南通濠河水系生态修复及其综合治理分析 by 曹锡军, 张英明, 崔延松, 高  柱

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磨子潭大坝测点4-5垛间坝基渗流量异常成因分析 by 曾建玲, 方朝阳

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L’aqueduc du Gier : nouvelles données sur le pont-siphon de Beaunant à Sainte-Foy-lès-Lyon (Métropole de Lyon) by David Baldassari, François Blondel, Stéphane Gaillot

“…Fifteen arches remain today.The excavation, motivated by the improvement in the state of the river, revealed the opus quadratum foundations at the base of two piers (17 and 19) and uncovered the well-preserved remains of a wooden frame used to carry out the opus caementicium for the foundation block of pier 18.On the right bank of the river, this operation made it possible, against all odds, to bring to light the foundation block of pier 17, whose 38° tilt easterly testifies to the violence of the bridge collapse. …”
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The measurement of microplastics in surface water and their impact on histopathological structures in wading birds of district Lahore by Shaza Mehboob, Khalid Mahmood Anjum, Hamda Azmat, Muhammad Imran

“…The highest MPs concentration was recorded in the main stream of the Ravi River, with an average concentration of 5,150 ± 7.5 particles/m3. …”
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Study on the Development Characteristics of Ductile Shear Zone andDeformation Response of Slope Excavation in a Hydropower Station by LU Bifeng, DENG Hui, HAO Hao, LI Anrun, LI Wancai

“…The high rock slope on the right bank of a hydropower station on Lancang river, which isto be built, is excavated for nearly 400 m.According to the on-site geological survey, the rockmass of the slope is hard and brittle dacite with strong unloading, and small and medium-sizedfaults developed in the slope.In addition, there are two ductile shear zones that dipping towardto the inside slope in the right bank slope,and mylonization occurs in the shear zone, which leadsto the very complex geological conditions and rock mass structure of the right bank slope. …”
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Spatiotemporal Variations of Water Pollution-Intensive Enterprises and Influencing Factors in China’s “Two Control Zone” Policy Using Spatial Statistics and Spatial Autoregressive... by Fuqiang Dai, Xia Zhang, Qing Li, Hao Liu

“…Further, a spatial autoregressive (SAR) model was used to examine the effects of enterprise agglomeration and environmental regulation on changes in the quantity of WPIEs in the Yangtze River Economic Belt (YREB) from 1998 to 2012. The results showed that the overall quantity of WPIEs in the YREB grew significantly, though growth in the downstream regions gradually slowed from 2005 to 2012. …”
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Mapeamento de vulnerabilidade socioespacial: Análise espacial integrada entre vulnerabilidade social e suscetibilidade a inundações em bacia hidrográfica urbanizada de São Paulo/SP... by Iury Tadashi Hirota Simas, Cleide Rodrigues

“…Using the scale of census sectors, the resident population’s social vulnerability and its location relative to the river plain compartments were correlated, obtaining a unified vulnerability index. …”
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Study on the Impact of Step Layout on Secondary Energy Dissipation and Flow Pattern of Spillway Tailwater by YANG Ruiguo, QIU Yong, CHEN Yubin, YUE Cuiyun, YIN Xingtang

“…A secondary energy dissipation is required between the sill underflow stilling basin and the downstream tailrace at the outlet of the Dabaitian Reservoir spillway in Fengqing County,Yunnan Province.At the same time,the stepped energy dissipation section is connected through a 40° bend to adapt to the change of terrain.Through the hydraulic model test research,based on the original plan,after the water flowing out of the stilling basin passes through the stepped bend,an obvious Z-shaped folded water flow is produced on the plane.When it occurs once in 30 years,the water velocity on the left side of the bend reaches 9.97 m/s,threatening the stability of the rock formations along the slope of the left bank.The modified plan of step backward movement can effectively improve the flow pattern in the bend.On this basis,an improved plan to reduce the size of the original step (2.50 m×1.50 m to 1.00 m×0.60 m) is proposed to avoid falling water flow at the location of the step in the case of frequent small-flow floods.The research results show that in the improved stepped energy dissipation combination for bend,the water depth distribution along the cross section of the tailrace downstream of the stilling basin is relatively even in the case of small-flow floods,and the flow patten is improved significantly,so the water flowing back to the river smoothly is realized under frequent flood discharges.…”
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Study on the Evolution of Water Gushing and Mud Bursting Process in Karst Tunnel by LEI Pengbo, XU Zhong, WANG Kunyun, HU Diyong, YANG Zhu, WANG Mengfei

