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    Encounter Analysis between Strong Wind and Rainstorm of Reservoir Based on Copula Functions by CAI Qilin, XU Danli, WANG Zhaoli, LAI Chengguang

    Published 2021-01-01
    “…The purpose of this study is to discuss the encounter problem between strong wind and rainstorm in the coastal reservoirs.The Dalongdong Reservoir,located in Taishan of Guangdong Province,was taken as a study case.The P-III,Gamma and GEV functions were used to fit the marginal distributions between three groups of rainfall extremes and one group of maximum wind speed sequence respectively.The values of different return period of the maximum wind speed and maximum rainfall in different periods were also analyzed by Archimedean Copula and Kendall function.The return periods of ‘or’,‘and’,and Kendall return period as well as the most likely design values of wind speed and rainfall were calculated.The results showed that the annual maximum daily rainfall showed a significant uptrend (p<0.05) while the yearly maximum wind speed showed a downtrend.The correlation between wind speed and rainstorm sequence was extremely weak while maximum wind speed had encountered the annual maximum rainfall during the analysis period.The values of wind speed and rainfall based on ‘or’,‘and’,and Kendall return period were smaller than that of univariate marginal distribution,while the values of “or” were larger than those with univariate marginal distribution.The elevation of main dam based on “or” joint distribution of 100a return period was larger than the actual elevation.Accordingly,this study suggested considering the encounter between strong wind and rainstorm when designing the elevation of reservoir dam in the future.…”
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    Evolution and Differentiation of High-Quality Development of Marine Economy: A Case Study from China by Bo Li, Chuang Tian, Zhaoyuan Shi, Zenglin Han

    Published 2020-01-01
    “…The Bohai rim and Pan Pearl River Delta areas feature a mixture of cold and hot spots, with multipolar spatial differentiation; (3) in terms of development stage, Guangdong, Shanghai, Shandong, Zhejiang, and Tianjin are at advanced levels. …”
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    Research on Reservoir Emergency Dispatching under Sudden Water Pollution Incident——A Case Study of Hongshui River in the Upper Reaches of the Pearl River by BIAN Kaixuan, HUANG Qiang, YANG Yuanyuan, LIU Dengfeng, LIU Dong, HAN Zhiming, WAN Xin

    Published 2020-01-01
    “…The Pearl River is an important water source for Yunnan, Guizhou, Guangxi, Guangdong ,etc. It is extremely important to study the movement and diffusion process of water pollutants andthe countermeasures for sudden water pollution incident in this basin for water supply security.Assuming that an emergency event of substandard sewage discharging occurs approximately 12 kmdownstream of Longtan Reservoir (in Tian'e County, Guangxi) during the dry season, this paperformulates a reservoir emergency dispatching plan set, and simulates the movement process ofpollutants by the water quality model in the EIAW11 software package, and the concentration changeprocess of pollutants with different concentrations (taking BOD as an example)under differentdownstream sections and different river flows. …”
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    Evaluation of Coordination and Coupling Degree of Cross-Regional Influence of the Construction Industry Based on Regional Economic Factors: A Case Study of Beijing, Capital of Chin... by Likun Zhao, Yanqi Liu, Liwen Chen, Junsen Tian

    Published 2021-01-01
    “…The contribution of Beijing’s construction enterprises to northwest China has long been low, whereas its contribution rate to Tianjin, Hebei, and Guangdong Provinces is high. The regional difference is significant, showing a “catch-up effect.” …”
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