical consequences not only in its immediate neighbourhood but also in the downstream countries such as Sudan and Egypt that are almost exclusively reliant on the river’s water for industrial, agricultural, and household purposes. Although the Nile is the longest river on Earth, its water is shared by tens of millions of users in a region characterized by water scarcity. Therefore, the Ethiopian dam, with its potentially negative consequences, is considered an existential threat for Egypt and contributes to the political tensions between the two distant countries.This analysis aims to present the political choices behind this megaproject focusing on Egypt, Sudan, and Ethiopia and the impacts that different scenarios of water usage (how fast the reservoir behind the Dam is filled) may have on the downstream countries. In this sense, negotiations on the completion of the Dam and the hydroelectric power plant are crucial for Egypt’s water resources. My analysis tries to shed light on the importance of this topic in the Egyptian political discourseand show the changes in the political leeway of Egyptian leadership since 2011. As the case provides yet another illustration of interconnected environmental issues, my research also highlights the political and economic dilemmas embedded in similar situations.

Author(s):  
O. Dehtiarenko ◽  
S. Shashkov ◽  
O. Misechko

One of the promising areas for the development of renewable energy in Ukraine could be the expansion of the small hydroelectric power plant (HPP). The main obstacle to this is the absence of a sharp increase in the profitability of such facilities, since the operation of small hydropower facilities is based on the use of only one of their resource function, which is not consistent with the need to intensify the use of nature and integrated use of natural resources. The most expedient direction of increasing the efficiency of functioning of small hydropower facilities, increasing their economic, social and ecological significance is the organization of regional natural-economic complexes (RPGK) whose activity is based on the combination of electricity production, maintaining the sustainability of the recreation ecosystem, can significantly increase their market value. Also important is the issue of software to solve this problem.


2020 ◽  
Vol 1 (1) ◽  
pp. 23
Author(s):  
Francisco Javier Martinez Monseco

<p>This article presents a guide to designing a maintenance plan for any industrial system. As an example, it develops a maintenance plan for highly reliable equipment, such as a hydroelectric power plant, where instant availability and reliability are crucial in its operation. The development of the proposal serves as a basis for the transversal development of any industrial system that has the same operational objectives (manufacturing lines), transport (trains, aircraft) and also involves safety and environmental aspects in its proper functioning. Today’s society requires that there are more and more industrial processes in which the maximum availability of the systems must be guaranteed, and at the same time there must be a minimum number of incidents that prevent the unavailability of the process. The methodology used has consisted firstly of dividing the complex industrial system into systems to be analysed on the basis of the functions they have to perform, then on the basis of the fault history a list of potential faults to be analysed has been determined, taking into account the risk of the system itself. From here, the systems of the hydroelectric plant have been classified to determine the priorities of actions. The different maintenance techniques to be applied have been carefully considered, focusing on the need to analyse condition-based maintenance techniques, such as predictive techniques, which allow us to define the point of potential failure based on parameters, and thus be able to plan maintenance actions in a justified manner. In the specific case of a hydroelectric generation plant, the fundamental objective is based on the commitment to<br />operate in the electricity market (high reliability and immediate availability), and the performance of maintenance actions imply in most cases the shutdown of the plant and therefore the loss of income from electricity production. Finally, a design of a justified maintenance plan for a hydroelectric power plant has been proposed based on the methodology explained.</p>


Author(s):  
Jan H. Wiśniewski ◽  
Bartosz M. Olszański

The chapter focuses on explaining the construction of author's own engineering-level model which calculates energy production based on historical water level and flow rate readings as well as economic factors such as net present value of the proposed investment on the example of a HPP on the Wkra River. The model methodology assumes the identification of location's hydrological features and translates them into a set of contingency scenarios. Various internal costs, such as maintenance or labor costs, related to normal HPP activity and taxation are discussed and incorporated into the economic part of the model. Test case results indicate that for a series of good years in terms of water flow and electricity production, full repayment of initial investment costs is possible after less than three years. Results for the chosen modernization parameters indicate that within 10 years of installing a new turbine, even the most pessimistic case would bring added value to the real estate valuation.