“…With overall consideration of the influence of geological structure,hydrologic features, andconstruction,this paper abstractly generalizes the evolution of water gushing and mud burstingprocess in karst tunnel into four stages as follows:①The formation stage of karst geologicalenvironment provides geological conditions for the development and evolution of disaster-causingstructures;②The expansion stage of karst water system channel provides space for the storage andflow of water gushing and mud bursting; ③The critical state formation stage of karst watergushing and mud bursting is mainly affected by the disaster-causing mud & water body and theartificial excavation of tunnels; ④The energy release and depressurization stage of karst watergushing and mud bursting is the end of the whole process, indicating that the disaster hasoccurred.Based on case analysis,the water gushing and mud bursting in karst tunnel is divided into 11types in 3 classes according to different factors as follows: geological structure class (faulttype, syncline type, anticline type, lithology interface type), water gushing channel class(fracture type, pipe type, cave type, underground river type), and water gushing and mud burstingclass (water gushing type, mud bursting type, mud and water bursting type).The research results canprovide reference for the research on the control of water gushing and mud bursting in the tunneland the safety construction of the tunnel.…”
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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

“…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 Runoff Simulation of Arid Oasis Irrigation Area Based on SWAT Model by JIANG Mengyao, WANG Shuixian, ZHAO Zhigang

“…In order to study the runoff changes in the arid oasis irrigation area,this paper constructs a distributed hydrological model of Yanqi Basin based on SWAT model with the Chinese meteorological assimilation driving datasets (CMADS) from 1955 to 2017,traditional hydrometeorological station data,land use data,soil data,digital elevation data,analyzes the sensitivity of parameters by SUFI-2 (Sequential Uncertainty Fitting) algorithm,calibrates several important parameters influencing runoff simulation results through SWAT-CUP (SWAT Calibration Uncertainty Procedures) software,and verifies the model by the measured runoff from 1991 to 2017.The results show that:the simulated runoff of Yanqi Basin in Xinjiang for a long time scales coincides with the measured runoff.During the calibration period and verification period,the Nash coefficient (NES) is above 0.82,the Pearson correlation coefficient (R²) is 0.86 and 0.90 respectively,and the relative error (R_e) is less than 10.Therefore,SWAT model is well applicable to the runoff simulation of Yanqi Basin.Based on this,runoff changes from 2016 to 2100 in Yanqi Basin under the scenarios of RCP4.5 and RCP8.5 are simulated.It can be found that precipitation changes in Kaidu River basin have a significant impact on runoff in Yanqi Basin,that is,when precipitation increases by 20% and temperature increases by 2°C,the runoff increases by 26.53% compared with the current year.…”
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PROSPECTS AND CHALLENGES OF RESCUING THE SHRINKING LAKE CHAD THROUGH THE UNITED NATIONS’ GREEN CLIMATE FUND by DAIYABU HASSAN MUHAMMAD

“…The most viable plan is the idea of an inter-basin water transfer (IBWT), developed by the Italian Engineering Company Bonfica which involves diverting about 4% of the waters of the tributaries of River Bongi in the Democratic Republic of Congo (DRC) that discharge into the Atlantic Ocean through a series of canals and dams to River Chari (that feeds the Lake) in the Central African Republic (CAR). …”
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Construction Technologies of Self-compacting Concrete for Lining of Water Conveyance Shield Tunnel by SHI Aijun, WANG Yongjian, YAO Chukang, XIE Xiangming, WU Yulong, CAI Yixin

“…Some problems exist in the construction of composite lining of water conveyance shield tunnel,such as vertical transportation of self-compacting concrete (SCC) in deep work shafts,long-distance horizontal transportation of SCC in tunnels,and placing and casting of SCC in closed ring structures.In response to them,a transportation method and a placing mode suitable for SCC were chosen.The spacing of casting holes on the lined steel pipe (inner mold) was reasonably determined for SCC through a simulation test.Depending on the characteristics of the composite lining structure and the construction performance of SCC,related calculations and analyses are carried out for reasonable determination of the casting process and quality control measures such as the length of casting section,layer thickness,and placing speed.The determined parameters were applied in the pilot project of Shenzhen main branch of the Water Resources Allocation Project in the Pearl River Delta.We found that no aggregate separation occurred during the transportation of SCC,and the lined steel pipe did not float up or drift sideward during the casting of SCC.The drilling and coring test results showed that the height of the void between SCC and outer lining segment on the vault met the design requirements,and the lining space of closed ring structures was filled after backfilling and grouting.These results indicate that the SCC of composite lining is of good quality.Relevant construction technologies can provide references for the construction of similar projects.…”
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Research on Runoff Prediction Based on EMD-FBI-ELM Model by ZHANG Yajie, CUI Dongwen

