Showing 2,461 - 2,480 results of 8,205 for search '"river"', query time: 0.06s Refine Results
  1. 2461

    Le vocabulaire des directions cardinales dans les dialectes du continuum cri-innu-naskapi-atikamekw by Vincent Collette

    Published 2014-12-01
    “…The analysis of the morphology and the semantics of the words (particles, verbs and nouns) which express cardinal directions shows that these languages use four sources of lexicalization in order to name the cardinal directions: sun cycle, wind direction, river flow, wind/cardinal deity. The data from the Eastern dialects of the Cree-Innu-Naskapi-Atikamekw continuum indicate that in traditional societies the referent which serves as the source of lexicalization for cardinal directions (that is, river flow and sun cycle) is more salient than the direction itself and that some economic, social, cultural and religious changes, provoked by the presence of persons and institutions belonging to the dominant society may accelerate lexical overlaps and replacement in the lexical domain of cardinal directions.…”
    Get full text
    Article
  2. 2462

    Review on the Method of Compensation Benefit Allocation for Cascade Hydropower Stations by LI Yinghai, WANG Li, LI Qingqing, XIA Qingqing

    Published 2020-01-01
    “…Under the model of cascade rolling development,there are significant compensation benefits in the joint operation of cascade hydropower stations.Scientific and reasonable allocation of compensation benefits becomes the key point to realize joint optimal operation of cascade hydropower stations.This paper first expounds the present situation and existing risk in cascade hydropower station operation management,specifies the compensation benefit types and principles for compensation benefit allocation,summarizes and analyzes the main methods and application examples of compensation benefit allocation of cascade hydropower stations,discusses the applicable conditions and advantages and disadvantages of various methods,analyzes the shortcomings in application examples through existing research,finally proposes the future research direction for allocation of compensation benefits of cascade hydropower stations,so as to provide the reference for sustainable development and utilization of river basin water resources.…”
    Get full text
    Article
  3. 2463

    Application Research on Three-dimension Design of Gate Station Engineering Based on BIM Technology by LI Rang, HUANG Jinpeng, HU Xubao, CHEN Weihua, ZHANG Zhouwen

    Published 2023-01-01
    “…With the continuous promotion of BIM technology in civil and hydraulic engineering in China,the civil and hydraulic design industry has ushered in a new wave of technologies.Given the typical gate station projects in the Pearl River Delta region,the design and application research based on BIM is carried out.The concept of BIM technology and its application status in the water conservancy and hydropower industry are analyzed.Besides,the preparatory work before carrying out BIM design for gate station projects is described,and the various applications of BIM design such as parametric modeling,calculation and analysis,drawing and quantity,and scheme reporting are also introduced.Through this practice,the effectiveness of BIM technology in gate station engineering design is verified,which provides BIM application ideas for related engineering projects.…”
    Get full text
    Article
  4. 2464

    Optimization and Rule Analysis of Drawdown Level before Flood Season of Longtan Hydropower Station by LIU Yongqi, HOU Guibing, GAO Weishan, LI Yuanyuan, WANG Baohua, LI Peng

    Published 2023-01-01
    “…Longtan Hydropower Station is the controlled reservoir of the Hongshui River.It is of significance for flood control,water supply,and power safety to study the optimal drawdown level before flood seasons in this station.Based on analyzing the drawdown level and operation requirements of Longtan Hydropower Station,this paper develops an operation model for the optimal drawdown of the station and solves the model efficiently by the evolutionary algorithm.Then,the optimization rule of the drawdown level in Longtan Hydropower Station is analyzed in depth and derived based on the multi-year optimal operation scheme set.The results show that the multi-year average power generation efficiency of cascade reservoirs can be significantly improved by optimizing the drawdown level process before flood seasons in Longtan Hydropower Station.Additionally,the derived operation rule can provide technical support for actual operations.…”
    Get full text
    Article
  5. 2465

    Experimental Study on Frost Resistance of Nano-silicon Oxide-Rubber Recycled Concrete by LIU Liu

