填海工程悬浮物对海域环境影响的数值模拟研究———以中国海监唐山维权执法基地建设工程为例 by 崔  雷, 孙钦帮, 姜恒志, 于大涛, 陈兆林, 张  冲

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Hydrodynamic and Water Quality Dispatching Simulation System in Zhongshun Dawei River Network by LIU Jin, CHEN Yechao, DING Wu, ZHANG Wei, LI Wen

“…The river system in the Pearl River Delta river network is complex with numerous embankments, among which the Zhongshun Dawei river system has the most complex structure and the greatest difficulty in the joint dispatching of sluices and pumps. …”
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Temporal and Spatial Distribution Characteristics of Rainstorm in China Based on CMORPH Integrated Precipitation by ZHAO Zixi, CHEN Zhihe

“…Based on the data set of China automatic station and CMORPH precipitation product fusion grid,this paper analyzes the spatial-temporal distribution characteristics and change trend of rainstorm number and rainstorm amount in 2008—2016 in China by the methods of rainfall object identification and Theil-Sen estimator.The research shows that there are 24 676 rainstorms in 2008—2016,including 20 135 small rainstorms,4 230 heavy rainstorms and 311 extremely heavy rainstorms.The rainstorm events in the whole year are at most in 2012 and at least in 2011with only 42,which occur frequently from May to September,accounting for 80.8% of the whole year.In 2010,2012 and 2014,the rainstorms in the coastal areas of South China and North China accounted for a relatively high proportion,some of which reached more than 60%.In 2008,2013 and 2016,the rainstorms in the coastal areas of South China and Hubei accounted for a relatively high proportion.From May to September,the rainstorm in China is widely distributed with large amount,mainly in the Pearl River Estuary,Northeast Jiangxi,and coastal areas of Hainan,Taiwan,Zhejiang and Fujian,with an annual average monthly rainstorm of about 150 mm.The number and amount of rainstorms are decreasing from the southeast coast to the northwest inland,with high value areas mainly in South China and the middle and lower reaches of the Yangtze River.The distribution of small rainstorms is similar to that of the total rainstorms.The heavy rainstorms are mainly concentrated in the coastal areas of Guangdong and Guangxi,the eastern Hainan and the southern Taiwan.Extremely heavy rainstorms are scattered in Southeast China.In the past 9 years,the number of rainstorms has increased,especially in South China and the middle and lower reaches of the Yangtze River,with significantly increased amount.…”
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Investigation and Application of Water-Saving Monitoring Technology in Public Institutions by WANG Kang, ZHENG Yongjie, ZHANG Zhen, TANG Yanping, SONG Wenhao, GUO Xiaoming

“…Considering the characteristics of water use and the current situation of water facilities in public institutions,this study comprehensively employs the Internet of Things (IoT),cloud deployment,databases,three-dimensional (3D) visualization,and other advanced techniques to create a water-saving reconstruction scheme with integrated software and hardware for public institutions.Therefore,a smart water management platform for public institutions is built to implement advanced water-saving concepts and improve the water management level.The main research results are as follows:① By intelligent remote monitoring equipment,the multiclass water measurement network is designed to realize the fine collection of zonal water use data;② this study designs a reconstruction scheme of water facilities and explores the utilization mode of unconventional water sources to improve the utilization efficiency of water resources;③ multiple algorithms and statistical methods are used to analyze the time series of water use data,and thus this study realizes the analysis of pipeline network leakage and damage,identification of water use anomalies,and water-saving statistical analysis,and the investigation of water use laws;④ the platform with functions of monitoring and early warning is established to achieve real-time remote monitoring of water use,statistical analysis of historical water use,and identification and warning of pipe network leakage,so as to detect water anomalies in time and save water.The research results are first applied to the construction of the water-saving institution of the Pearl River Water Resources Commission to build a benchmark for the construction of water-saving institutions in the southern region.On the basis of application experience,the comprehensively integrated monitoring technology for water-saving in public institutions is developed,which provides a new idea for public institutions to save water.…”
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HPV vaccine knowledge and willingness to vaccinate among senior primary school students in Guangdong province, 2022: a cross-sectional survey by Li WU, Yongxin LIANG, Zurui ZENG, Tiantian LI, Xiangcai WEI, Jianhong XIA

“…MethodsUsing stratified multistage cluster sampling and a self-developed questionnaire, 1 610 students in grades 5 and 6 from 7 primary schools in the Pearl River Delta region, eastern, western, and northern regions of Guangdong province were selected to participate in a self-administered, on-site, anonymous survey from June to October 2022. …”
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Temporal and Spatial Characteristics of Tidal Current in the Eastern Waters of Macao in Summer by FANG Shenguang, HUANG Chunhua, YU Fenghua, WANG Shijun, HE Yong

