scholarly journals Rampant Development of Water Diversion Projects as a Threat to Fish Diversity: A Case of the Modi Khola

2019 ◽  
Vol 24 ◽  
pp. 17-19
Author(s):  
Indira Sharma Bhandari
Keyword(s):  
River Water ◽  
Economic Feasibility ◽  
Water Diversion ◽  
Fish Diversity ◽  
Hydropower Generation ◽  
Monitoring Mechanism ◽  
Environmental Feasibility

The current focus of the country in meeting the increasing demands for energy has led to the increase in number of river water diversion projects for hydropower generation. But the lack of proper guidelines and monitoring mechanism has resulted in rampant licensing of hydropower projects. There are no rules for determining the appropriate number of water diversion projects in a single river. By discussing the case of rampant water diversion projects in the Modi Khola, of western Nepal, this paper raises an important issue of environmental feasibility of projects in the context where, only the engineering and economic feasibility of a project is taken as the basis for project approval and implementation.

Central heating by seasonal sensible heat storage of solar thermal energy

2021 ◽  
Vol 4 (2) ◽  
pp. 100-110
Author(s):  
Abdul Mosaur Waseel ◽  
Najib Rahman Sabory ◽  
Hameedullah Zaheb ◽  
Abdul Kareem Waseel
Keyword(s):  
Thermal Energy ◽  
Heat Storage ◽  
Residential Buildings ◽  
Economic Feasibility ◽  
Solar Thermal ◽  
Maintenance Cost ◽  
Sensible Heat ◽  
Solar Thermal Energy ◽  
Central Heating ◽  
Environmental Feasibility

Production of required thermal energy to heat residential buildings is a considerable issue in energy studies. Kabul city is a city in which the coal-fired central heating systems for providing the mentioned energy is in expansion process. And, coal as feeding source of these systems with generation of carbon dioxide (CO2) is the main cause of greenhouse gases (GHGs) emissions in winter. Fortunately, Kabul city has maximum solar radiation in summer warm season which can be used for fulfilling of this demand in winter cold season. The method which can perform this task is the central heating by seasonal sensible heat storage of solar thermal energy. But, the economic and environmental feasibility and viability of this method is a discussable issue. In this study, the central heating by seasonal sensible heat storage of solar thermal energy and its economic and environmental feasibility and viability is studied. It is tried that this system is compared in a logical method with current coal-fired systems. The economic feasibility study is accomplished by comparison of initial or capital cost and annual operation and maintenance cost with the usage of existing data and thermodynamic analytic methods. The environmental viability study is accomplished by comparison of annual emissions of CO2 with the usage of online emissions calculator. Unfortunately, it is found that seasonal sensible heat storage of solar thermal energy is not an economically feasible method for central heating due to its high initial cost and cannot be used in an economically beneficial manner for central heating. But fortunately, it is an environmentally viable method and environmentally friendly way due to its no and/or zero CO2 emissions. To sum up, it is suggested that, this method should be used for district heating which can make this system economically feasible.

scholarly journals Water quality and fish diversity in Korotoa River of Bogura, Bangladesh

2020 ◽  
Vol 32 (1) ◽  
pp. 60-72
Author(s):  
SAMINA AHATUN ◽  
MD. SIRAJUL ISLAM ◽  
MD. HUMAYUN KABIR ◽  
MAUSUMI REHNUMA ◽  
MD. ENAMUL HOQ
Keyword(s):  
Water Quality ◽  
River Water ◽  
Fish Species ◽  
Physicochemical Parameters ◽  
Industrial Effluent ◽  
Domestic Sewage ◽  
Fish Diversity ◽  
Quality Degradation ◽  
Water Fish

