Showing 321 - 340 results of 518 for search '"Yangtze"', query time: 0.04s Refine Results
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    Characteristics of Land Use Change and Evaluation of Ecological Sensitivity in Chongqing by XIE Xianjian, GOU Qiantao, WU Han

    Published 2024-12-01
    “…[Objective] Chongqing, as the economic center of the upper reaches of the Yangtze River in China and a barrier to ensure ecological security in the middle and lower reaches of the Yangtze River, is a typical ecological functional and fragile area in China. …”
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    Study on the Annual Variation Characteristics of Runoff in Yunnan by GU Guihua, LI Xuehui, YU Shoulong, DUAN Lusong

    Published 2021-01-01
    “…To study the annual variation characteristics of runoff in Yunnan Province and analyze the main influencing factors,based on the observed monthly and annual rainfall and runoff data of 9 representative hydrological stations in 6 major river basins in Yunnan from 1956 to 2016,this paper analyzes the annual runoff distribution in terms of the uniformity,concentration and relative variation range.The research shows that:①The uniformity coefficient (C<sub>u</sub>) of runoff distribution in many years ranges from 0.55 to 1.21,and the concentration (C<sub>n</sub>) ranges from 0.23 to 0.66,so the runoff is unevenly distributed in the whole province.②The C<sub>u</sub> and C<sub>n</sub> decrease in general.Especially after 2000,the annual distribution of runoff shows a trend of uniformity.③The runoff concentration is relatively high in the Yangtze River Basin and the Honghe River Basin,and the annual runoff distribution is flat in the Lancang River Basin and the Zhujiang River Basin.④The uniformity trend of annual runoff distribution is closely related to human activities in the basin.…”
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  10. 330

    Evaluation of Ecological Water Conservancy Benefits for Lakeside Cities Based on Principal Component Analysis by GU Xiaohan, ZHU Shijie, MAO Jinqiao

    Published 2021-01-01
    “…Lakeside cities are important intersection areas of natural land,lakes and urban ecology.Poyang Lake plays an important role in regulating the water level of the Yangtze River,conserving water resources,improving local climate and maintaining water security.In order to objectively and comprehensively measure the ecological water conservancy benefits of the lakeside cities around the Poyang Lake,taking the Gongqingcheng City as a typical case and the statistical analysis as a basis,this paper puts forward the evaluation index system qualitatively and quantitatively from three aspects of economic benefits,social benefits and ecological benefits,and constructs the evaluation model by the principal component analysis method.The results show that the score of ecological water conservancy benefits of the Gongqingcheng City in 2019 is 1.253 8,the ecological quality grade is Class III,the regional economy is well developed,and the ecological and social benefits are remarkable,which are consistent with the current ecological status of the Gongqingcheng City.Therefore,the model is featured with good applicability and rationality.…”
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  11. 331

    Study on the Water Ecology Protection and Water Environment Remediation Technology, focusing on the heavy metal removal by Zhao Zihan

    Published 2025-01-01
    “…China’s central government passed the Yangtze River Protection Law in response to the need for changes in governance arrangements and cooperation. …”
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  12. 332

    Coupling Coordination of Water Governance and Tourism: Measurement and Prediction by Yuqing Geng, Mukasar Maimaituerxun, Han Zhang

    Published 2020-01-01
    “…This study analyzes the correlation mechanism of the water governance-tourism system, constructs the composite and aggregated evaluation system which consists of 5 dimensions and 15 indicators, uses information entropy weight technique for order preference by similarity to an ideal solution method to evaluate the development degrees of both water governance and tourism growth of the 11 regions in the Yangtze River Economic Zone, analyzes the two subsystems’ relation of coupling coordination temporally and spatially with the coupling coordination degree model, predicts degrees of coupling coordination of the regions for the next 4 years with gray system prediction model, and proposes specific and generalizable countermeasures. …”
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    Impact of Labour Productivity Differences on Urban-Rural Integration Development and Its Spatial Effect: Evidence from a Spatial Durbin Model by Wei Wang, Yulin Zhu

    Published 2022-01-01
    “…The results show that there is a significant positive spatial agglomeration phenomenon in urban-rural integration in the Yangtze River Economic Belt. The convergence of labour productivity will not only promote local urban-rural integration but also inhibit the urban-rural integration development of other administrative divisions, but it can still play a positive role in promoting the urban–rural integration development of the whole region. …”
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    Analysis of Flow and Sediment Diversion at Three Outlets and Changes on FlatBeach Channel Morphology of Jingjiang River under the Condition of Fresh Water and Sediment by ZHOU Caijin, SHEN Jian, XIONG Hui, DU Xingqiang

    Published 2020-01-01
    “…The Jingjiang section at the middle reaches of the Yangtze River is connected toDongting Lake, the second largest freshwater lake in China through three-outlet channels, forminga complex relationship between rivers and lakes. …”
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