2019 ◽  
Vol 12 (6) ◽  
pp. 2259
Author(s):  
Eder Mileno Silva De Paula

A exploração hidroelétrica promove impactos naturais e sociais irreversíveis, também observados nas bacias hidrográficas amazônicas que receberam as Usinas Hidrelétricas de Balbina, Tucuruí e Samuel. A Usina Hidrelétrica de Belo Monte (UHEBM) está sendo construída desde 2011 no Baixo Curso do Rio Xingu e começou a produzir energia elétrica no ano de 2016. Os barramentos construídos para UHEBM impactam na dinâmica do fluxo fluvial de energia, matéria e informação do Rio Xingu, com desdobramentos negativos para o meio biótico, abiótico e para as comunidades indígenas, ribeirinhas e urbanas locais. Nesta pesquisa teve-se objetivo de analisar as consequências da exploração hidroelétrica no funcionamento das paisagens fluviais no Baixo Rio Xingu, através de análises geossistêmicas dos componentes das paisagens. Analisou-se o funcionamento antes do início do represamento da água (1985 a 2014) e após o represamento do Xingu (2016 a 2019). As conclusões indicam como se dá o funcionamento geoecológico de rios amazônicos explorados por hidrelétricas, especificamente aqueles com trechos de vazão reduzida. Essas conclusões podem contribuir no planejamento e gestão ambiental de paisagens fluviais e ajustes na operação da UHE Belo Monte. Repercussion of Hydrielectric Exploration in the Geoecolocical Performance of Amazon Fluvian Landscapes   ABSTRACT  Hydroelectric exploitation promotes irreversible natural and social impacts, also observed in the Amazonian basins that received the hydroelectric plants of Balbina, Tucuruí, and Samuel. The Belo Monte Hydroelectric Power Plant (UHEBM) is in construction since 2011 in the low-lying region of the Xingu River and started producing electricity in the year 2016. The dams built for the UHEBM impact on the dynamics of the river flow of energy, matter and information on the river Xingu with negative consequences for the biotic and abiotic environment, and for the indigenous, riverside and urban communities. The research’s objective was to analyze the consequences of hydroelectric exploitation on the river landscape in the lower Xingu River through geosystemic analysis of landscape components. The operation was analyzed in the period before the beginning of the water dam (1985 to 2014) and after (2016 to 2019) the damming of Xingu. The conclusions indicate the geoecological functioning of Amazonian rivers explored by hydroelectric plants, specifically those with reduced flow stretches, and these conclusions can contribute to the planning and environmental management of river landscapes and adjustments in the operation of the Belo Monte Hydroelectric Power Plant. Keywords: Belo Monte, Volta Grande do Xingu, Hydrogeography, Fluvial Geomorphology.


2021 ◽  
Vol 23 (1) ◽  
pp. 29-31
Author(s):  
Vladana Rajaković-Ognjanović ◽  
Tina Dašić

When planning the construction of a hydroelectric power plant, an important segment is adequate monitoring of water quality. With an appropriate monitoring program, the multifunctional use of artificial lakes is enabled. Eutrophication (nutrient over-enrichment) of water in a lake is a phenomenon that has been noticed in all lakes. The consequence of eutrophication is the endangerment of the aquatic ecosystem. Eutrophication is a phenomenon that occurs as a response of the aquatic ecosystem to the increased concentration of nutrients, phosphorus (P) and nitrogen (N), due to natural and anthropogenic activities. Recent research indicates a correlation between local climate change and water circulation and the impact of climate change on all phenomena in the hydrological cycle. Temperature fluctuations, huge amounts of rain when precipitation is analysed, constant heating and increase in humidity all affect more intense eutrophication. The key conclusions of the research dealing with the construction of the hydroelectric power plant in Komarnica are: to introduce monitoring (permanent control) of water quality in lakes in order to minimize or control, even prevent eutrophication. Each artificial lake has its own unique characteristics. The dependence of chlorophyll, phosphorus and lake volume varies depending on the month, season and year. The proposal for the lake that will be built on Komarnica, which is part of the future hydroelectric power plant, is a monthly monitoring of the concentration of chlorophyll, nutrients and the volume of the lake. Seasonal monitoring depends on precipitation, hydrological and limnological characteristics and trends of dry and rainy episodes. Analyzes and previous research have shown that the introduction of mandatory parameters for monitoring water quality does not increase the cost of electricity production and energy conservation, but significantly improves and enhances the quality of the environment.


