Hydro Nepal: Journal of Water, Energy and Environment最新文献

Evaluation on the TBM Performance at a Hydropower Project in Ecuador 厄瓜多尔某水电工程TBM性能评价

Hydro Nepal: Journal of Water, Energy and Environment Pub Date : 2019-04-10 DOI: 10.3126/HN.V24I0.23575

K. K. Panthi, J. Encalada

引用次数: 0

Indoor Air Quality Investigation at Primary Classrooms in Hamirpur, Himachal Pradesh, India 印度喜马偕尔邦哈米尔普尔小学教室室内空气质量调查

Hydro Nepal: Journal of Water, Energy and Environment Pub Date : 2019-04-10 DOI: 10.3126/HN.V24I0.23583

V. Shree, Bhanu M. Marwaha, P. Awasthi

引用次数: 3

How Does the Law and Policy Encourage Towards a Low Carbon Energy Transition in the Scotland? 苏格兰如何通过法律和政策鼓励低碳能源转型?

Hydro Nepal: Journal of Water, Energy and Environment Pub Date : 2019-04-10 DOI: 10.3126/HN.V24I0.23580

Md. Raisul Islam Sourav

引用次数: 0

Vulnerability Analysis to Prioritize the Reconstruction of Earthquake Affected Drinking Water Systems 地震影响下饮用水系统重建的脆弱性分析

Hydro Nepal: Journal of Water, Energy and Environment Pub Date : 2019-04-10 DOI: 10.3126/HN.V24I0.23577

Pabitra Gurung, C. Adhikari

{"title":"Vulnerability Analysis to Prioritize the Reconstruction of Earthquake Affected Drinking Water Systems","authors":"Pabitra Gurung, C. Adhikari","doi":"10.3126/HN.V24I0.23577","DOIUrl":"https://doi.org/10.3126/HN.V24I0.23577","url":null,"abstract":"In 2015, two massive earthquakes occurred in the central region of Nepal, killing more than 8000 people. The disaster destroyed many houses and public infrastructures and severely affected 14 districts in the central region of Nepal. Most of the affected people were disconnected from basic services such as safe drinking water. Being a basic human need, essential to live a healthy life, drinking water scheme rehabilitation project was initiated by many non-governmental agencies in coordination with the Government of Nepal (GoN). However, due to the limitation of the funds and time, most of the implementing agencies faced problems to prioritize schemes and the communities, which at first needed to focus to reinstate. Therefore, a vulnerable ranking method was adopted to distinguish the priorities to reconstruct damaged and totally destroyed water schemes in Dhading, Gorkha, Nuwakot, and Rasuwa districts of Nepal, which are the districts in the most earthquake affected region. In the process of vulnerability ranking, three major community level parameters and indicators were considered for the ranking. 1) Number of households without safe drinking water after an earthquake, 2) Number of households without improved sanitation after an earthquake, and 3) Disadvantage Group (DAG) ranking of the Village Development Committees (VDCs) of the districts. This process of ranking using community level parameters technique is able to substantiate a justice scientifically in front of the communities, government, donor, and other stakeholders in the selection of VDCs to rehabilitate the drinking water schemes.","PeriodicalId":137822,"journal":{"name":"Hydro Nepal: Journal of Water, Energy and Environment","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132213164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Role of Reliability Analysis in Structural Design 可靠性分析在结构设计中的作用

Hydro Nepal: Journal of Water, Energy and Environment Pub Date : 2019-04-10 DOI: 10.3126/HN.V24I0.23574

A. Mishra

{"title":"Role of Reliability Analysis in Structural Design","authors":"A. Mishra","doi":"10.3126/HN.V24I0.23574","DOIUrl":"https://doi.org/10.3126/HN.V24I0.23574","url":null,"abstract":"Modern structures require more critical and complex designs; the need for accurate and efficient approaches to assess uncertainties in loads, geometry, material properties, manufacturing processes involved and also the operational environment, has increased significantly. Reliability assessment techniques help to develop the initial guidance for robust designs. In this context, the classical methods such as theory of probability, statistical methods and reliability analysis methods are often used by structural engineers. Some of the methods which have been developed in the later stages include Monte Carlo Sampling, Latin Hyper Cube Sampling, First and Second Order Reliability Methods, Stochastic Finite Element Method and Stochastic Optimization. In addition, in those structural problems where randomness is relatively small, a deterministic model is usually used rather than a Stochastic Model. However, when the level of uncertainty is high, Stochastic approaches are necessary for system analysis and design. Number of probabilistic analysis tools have been developed to qualify uncertainties, but the most complex systems are still designed with simplified rules and schemes, such as factor of safety based designs. However, these traditional design processes do not directly account for the random nature of the most input parameters. Factor of safety is used to maintain some degree of safety in the structural design. Generally, the factor of safety is understood to be the ratio of the expected strength of response to the expected load. In practice, both the strength and load are variables, the values of which are scattered about their respective mean values. When the scatter of the variables is considered, the factor of safety could potentially be less than unity and the traditional factor of safety based design would fail. More likely is that the factor of safety is too conservative, which leads to an over expensive design.","PeriodicalId":137822,"journal":{"name":"Hydro Nepal: Journal of Water, Energy and Environment","volume":"2013 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128678311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Heavy Metal Assessment of Kavre Valley Basin River System Kavre流域水系重金属评价

