Supervisory Monitoring Technology System for Key Drinking Water Sources in Guangdong-Hong Kong-Macao Greater Bay Area by CUI Fan, KOU Xinyue, FENG Youbin, XIE Yuning, HE Yingqing, ZHENG Ning

“…In order to resolve the contradiction between the high demand for water resources,water ecology and water environment in the Guangdong-Hong Kong-Macao Greater Bay Area (GBA) and the insufficient supervision capabilities in the water conservancy industry,and achieve the transformation from passive management to active management of key drinking water sources in the GBA,this paper carries out supervisory monitoring of key drinking water sources through remote sensing macro monitoring,UAV cruise monitoring,fixed-point monitoring and other intelligent monitoring technology system.The results show that:①After application of a supervisory monitoring technology system for key drinking water sources,the full-coverage,dynamic and quasi-real-time monitoring of 35 key water sources in the GBA is realized,and the risk sources and water problems can be identified efficiently.②For identifying five suspected risk sources in water source areas,namely construction projects,key river (reservoir) tributaries,temporary shipping stops,material stacking places,agricultural production activities by remote sensing macro monitoring and UAV cruise monitoring,the accuracy rate is 65.7%.③For the chlorophyll a and COD_Mnmonitoring of the water source of main Guangzhou-Dongguan-Huizhou Dongjiangbei River by remote sensing macro monitoring and artificial fixed-point monitoring during the same period,the monitoring results of the two technical means are in good agreement.Therefore,with application of the technology system in supervision and management of key drinking water sources,the smart water conservancy supervision and business management are deeply integrated,and the effective technical means for supervision and management are available.…”
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Quasi-3D model to simulate flow in straight channels within vegetation patches by Sahat Maruli Simanjuntak Yogi, Uchida Tatsuhiko

“…Understanding the interaction between flow dynamics and riparian vegetation is essential for effective river management and conservation of the river environment, including the river ecosystem. …”
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Research on Flood Control and Drainage Simulation of Artificial Water Networks Based on SWMM Coupled with HEC-RAS by XIA Minghui, YIN Shiyang

“…The flow through each gate is proportional to the river channel's bottom width, and the fluctuation degree of each process line of each gate is inversely proportional to the river channel's bottom width. …”
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Analysis and Evaluation of the Effect of Different Connection Types on Water Quality of Huixian Wetland by WEI Chunyi, XU Baoli, MA Huijuan, DAI Junfeng, FANG Rongjie, XU Jueming, ZOU Chuanlin

“…In order to figure out the effect of different connection types on the water environment of wetlands,the riverside wetland,river-connected pond wetland,and isolated pond wetland in Huixian town,Guilin city,were taken as the research objects.The single factor evaluation method,comprehensive pollution index method,and universal exponential formulas for logarithmic power functions were used to evaluate water quality and eutrophication of the wetlands.The results showed that:① the concentrations of ammonia nitrogen (NH⁺₄-N),nitrate nitrogen (NO₃-N),total nitrogen (TN),total phosphorus (TP),and chemical oxygen demand (COD_Cr) in Huixian wetland were 0.07~1.22、0.01~1.24、0.45~3.95、0.04~0.29、6.19~120.28 mg/L,respectively.The average concentration of NH⁺₄-N and TN in the riverside wetland was higher than that of the other wetlands,while the concentration of NO₃-N in the river-connected pond wetland was the highest.Moreover,the concentration of COD_Crin the isolated pond wetland was the highest,and its TP concentration had the most significant fluctuation;② The water quality in Huixian wetland with different connection types was defined as inferior class V,with TN and COD_Cr as the major water quality factors exceeding the standard,and the wetlands all were in eutrophication.This study can provide a scientific basis for water environment governance and restoration of different wetlands in Huixian.…”
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Amplification Effect of Ground Motion in Offshore Meandering Sedimentary Valley by Hailiang Wang, Shaomin Yan, Zhongxian Liu, Xinglei Cheng

“…The displacement amplitude of the surface was proportional to the depth of the river valley, and the surface displacement was presented in different forms based on the frequency of the excitations. …”
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Application of One-Dimensional Hydrodynamic Model in Water Storage at the End of Flood Seasons for Changzhou Reservoir by LIAO Xiaolong, ZHONG Yixuan, HOU Guibing, JIN Gaoyang

“…Scientific selection of the timing and time for pre-discharge is one of the key techniques and decision bases necessary for conducting reservoir pre-storage at the end of flood seasons.For channel reservoirs,the water level decline in the reservoir area usually lags behind that at the dam sites,which must be fully considered to avoid the submerging loss of the reservoir area and the increase in flood risks for downstream areas due to untimely pre-discharge.In this research,with the mainstream of Xijiang River,Changzhou hydro-junction,as the research object,a one-dimensional hydrodynamic model is built on the basis of the measured data of river sections in the Changzhou reservoir area to study the effects of water storage at the end of flood seasons.The model parameters are calibrated and validated using observed flood data.The results reveal that pre-discharge should be executed for the Changzhou reservoir to the water level of 18.6 m when the inflow forecast within 3 d exceeds 11 800 m³/s,and a rising water regime is expected.It takes 2.6 d,3.2 d,and 3.7 d for the pool level to be lowered to 18.6 m from 19.6 m,20.1 m,and 20.6 m,respectively,which is about 1.3~2.3 d earlier than the time needed for the reservoir water level to lower to the corresponding water levels.The study provides a useful technical reference for the optimization of water storage at the end of flood seasons in the Changzhou hydro-junction and also lays a scientific foundation for determining the pre-discharge timing and time of channel reservoirs.…”
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Study on the Fracture Behavior of Cracks Emanating from Tunnel Spandrel under Blasting Loads by Using TMCSC Specimens by Bang Liu, Zheming Zhu, Ruifeng Liu, Lei Zhou, Duanying Wan