“…,EMD-FBI-SVM,FBI-ELM and FBI-SVM.Finally,the EMD-FBI-ELM,EMD-FBI-SVM,FBI-ELM and FBI-SVM models are verified and analyzed with the annual runoff at the Gulaohe River Hydrological Station in Yunnan Province as a prediction example.The results show that the average relative error of the EMD-FBI-ELM model is 3.97% for the annual runoff prediction,which is 53.9%,81.7% and 86.5% lower than those of the EMD-FBI-SVM,FBI-ELM and FBI-SVM models,respectively.The EMD-FBI-ELM model is feasible for runoff prediction,and the model and optimization method can provide reference for relevant prediction research.…”
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Test Study on Construction Schemes of Mixing Pile in Low-moisture Content Silty Loam by ZHAO Manjiang, LI Peng, DU Zhijun, HAN Ze, ZHANG Yue, ZHU Changzhi

“…They are conducted in the context of the ground treatment of the cement-soil mixing pile used for the foundation of the Dongci drainage culvert and sluice, a sub-project of the Heibei Baigou River governance project (Zhuozhou part). The feasibility of the two schemes under the site condition is compared and analyzed by measuring data regarding the construction speed and compressive strength of cement soil. …”
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Visualising urbanisation and semi-urbanisation of rural migrants in China: a perspective from migration network and destination preference by Chenglong Wang, Jianfa Shen, Hengyu Gu, Dehao Shi

“…Our findings highlight distinct geographical patterns: urbanisation is concentrated in economically advanced regions such as the Jing-Jin-Ji, Yangtze River Delta and Pearl River Delta, while semi-urbanisation is more dispersed, driven by short-range migration flows. …”
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Spatiotemporally Combined Dimensionality Reduction Algorithm for Optimizing Long-term Operation of Multi-reservoir Systems by CHEN Jia, ZHANG Hanjun, XU Nan

“…To alleviate the “curse of dimensionality” and improve the solution efficiency while ensuring the quality of solutions in optimizing the operation of multi-reservoir systems,this paper proposes a spatiotemporally combined dimensionality reduction algorithm which integrates and improves the dynamic programming with successive approximation (DPSA) and the progressive optimality algorithm (POA).First,a chain-based successive approximation strategy is proposed to expand the DPSA's optimization mode from “single reservoir alternation” to “cascade reservoir chain alternation”,which makes up for the DPSA's shortcomings in dealing with the hydraulic coupling relationships among cascade reservoirs.Then,a dynamic variable decoupling strategy and perturbation mechanism are proposed to deal with the POA's blind search problem and dimensionality problem.Finally,the two improved algorithms are combined,in which the improved POA is applied to solving the optimization problems of cascade reservoir chains under the framework of the improved DPSA.The power generation operation problem of the cascade reservoirs in the Yuan River Basin of Hunan Province and the classical ten-reservoir problem are utilized to test the performance of the proposed algorithm.The proposed algorithm outperforms seven existing alternatives in terms of solution quality and efficiency.The results indicate that the proposed algorithm can effectively alleviate the “curse of dimensionality” in optimizing the operation of multi-reservoir systems,improve the efficiency while ensuring the quality of solutions and has potential to be applied to optimizing the operation of complex large-scale multi-reservoir systems.…”
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Improved Optimization for Wastewater Treatment and Reuse System Using Computational Intelligence by Zong Woo Geem, Sung Yong Chung, Jin-Hong Kim

“…River water pollution by wastewater can cause significant negative impact on the aquatic sustainability. …”
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Mottled Water Hyacinth Weevil Neochetina eichhorniae Warner (Insecta: Coleoptera: Curculionidae) by Eutychus Kariuki, Carey Minteer

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An Experimental Study on the Water-Induced Strength Reduction in Zigong Argillaceous Siltstone with Different Degree of Weathering by Yu-chuan Yang, Jia-wen Zhou, Fu-gang Xu, Hui-ge Xing

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