2017 ◽  
pp. 1236-1255
Author(s):  
Jan H. Wiśniewski ◽  
Bartosz M. Olszański

The chapter focuses on explaining the construction of author's own engineering-level model which calculates energy production based on historical water level and flow rate readings as well as economic factors such as net present value of the proposed investment on the example of a HPP on the Wkra River. The model methodology assumes the identification of location's hydrological features and translates them into a set of contingency scenarios. Various internal costs, such as maintenance or labor costs, related to normal HPP activity and taxation are discussed and incorporated into the economic part of the model. Test case results indicate that for a series of good years in terms of water flow and electricity production, full repayment of initial investment costs is possible after less than three years. Results for the chosen modernization parameters indicate that within 10 years of installing a new turbine, even the most pessimistic case would bring added value to the real estate valuation.


2021 ◽  
Vol 8 (5) ◽  
pp. 152-166
Author(s):  
M. Medewou ◽  
K. Klassou ◽  
P. Chetangny

Climate change is a major threat to industrial development because of its adverse effects on the energy sector, especially hydroelectric power plants. This paper focuses on the analysis of the impact of climate change on the Mono River basin and the implications for the electricity production of Nangbéto Hydroelectric Power Plant. The approach consisted of combining historical hydrological data and physical, technical, and economic information to analyze the extent to which variations in average rainfall and global warming impacted the operation of the Nangbéto Hydroelectric Power plant. Based on the curves obtained, the impacts of climate change on the Mono River and on the operation of the Nangbéto Power Plant were recorded. Also, the management of the Nangbéto dam water retainer by the current operator was analyzed to highlight the strengths relating to the optimization of electricity production and the economic profitability of the plant. Keywords: Climate change, hydropower plant, optimization, hydrological data.


2002 ◽  
Vol 122 (6) ◽  
pp. 989-994
Author(s):  
Shinichiro Endo ◽  
Masami Konishi ◽  
Hirosuke Imabayashi ◽  
Hayami Sugiyama

Author(s):  
William M. Lewis

This book brings together in compact form a broad scientific and sociopolitical view of US wetlands. This primer lays out the science and policy considerations to help in navigating this branch of science that is so central to conservation policy, ecosystem science and wetland regulation. It gives explanations of the attributes, functions and values of our wetlands and shows how and why public attitudes toward wetlands have changed, and the political, legal, and social conflicts that have developed from legislation intended to stem the rapid losses of wetlands. The book describes the role of wetland science in facilitating the evolution of a rational and defensible system for regulating wetlands and will shed light on many of the problems and possibilities facing those who quest to protect and conserve our wetlands.


Author(s):  
Steven P. Vallas

Social scientific efforts to understand the political and economic forces generating precarious employment have been mired in uncertainty. In this context, the Doellgast–Lillie–Pulignano (D–L–P) model represents an important step forward in both theoretical and empirical terms. This concluding chapter scrutinizes the authors’ theoretical model and assesses the present volume’s empirical applications of it. Building on the strengths of the D–L–P model, the chapter identifies several lines of analysis that can fruitfully extend our understanding of the dynamics of precarization, whether at the micro-, meso-, or macro-social levels of analysis. Especially needed are studies that explore the dynamics of organizational fields as these shape employer strategy and state policy towards employment. Such analysis will hopefully shed light on the perils and possibilities that workers’ organizations face as they struggle to cope with the demands of neoliberal capitalism.


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