Simulation and Risk Assessment of Waterlogging Disasters in the Main Urban Area of Xi'an Based on GAST-SWMM Model by ZHANG Wenqing, HOU Jingming, WANG Hangang, WANG Chen, LU Pinpin, XU Hui

“…In order to effectively control urban waterlogging disasters,urban waterlogging process simulation based on a numerical model and urban waterlogging risk assessment based on multi-source fusion information have gradually become important non-engineering measures.Taking the central urban area of Xi'an City as the study area,this paper simulated the waterlogging process under rainfall conditions of 5 a, 10 a,30 a,50 a,and 100 a based on the GAST-SWMM model.Combined with the relevant hydraulic factors obtained from simulation,a multi-indicator assessment system was constructed by using natural factors and social factors as the framework for waterlogging risk assessment.The results indicate that the high-risk areas of waterlogging in the study area are mainly distributed on the urban central roads.Under various rainfall conditions,the difference in the proportion of low-risk areas between the multi-indicator comprehensive waterlogging risk assessment and a single waterlogging depth indicator ranges from -50% to -60%,while the difference in the proportion of medium-risk areas ranges from 45% to 60%.Therefore,it is of great significance to conduct urban waterlogging disaster risk assessment based on multi-source fusion information.…”
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Experimental Study on the Effect of Supercritical CO2 on Mechanical Properties and Fracture Characteristics of Longmaxi Shale by Ran Zhang, Hao Yan, Lin Yang, Kun Liao, Lei Tao

“…Conventional hydraulic fracturing techniques typically consume large amounts of water when producing shale gas. …”
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The Influence of Ground Fly Ash on Cement Hydration and Mechanical Property of Mortar by Jingjing Feng, Jianwei Sun, Peiyu Yan

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Pressure Drop Distribution in Smooth and Rib Roughened Square Channel with Sharp 180° Bend in the Presence of Guide Vanes by Venkata Ratna Rao.D, S. V. Prabhu

“…In rib roughened channels, ribs are configured on the top and bottom surfaces in a symmetric arrangement with an angle of 90° to the mainstream flow. Rib height-to-hydraulic diameter ratio (e/D) is maintained constant at 0.14 with a constant pitch-to-rib height ratio (P/e) of 10. …”
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Les réseaux d’alimentation en eau des pentes de la Croix-Rousse et de la presqu’île de Lyon by Jules Ramona

“…Until recently, work on the ancient hydraulics of Lyon had essentially focused on the upper city. …”
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The concept of the average stress in the fracture process zone for the search of the crack path by Yu.G. Matvienko, M.M. Semenova

“…The proposed model considers the size and orientation of the initial crack, normal and tangential loading due to rolling–sliding contact as well as the influence of fluid trapped inside the crack by a hydraulic pressure mechanism. The MATS criterion is directly applied to equivalent contact model for surface crack growth on a gear tooth flank.…”
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Well Interference Analysis of Shale Gas Wells Based on Embedded Discrete Fracture Model by Qing Zhang

“…Results show that well interference caused by hydraulic fractures mainly reduce the gas production of the parent well while the gas production of child well can be increased owing to the larger equivalent stimulated area. …”
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New Definition of Ultrafine Particles in Mine Paste and Its Relationship with Rheological Properties by Jincheng Xie, Dengpan Qiao, Runsheng Han, Tao Deng, Jun Wang

“…In this paper, the size range of ultrafine particles is defined by the Stokes sedimentation test and hydraulic coarseness method. The size range of ultrafine particles is affected not only by the geometric size of the particles but also by the physical characteristics of the particles themselves. …”
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Pengaruh Variasi Suhu dan Durasi Pengepresan pada Kualitas Lemak Kakao by Tyas Titi Nur Hasanah, Mohammad Prasanto Bimantio, Maria Ulfah

“…The pressing process uses a hydraulic press method for cocoa paste. This research design was carried out using two factors, namely pressing temperature with three levels: 50°C, 70°C, and 90°C, and pressing duration with three levels: 30, 40, and 50 minutes. …”
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Experimental characterization of a new sustainable sand concrete in an aggressive environment by Mohammed Mani, Meriem Fakhreddine Bouali, Abdelouahed Kriker, Abdelkader Hima