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The Propagation of Landslide-Generated Impulse Waves and Their Impacts on the Moored Ships: An Experimental Investigation by Ping Mu, Pingyi Wang, Linfeng Han, Meili Wang, Caixia Meng, Zhiyou Cheng, Haiyong Xu

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Opposing trends in the peak and low ozone concentrations in eastern China: anthropogenic and meteorological influences by Z. Wang, Z. Wang, C. Shi, C. Shi, H. Zhang, H. Zhang, X. Ji, Y. Zhu, C. Xia, X. Sun, X. Sun, X. Lin, S. Yan, S. Wang, Y. Zhou, Y. Zhou, C. Xing, Y. Chen, Y. Chen, C. Liu, C. Liu, C. Liu, C. Liu

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Gaan Mawina, le Marouini (haut Maroni) au cœur de l’histoire des Noirs marrons Boni/Aluku et des Amérindiens Wayana by Marie Fleury

“…The purpose of this paper is to trace the history of the Marroons Boni also called Aluku and their journey across the Maroni (boundary river between French Guiana and Surinam) to escape Dutch soldiers sent on their trails. …”
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Watersheds – Functions and Management by Shukla Sanjay

“…A Watershed is a land area whose runoff drains into any stream, river, lake, and ocean. Watershed boundary is the divide separating one drainage area from another. …”
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The battle of Nedao. A new hypothesis by Tomislav Zaja

“…The battle’s location to this day is unknown, since its eponymous marker (the Nedao River) remains unidentified. While various hypotheses have proposed locations that are typically in the western half of the Carpathian Basin, this study argues that the battle took place on the southeastern fringe of the basin. …”
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Enjeux transfrontaliers en période de pandémie de la Covid-19 : le cas de la circulation sur l’Oyapock entre Guyane française et Brésil by Stéphane Granger, Gutemberg de Vilhena Silva

“…In the middle of the Amazon, the Oyapock River separates the French Collectivity of Guiana and the Brazilian state of Amapá. …”
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Les eaux transfrontalières fédératrices d’une hydro-diplomatie environnementale ? Analyse comparée du Danube et du Jourdain by Bastien Richard

“…We show that while these agreements do not directly resolve the obstacle of the territorial sovereignty of States and political issues as in the case of the Jordan River basin, nor that of the quantitative sharing of transboundary waters, they do create spaces for dialogue federated by environmental issues as shown in the case of the Danube River basin, tempering unilateral actions and contributing smoothly to a redistribution of roles towards non-state actors.…”
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Watersheds – Functions and Management by Shukla Sanjay

“…A Watershed is a land area whose runoff drains into any stream, river, lake, and ocean. Watershed boundary is the divide separating one drainage area from another. …”
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Study on Optimal Utilization of Water Resources in Shiqiao Hydropower Station by ZHAO Yufeng

“…For the scientific,reasonable and efficient use of water resources,this paper establishes a multi-objective optimization and development model of Shiqiao Hydropower Station with the power generation and firm output as the goal,and the river ecological flow as the main constraint,builds a solution model by the mathematical simulation technology,and obtains the optimal operation and scheduling scheme of the hydropower station under inflow conditions in typical years for realizing the unity of economic goals and ecological goals of the hydropower station.With consideration of multiple factors such as ecology,topography and water resources,the No.15 scheme with annual power generation of 20.232 million kW·h and firm output of 1 336 kW is selected as the optimal operation and scheduling scheme of Shiqiao Hydropower Station under inflow conditions in typical years,in which the water resources of Shiqiao Hydropower Station can be fully utilized.…”
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Ultrasonic Testing Analysis of Concrete Structure Based on S Transform by Juncai Xu, Hai Wei

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Coupling Analysis of Research Methods for Hydrological Model Uncertainty by ZHENG Yanfeng

“…,coverage,average bandwidth and average asymmetry) to evaluate the interval properties of the dual E-G method in three river basins (i.e.,the Jiahe Basin,Tianhe Basin and Bahe Basin) and compared the proposed method with the GLUE method.The results show that the dual E-G method can improve three kinds of uncertainty indexes at the same time.The results can provide a useful reference for further study on hydrological model forecasting and flood decision-making risk analysis.…”
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Integrated Forecast of Monthly Saltwater Intrusion at Modaomen Waterway Based on Multiple Models by LU Pengyu, LIN Kairong, YANG Yugui, YUAN Fei, HE Yong

“…The increase of saltwater intrusion in recent years in Modaomen waterway, Pearl River Delta in China, has threatened the freshwater supply in the surrounding regions. …”
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Les points de contrôle routier en Guyane française : des postes-frontières comme les autres ? by Thierry Nicolas

“…Nearly a hundred kilometers from the Maroni River and about 80 km from the Oyapock River, these «checkpoints» managed by the National Gendarmerie testify to the establishment of zones of inward flexibilization of the borders.…”
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