The study was conducted to explore the physicochemical parameters of water, fish diversity andfisheries resources of Korotoa River at Bogura city of Bangladesh during July 2015 to February 2016. Thewater samples were collected from five sampling stations in the Korotoa River during wet and dry seasons.The results of the study showed that temperature, EC, TDS, DO, BOD, alkalinity, acidity and total hardnessof the Karotoa River water were 25.86ºC, 297.41 ?S/cm, 98.86 mg/L, 2.17 mg/L, 2.64 mg/L, 122.05mg/L, 3.28 mg/L and 75.59 mg/L, respectively. The DO and BOD contents of the river water were foundunsuitable for fisheries when compared with the standard of DoE. A total of ten fish species under six ordersand seven families were identified during the study period. The study also revealed that the most remarkablecause of water quality degradation of the river was waste dumping (58%) followed by urbanization and riverbank erosion. The water quality degradation (46%) negatively influenced the abundance of fish species. Theresults concluded that the water quality of the river is not favorable for production of fishes and other aquaticorganisms. The study suggested that the source of water quality degradation should be closely monitoredtogether with the industrial effluent and/or domestic sewage discharge should be reduced or stopped throughthe initiatives of the local government concerned to maintain sound and healthy ecosystem of the river.

scholarly journals Perspectivas de viabilidade econômica e ambiental: Integração entre a piscicultura e fruticultura irrigada em São João do Piauí (PI)

2016 ◽  
Vol 11 (5) ◽  
pp. 103
Author(s):  
Maria Keila Jerônimo ◽  
Marcelo Batista Gomes ◽  
Cláudio Evangelista Sousa ◽  
Thiago Oliveira da Silva Brito ◽  
Elenice Monte Alvarenga
Keyword(s):  
Environmental Sustainability ◽  
Fish Farming ◽  
Fruit Production ◽  
Economic Feasibility ◽  
Product Diversification ◽  
Northeastern Brazil ◽  
Semiarid Region ◽  
Financial Return ◽  
Secondary Sources ◽  
Environmental Feasibility

<p>O Estado do Piauí apresenta-se como excelente campo de trabalho na avaliação da viabilidade de ações que visem à inclusão produtiva, à diversificação da produção e ao aumento da produtividade, permitindo-se, com isso, a avaliação do uso de tecnologias sociais na promoção do desenvolvimento regional sustentável. Neste trabalho objetivou-se atestar a viabilidade econômica e ambiental da utilização das águas do rio Piauí na piscicultura e seu posterior reuso em atividades de irrigação. O município de São João do Piauí no Estado do Piauí se consolida como espaço amostral de grande interesse, pois localiza-se em região semiárida, com sérias dificuldades de infraestrutura e distribuição de renda, além de ser palco para o desenvolvimento de um vultoso projeto de irrigação. Foi realizada uma estimativa do retorno financeiro gerado pela integração entre a piscicultura e a fruticultura irrigada, por meio da coleta de dados demonstrativos do rendimento destas atividades em outros municípios do nordeste do Brasil. Além disso, avaliou-se a viabilidade ambiental do consórcio entre ambos os cultivos, com base no estudo de indicadores de sustentabilidade calculados com dados oriundos de fontes secundárias. A partir das estimativas econômicas realizadas, foi verificada a positividade da viabilidade econômica da associação das cadeias produtivas, bem como se pode notar um maior grau de sustentabilidade ambiental do projeto mediante o consórcio de ambas as atividades produtivas.</p><p align="center"><strong><em>Perspectives of economic and environmental viability: Integration between fish farming and irrigated fruit production in São João do Piauí (PI)</em></strong></p><p><strong>Abstract</strong><strong>: </strong>Piauí presents itself as an excellent field of work in assessing the viability of actions that aim at productive inclusion, product diversification and increased productivity leading to the evaluation of the use of social technologies in promoting development sustainable regional. This work seeks to make an economic and environmental feasibility of the use of Piauí river waters in fish farming and its subsequent reuse in irrigation activities. São João do Piauí state Piauí is a sample space of great interest in evaluating the viability of these actions, because it is located in semiarid region with serious problems of infrastructure and income distribution as well as being host to the development of a bulky irrigation project.. An estimation of the financial return generated by the integration between a fish farm and an irrigated fruit tree was carried out, through the collection of data demonstrating the income of these activities in other municipalities in northeastern Brazil. In addition, evaluate the environmental feasibility of the consortium between both crops, based on the study of sustainability indicators calculated with data from secondary sources. From the economic estimates made, an evaluation of the economic feasibility of the association of productive chains was verified, as well as a greater degree of environmental sustainability of the project through the consortium of both productive activities.</p>