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Influence of Blade Profiles on Plastic Centrifugal Pump Performance by Hui Zhang, Lingfeng Tang, Yongtao Zhao

“…The optimization results were that D1 = 58 mm and D2 = 162 mm and β1 = 17° and β2 = 31°. The hydraulic efficiency was increased by 1.68%.…”
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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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TRACE assessment of density wave instability onset with void reactivity feedback under natural circulation by Paul Hurley, Yang Liu, Tomasz Kozlowski, Juliana P. Duarte

“…Experiments performed at the Karlstein Thermal Hydraulic Test Facility (KATHY) have reproduced the reactivity feedback mechanism in BWRs under ATWS conditions. …”
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Identification of subsurface cavities in urban environment by Boualem BOUYAHIAOUI, Abdeslam ABTOUT, Yasser BAYOU, Mohamed BENDALI, Hassina BOUKERBOUT

“…The gravimetric evidence suggest that the hydraulic drilling is not the cause of the observed phenomena. …”
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Normal and Accidental Scenarios Analyses with MELCOR 1.8.2 and MELCOR 2.1 for the DEMO Helium-Cooled Pebble Bed Blanket Concept by Bruno Gonfiotti, Sandro Paci

“…The aim of these analyses is to compare the results obtained with MELCOR 1.8.2 and MELCOR 2.1 in order to highlight the differences among the results of the main thermal-hydraulic parameters.…”
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Assembly Accuracy Analysis Method Based on Multi‐Stage Linearized Contact by Wenbin Tang, Yadong Li, Tong Yan, Min Zhang

“…The relationship between the assembly load and the deformation amount is established based on the related theories of contact mechanics and the geometric relationship between the assembly interfaces, thus enabling the prediction of the part's pose during the assembly process. Taking a multi‐way hydraulic valve as an object, by comparing the accuracy of pose prediction of the algorithm before and after adding nodes, it is proved that the proposed method can significantly improve the precision of assembly accuracy analysis.…”
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RELAIBILITY ASSESSMENT OF THE SOIL-WATER-RETENTION FOR UNSATURATED SAND SOILS by Mohammed Shakir Mahmood, Mustafa Jamal Abrahim, Salah Mahdi Saleh

“…The reliable findings of unsaturated sand soil tests and the impact of initial density on the hydraulic properties under various matric suction and net normal stresses are examined. …”
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Experimental Study and Numerical Solution of Poly Acrylic Acid Supported Magnetite Nanoparticles Transport in a One-Dimensional Porous Media by M. Golzar, S. F. Saghravani, M. Azhdari Moghaddam

“…The slurries with concentrations of 20,100 and 500 (mg/L) were injected into the bottom of the column under hydraulic gradients of 0.125, 0.375, and 0.625. The results obtained from experiments were compared with the results obtained from numerical solution of advection-dispersion equation based on the classical colloid filtration theory (CFT). …”
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Groundwater Single- and Multiobjective Optimization Using Harris Hawks and Multiobjective Billiards-Inspired Algorithm by AbdolGhafour Gerey, Amirpouya Sarraf, Hassan Ahmadi

“…In this study, in order to determine an optimum solution for groundwater drawdown, pumping rates were selected accompanied by three minimization objectives: minimizing shortage influenced by inability to supply, adjusted shortage index, and minimizing the degree of drawdown within predefined areas. To optimize hydraulic conductivity and specific yield parameters of a modular three-dimensional finite-difference (MODFLOW) groundwater model, the Harris Hawks optimization algorithm was used to minimize the sum of absolute deviation between observed and simulated water-table levels. …”
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Experimental Study on the Nonlinear Behavior of a Sailing Container Ship under Landslide-Induced Surges by Pei-yin Yuan, Ping-yi Wang, Yu Zhao, Mei-li Wang

“…The model test can compare and analyze the influences of different landslide volumes and navigation positions on the nonlinear behavior of ships, thereby proposing control methods and measures for safe sailing in waters with landslide-induced surges and providing a theoretical basis for disaster prevention and reduction in the channel of a reservoir area or a hydraulic structure.…”
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