    Published 2021-01-01
    “…To study the frost resistance of nano-silicon oxide-rubber recycled concrete,this paper prepares the recycled concrete,with the substitution rate of recycled coarse aggregate and recycled fine aggregate of 30%,that of natural river sand by rubber powder of 0,1%,3%,5%,etc.and that of cement by nano SiO<sub>2</sub> of 0%,1.5% and 3.0% respectively,and conducts the freeze-thaw cycle test of nano-silicon oxide and rubber powder recycled concrete with different content.The experimental results show that:After addition of rubber powder and nano-SiO<sub>2</sub>,the frost resistance of recycled concrete is improved.As the freeze-thaw cycles reach 50,and the content of rubber powder and nano-SiO<sub>2</sub> is 5% and 3% respectively,the improvement on the frost resistance of recycled concrete is the best,and the strength loss rate is 45.5% lower than that of ordinary concrete.…”
    Get full text
    Article
  6. 2466

    Runoff Prediction Based on VMD-LSTM-ARMA Model by LUO Cankun, LIU Hao, HUANG Xin, SHAO Zhuang

    Published 2023-01-01
    “…To increase the accuracy of runoff prediction,a combined prediction model is proposed to solve the problems of runoff prediction.This model consists of the variational mode decomposition (VMD),long and short-term memory (LSTM) network,and autoregressive moving average (ARMA).To reduce the complexity of the incoming traffic,the runoff data is decomposed into three modal components with different frequencies by VMD.The low-frequency modal component inherits the temporal properties of the data and can be processed by constructing the LSTM prediction model,while the two high-frequency sequences are stationary time series and can be processed by constructing the ARMA prediction model.The prediction results of the three subsequences are superimposed to predict the runoff.Finally,the hourly flow data of Dongjiang Hydrometric Station of Xiangjiang river tributary in 2020 are used to forecast the inflow flow,and the results of comparative experiments with other algorithms show that the constructed model can effectively improve the accuracy of the hydrological forecast.…”
    Get full text
    Article
  7. 2467

    Les loisirs nautiques dans l’estuaire de la Seine : Médiations territoriales, consciences du milieu by Damien Femenias, Olivier Sirost, Barbara Evrard

    Published 2011-11-01
    “…This article explores the socio-natural reality of the Seine river estuary that has been constructed by the practice of water sports. …”
    Get full text
    Article
  8. 2468

    L’embouchure de l'Amazone, macro-frontière géomorphologique : enseignements de 30 années de recherches franco-brésiliennes sur les systèmes côtiers amazoniens (2e partie) by M. T. R. C. Prost, J-F. Faure, C. Charron, H.V. Borges, V. F. Santos, A.C. Mendes, A. Gardel

    Published 2018-04-01
    “…The Mouth of the Amazon River, considered to be the largest river on Earth, is a geomorphological macro-frontier between two coastal blocks : the Guiana Shield coastal plain (from Amapa to Venezuela) and the North Brazil block (Pará/Maranhão). …”
    Get full text
    Article
  9. 2469

    Le fleuve Nakambé et le réservoir de Bagré : facteurs explicatifs des recompositions territoriales et des mobilités villageoises agraires et sanitaires en Pays Bissa (Burkina Faso)... by Elodie Robert

    Published 2011-11-01
    “…Since the 1980s, the River Nakambé has been a structuring element of Burkina Fas’s landscape, in particular in the region of the Mossi and Bissa people. …”
    Get full text
    Article
  10. 2470

    Efeitos permanentes da poluição oriunda da ruptura da barragem da empresa Samarco em Mariana (Minas Gerais) sobre a planície costeira do Rio Doce, Espírito Santo by Cláudio Luiz Zanotelli

    Published 2024-08-01
    “…The article problematizes the effects, eight years later, on the coastal plain of the Rio Doce in Espírito Santo, Brazil, of waste from mining carried out upstream of the river in Mariana, Minas Gerais, by the Samarco-Vale-BHP Billiton corporation. …”
    Get full text
    Article
  11. 2471

    Stability Analysis of High Jointed Rock Slope with Steep Week Fracture Zone by HUANG Wenhong, ZHANG Jian, LI Longlong, PAN Bing, CHU Weijiang

    Published 2020-01-01
    “…The deformation of the rock mass towards the river valley is large, and the safetyfactor does not meet the requirements of the standard. …”
    Get full text
    Article
  12. 2472

    Evaluation on Security of Water Resources in Shiyan City Based on Water Poverty Index by JIANG Huining, YAN Baowei, HUO Lei, CAO Chen