scholarly journals Freight Transportation Demands on the Upper Mississippi and Illinois Rivers

2010 ◽  
Author(s):  
Tun-Hsiang Yu ◽  
Jin Zhang ◽  
Stehen Fuller
Keyword(s):  
Detailed Analysis ◽  
Water Level ◽  
River Water ◽  
Freight Transportation ◽  
Economic Feasibility ◽  
Seemingly Unrelated Regression ◽  
Transportation Infrastructure ◽  
Unrelated Regression ◽  
Structural Demand ◽  
Grain Transportation

This paper estimates structural demands for grain transportation on the upper Mississippi and Illinois Rivers. Grain is the predominant commodity transported on these waterways. Analysis indicates Seemingly Unrelated Regression (SUR) to be a superior method for estimating each waterway's structural demand. Results show rates, foreign and domestic demands, floods, season, and river water level influence demands. Further, the analysis suggests that a detailed analysis of river freight demand is a necessary precursor of a defendable study into the economic feasibility of improving transportation infrastructure on the upper Mississippi and Illinois Rivers.

scholarly journals Economic and environmental feasibility study of water hyacinth briquette in Cirata Reservoir

2018 ◽  
Vol 74 ◽  
pp. 01001
Author(s):  
Tauny Akbari
Keyword(s):  
Feasibility Study ◽  
Rice Husk ◽  
Water Hyacinth ◽  
Eichhornia Crassipes ◽  
Economic Value ◽  
Payback Period ◽  
Economic Feasibility ◽  
Coconut Shell ◽  
Environmental Feasibility ◽  
Control Water

The aim of this study was to determine the economic and environmental feasibility of water hyacinth (Eichhornia crassipes) briquette. The economic feasibility was determined by the BCR, NPV, Payback Period, and BEP value. While the environmental feasibility was determined by the potential of water hyacinth briquette to control water hyacinth in Cirata Reservoir. Briquette A1P3 (the charcoal combinations of rice husk: water hyacinth 1:1 and the percentage of tapioca binder 5%.) was used in this research. The need of water hyacinth briquettes by a satay (tiny grilled chicken) seller and a grilled fish seller is greater than the need of charcoal and coconut shell charcoal. It shows that water hyacinth briquettes have a lower economic value than charcoal and coconut shell charcoal. A project of water hyacinth briquette processing is economically feasible with the assumption that all products sold because of the BCR value (1.1) > 1, and the NPV value (58,390,711) > 0, with Payback Period in 4.6 years and BEP 95,621.5 kg in 5 years. The use of water hyacinth briquettes by a satay and grilled fish trader at 20,949 kg briquettes/year has the potential to control water hyacinth in Cirata Reservoir of 0.02% per year.

scholarly journals Remediation of Polluted River Water by Biological, Chemical, Ecological and Engineering Processes

2020 ◽  
Vol 12 (17) ◽  
pp. 7017
Author(s):  
Hossain Md Anawar ◽  
Rezaul Chowdhury
Keyword(s):  
Water Treatment ◽  
River Water ◽  
Constructed Wetlands ◽  
Low Cost ◽  
Ecological Engineering ◽  
Water Diversion ◽  
River Ecosystems ◽  
Algae Removal ◽  
Secondary Pollution ◽  
Treatment Technologies