Hydro Nepal: Journal of Water, Energy and Environment Pub Date : 2019-04-10 DOI: 10.3126/HN.V24I0.23581

S. Shakya, Prekshya Gurung, Anjal Bohaju, Dipson Ojha, B. Kafle

引用次数: 1

Reflections on India’s 2018 Guidelines on Cross Border Electricity Trading Vis-a-vis SAARC versus ASEAN 对印度2018年《南盟与东盟跨境电力交易指南》的思考

Hydro Nepal: Journal of Water, Energy and Environment Pub Date : 2019-04-10 DOI: 10.3126/HN.V24I0.23573

S. Pun

引用次数: 0

Engineering Geological and Geotechnical Approaches for the Construction of Powerhouse Cavern of Tehri Pumped Storage Plant (1000 MW) - A Case Study 特赫里抽水蓄能电站(1000mw)厂房洞室施工的工程地质与岩土方法——以工程地质与岩土工程为例

Hydro Nepal: Journal of Water, Energy and Environment Pub Date : 2019-04-10 DOI: 10.3126/HN.V24I0.23582

R. Prasad, Nishith Sharma

{"title":"Engineering Geological and Geotechnical Approaches for the Construction of Powerhouse Cavern of Tehri Pumped Storage Plant (1000 MW) - A Case Study","authors":"R. Prasad, Nishith Sharma","doi":"10.3126/HN.V24I0.23582","DOIUrl":"https://doi.org/10.3126/HN.V24I0.23582","url":null,"abstract":"Construction of underground Cavern in the Himalayan region is full of challenges and uncertainties. Experience has shown that construction in Himalayan regions requires good understanding of geology, adequate site investigations, proper design and selection of suitable construction methodology and technology. The most commonly encountered geological problems during excavation of underground structure in Hydroelectric Projects are, Fault/Thrust/Shear Zones squeezing and swelling, wedge block failure etc. Tehri Pumped Storage Plant (PSP) is located at the left bank of river Bhagirathi in the state of Uttarakhand in Northern India. This case study indicates about the geological challenges faced and their remedial measures during the construction of Tehri PSP Powerhouse Cavern having dimension of 203m x 24m x 58m.3D-geological mapping with 1:100 scales was carried out in excavated central drift of powerhouse to evaluate the rock composition, behavior of rock mass, structural features and further investigation to finalize the layout and orientation. During the investigation Sheared Phyllite with bands of thinly Phyllite Quartzite rock were encountered in the end portion of central drift of powerhouse which had posed a mammoth challenge in designing the powerhouse cavern. Keeping in view the recommendations of geotechnical experts and the design consultants, decision were made to shift the cavern further by 50 m to avoid Sheared Phyllite bands. The shifting of cavern led to the reorientation of structures like control room, service bay and location of units etc. This paper briefly describes the Engineering Geological and Geotechnical set up of powerhouse with proper investigation approaches and excavation sequences highlighting the importance of orientation and Sheared Phyllite Zone.","PeriodicalId":137822,"journal":{"name":"Hydro Nepal: Journal of Water, Energy and Environment","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132385346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rampant Development of Water Diversion Projects as a Threat to Fish Diversity: A Case of the Modi Khola 过度发展的调水工程对鱼类多样性的威胁:以莫迪河为例

Hydro Nepal: Journal of Water, Energy and Environment Pub Date : 2019-04-10 DOI: 10.3126/HN.V24I0.23576

Indira Sharma Bhandari

引用次数: 0

An Analysis of EIA Report of the Second International Airport Project, Nepal 尼泊尔第二国际机场项目环评报告分析

Hydro Nepal: Journal of Water, Energy and Environment Pub Date : 2019-04-10 DOI: 10.3126/HN.V24I0.23585

Shree G. Shah

{"title":"An Analysis of EIA Report of the Second International Airport Project, Nepal","authors":"Shree G. Shah","doi":"10.3126/HN.V24I0.23585","DOIUrl":"https://doi.org/10.3126/HN.V24I0.23585","url":null,"abstract":"Environmental Impact Assessment (EIA) is a planning tool which enables decision makers to accept environmentally friendly projects and reject environment damaging projects or their certain components. EIA has been mandatory in Nepal since the enactment of Environment Protection Act in 1997. Usually in Nepal, EIA is done for a project late in the project cycle after many important decisions on design and locations have already been made. While in case of government sponsored projects, EIA has remained as ‘pro forma’ compliance with government’s legal requirements. This paper analyses outputs of approved EIA of a mega infrastructure project “Second International Airport Project” which government wants to implement despite of protests by conservationists, and environmental and social activists. There are technocratic problems in EIA Report such as informational weaknesses, insufficient analysis of impacts, and inadequately proposed mitigations measures. It indicates political influence on EIA. This paper suggests making policy decision on size and nature of an international airport and its facilities, alternative locations avoiding ecologically sensitive area, and source of funding. It proposes to conduct a comprehensive Environmental and Social Impact Assessment (ESIA) complying with national and international environmental and social safeguards, before making any decision to fell trees.","PeriodicalId":137822,"journal":{"name":"Hydro Nepal: Journal of Water, Energy and Environment","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114854149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4