    Published 2020-01-01
    “…Based on the basic concepts and calculation principles of water poverty index (WPI), thispaper takes the Shiyan City in the upper reaches of the Hanjiang River as the research object,selects 23 indicators from the aspects of resources, environment, society and economy, etc.…”
    Get full text
    Article
  13. 2473
  14. 2474

    Raconter la crise : les extrêmes hydrologiques au prisme de la presse locale (Drôme) by Emeline Comby, Yves-François Le Lay

    Published 2011-11-01
    “…The 1981 and 2008 editions of two local weekly newspapers were analyzed with the goal of studying attitudes toward the river, hydrological extremes and crisis management. …”
    Get full text
    Article
  15. 2475

    Faire ou défaire la frontière fluviale : penser et vivre l’Amou-Daria au x e siècle by Camille Rhoné

    Published 2022-12-01
    “…This article aims to study the Amu Darya as both a thought and a lived frontier, in a context of political fragmentation within the Caliphate, in order to shed light on the diversity of relations of powers and populations with this river frontier, in a multi-scale approach. Far from being a peripheral zone, this river is fully integrated into traffic networks and marked by regional and supra-regional power relations. …”
    Get full text
    Article
  16. 2476

    Application of Anti-slide Piles in Embankment Reconstruction Work on Soft Soil Foundation by YU Minlin

    Published 2021-01-01
    “…In order to study the influence of anti-slide pile layout on the anti-slide stability of the embankment reconstruction work on soft soil foundation,taking the Xindian section of Fenghua River embankment in Ningbo as the research object,this paper analyzes the anti-slip stability safety coefficient of the embankment with different length and spacing of anti-slides piles by the finite element software ABAQUS and the strength reduction method.The calculation results show that:The pile in shorter length may not have anti-slide effect yet.When the pile length increases the anti-slide stability safety factor decreases and then tends to be constant with the increase of pile spacing.Under the same pile spacing,the anti-slide stability safety factor of embankment increases and then also tends to be constant with the increase of pile length.Finally,by fitting the curve of anti-slide stability safety coefficient to the pile length and pile spacing,the piles with proper length and spacing are applied in this work.…”
    Get full text
    Article
  17. 2477

    Quelle échelle pour penser l'injustice environnementale ? by Solène Rey-Coquais

    Published 2017-12-01
    “…It plans the installation of two run-on-river dams with a total capacity of 531 MW upstream of the Maipo River, where the catchment area irrigates the entire region and supplies drinking water to more than 6 million people. …”
    Get full text
    Article
  18. 2478

    Research Progress and Prospect of Reservoir Intelligent Operation by WANG Sen, WANG Xiayu, JIA Wenhao, NI Xiaokuan, LIU Xia

    Published 2023-01-01
    “…Reservoir operation is an important tool to adapt to climate changes and prevent floods and droughts.With the continuously advancing digitization,a new generation of information technology has begun to integrate with traditional reservoir operations.Based on 445 references collected by CNKI from 2000 to 2023 and 412 references in the core collection database of Web of Science,this paper employs CiteSpace to analyze the status and trend of intelligent operation research.Meanwhile,it systematically sorts out two types of operation technologies including model building and model solving,and six types of information technologies containing knowledge graphs,the internet of things,big data,cloud platform,artificial intelligence,and digital twins.Finally,the intelligent operation provides new ideas for reservoir group operation in river basins,but it still needs further breakthroughs in fields such as thorough perception,data mining,universal model building,and intelligent decision-making.…”
    Get full text
    Article
  19. 2479

    A Sediment Rating-curve Method to Determine Sediment Discharge for Rainy Season in Micro-scale Watersheds by Atikah Sitorus, Edi Susanto

    Published 2019-04-01
    “…The sediment rating curve is an equation that connects the river discharge with sediment discharge, so that to obtain the sediment discharge, it is enough to use the river discharge data. …”
    Get full text
    Article
  20. 2480

    Tertúlia geográfica pelo Rio Madre de Dios by Ricardo José Batista Nogueira

    Published 2024-09-01
    “…Throughout the research, the importance and significance of the drainage network of the Madre de Dios River was identified, which, along its course, performs a strong work of erosion and deposition of its banks, causing problems in the urban areas it crosses. …”
    Get full text
    Article