Selection of appropriate river water treatment methods is important for the restoration of river ecosystems. An in-depth review of different river water treatment technologies has been carried out in this study. Among the physical-engineering processes, aeration is an effective, sustainable and popular technique which increases microbial activity and degrades organic pollutants. Other engineering techniques (water diversion, mechanical algae removal, hydraulic structures and dredging) are effective as well, but they are cost intensive and detrimental to river ecosystems. Riverbank filtration is a natural, slow and self-sustainable process which does not pose any adverse effects. Chemical treatments are criticised for their short-term solution, high cost and potential for secondary pollution. Ecological engineering-based techniques are preferable due to their high economic, environmental and ecological benefits, their ease of maintenance and the fact that they are free from secondary pollution. Constructed wetlands, microbial dosing, ecological floating beds and biofilms technologies are the most widely applicable ecological techniques, although some variabilities are observed in their performances. Constructed wetlands perform well under low hydraulic and pollutant loads. Sequential constructed wetland floating bed systems can overcome this limitation. Ecological floating beds are highly recommended for their low cost, high effectiveness and optimum plant growth facilities.

Main Engineering Geological Problems and Evaluation on the Reservoir Engineering of Yellow River Water Diversion and Irrigation Area

2014 ◽  
Vol 580-583 ◽  
pp. 2071-2073
Author(s):  
Zhi Quan Huang ◽  
Tai Li Chen ◽  
An Ming Wang
Keyword(s):  
River Water ◽  
Engineering Geology ◽  
Yellow River ◽  
Water Diversion ◽  
Reservoir Engineering ◽  
Water Leakage ◽  
Irrigation Area ◽  
Reservoir Area ◽  
Reservoir Siltation

Engineering geology survey was carried out on the reservoir engineering of Yellow River water diversion and irrigation area, main engineering geology problem including leakage problem of reservoir area、shore stable and siltation problem around the reservoir、siltation problem of storehouse district, connected the river course and the pilot, water leakage river course、earthquake liquefication and immerse and salinification were analyzed and appraised, the corresponding project measure was proposed against the infiltrates of the storehouse district.

scholarly journals Ecological approach in the design of spaces of minimalism

Vestnik MGSU ◽  
2019 ◽  
pp. 1408-1417
Author(s):  
Yana B. Motruk
Keyword(s):  
Modern Architecture ◽  
Economic Feasibility ◽  
Green Spaces ◽  
Practical Significance ◽  
Modern World ◽  
Environmental Friendliness ◽  
Plant Environment ◽  
Sustainable Landscapes ◽  
Local Plant ◽  
Environmental Feasibility

Introduction. Minimalism in the architecture of the 21st century gains new principles for the formation of space, determined by the ideology of the time. In the modern world, more and more attention is paid to the technical characteristics of the created green spaces and their interaction with architectural objects. This is dictated by the need to form sustainable combinations of plant elements that can affect the energy efficiency of buildings, as well as create a psychologically and environmentally friendly environment. Materials and methods. The work was carried out based on a study of contemporary objects of landscape architecture implemented in the stage of implementation in the style of minimalism, designed on the principles of sustainability and environmental friendliness. Information about the facilities was obtained from published materials. In the process, methods of theoretical study, analysis, and generalization of the material were applied. Results. The analysis allows us to conclude the development and adoption of new principles for the formation of a contemporary spatial domain in the style of minimalism. The position of a more economical attitude to a historically formed landscape is revealed. The functional importance, environmental feasibility and economic feasibility of using combinations of plant space elements as an engineering part of the architecture are considered. The practical significance of the use of “restrained” assortment and orientation to local plant species in the design of green spaces is indicated. The principles of the formation of sustainable landscapes and the rationality of their application in the designed space are determined. Conclusions. The technical importance of landscaping the space is determined taking into account the principles of sustainability of the plant environment. The problems are formulated, the solution of which is possible by creating environmentally stable landscapes. The importance of studying the possibility of creating a self-sufficient environment in the dynamics of the development of modern architecture is indicated.

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