“…The eastern waters of Macao at the Pearl River Estuary are an important channel for water and sediment discharged by the west beach of Lingdingyang Estuary and Macao waterway.The measured data during the flood seasons shows that the waters feature semi-diurnal tidal currents,and the average velocity in this area is about 21~23 cm/s during the flood and 18~29 cm/s during the ebb.The flowing direction is stable,namely,N—NNW trending during the flood and S trending during the ebb,and tidal power is stronger in the south.The average velocity in the waters is mainly dependent on the tidal type,and the flood runoff mainly affects residual currents and tidal duration.A stagnant area is formed in the north of the waters during the flood,and the water and sediment in the south are transported outside the Lingdingyang Estuary.Wind on the sea surface has a significant impact on the vertical dynamic structure of flow in the range of 40% water depth,and residual flow direction in the range of 10% water depth near the sea surface has a good follow-up.During southwest wind,the maximum horizontal flow velocity gradient appears in the second flood and ebb stage and corresponds to the occurrence of the maximum sediment concentration in the tidal cycle.Due to the shallow water depth in the north of the waters,the bed shear gradient force is generally greater than that in the south.As a result,the sediment concentration observed in the north of the waters is significantly higher than that in the southeast.According to the comprehensive analysis,astronomical tides,flood runoff,and wind are the main controlling dynamic factors in the waters.The friction resistance of shallow water in the north is drastically larger than that in the south,which leads to a significant difference in tidal duration and phases of vertical floods and ebbs.As a consequence,the special vertical dynamic structure of convergence on the surface and dispersion at the bottom is formed in the waters,which is strengthened by massive freshwater runoffs during the flood seasons.This leads to the trend of surface diluted water drifting to the east and the invasion of the nearshore by bottom high-salt water.…”
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On the Design Criteria for Buried Steel Penstock of Hydropower Station by WANG Jin-long, DING Xu-liu, WU Xue-gao

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Study on the Bottom Diversion Outlets of the Three Gorges Project by TANG Li

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Design of Hydraulic Hoists for Eccentric Trunnion Sector Gates of Xiaolangdi Project by TENG Xiang, CHEN Xia

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Review of Major Hydraulic Modeling Results for Feilaixia Proje ct by XU Feng_jun, XIE Yu_feng, ZHOU Pei_ling

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Wind Speed-Independent Two-Source Energy Balance Model Based on a Theoretical Trapezoidal Relationship between Land Surface Temperature and Fractional Vegetation Cover for Evapotra... by Xiao-Gang Wang, Qing Kang, Xiao-Hong Chen, Wen Wang, Qing-Hua Fu

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Does Urbanization Exacerbate Asymmetrical Changes in Precipitation at Divergent Time Scales in China? by Fanggang Li, Xin Pan, Nan Xu, Xiangjin Meng, Zhiqing Li, Rufat Guluzade, Yang Dai, Yingbao Yang

“…Specifically, urbanization amplified asymmetrical changes in Yangtze River Delta, Pearl River Delta, Beibu Gulf, Middle Yangtze River, and Guanzhong, but exacerbated symmetrical changes in precipitation in some regions such as Chengdu‐Chongqing. …”
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Research on Assessment Method of Sediment Pollution in River and Lake by HUANG Senjun, ZHOU Yan, RONG Hua, ZHANG Ge

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Study on the Error Sources and Uncertainty Analysisof Groundwater Vulnerability Assessment by KONG Mengyuan, ZHONG Huaping, WANG Gaoxu, WU Yongxiang

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Effect of Wastewater Discharge of Aquaculture and ItsPrevention &Treatment Suggestion in China by WANG Chengcheng, JIAO Cong, SHEN Zhenyao, CHEN Lei

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Application of MBR Technology in Landfill Leachate Treatment by ZHONG Zhaohuang, LI Xindong, LI Haike, OUYANG Guozi, LI Lang, CAI Meng

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Mechanical Properties of Recycled Concrete with Hybrid Waste Polypropylene Fibers by YANG Chengzhi, PEI Changchun

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Research and Application of Datengxia Project Archives Management System by WANG Jue, QIU Shineng

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Application Design of Private Cloud of Enterprise Based on Water Resources Survey and Design ——A Case Study of Cloud Platform of Dongguan Water Resources Survey and Design Institut... by LIANG Qian, CHEN Guotao, ZHONG Rongguang

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Effect of Strength Activity Index of Fly Ash on Concrete Performance by YIN Shaoqing, WANG Chunhui, WU Qianwen, FANG Peng

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