Outlier Detection Based on Multivariable Panel Data and K-Means Clustering for Dam Deformation Monitoring Data by Jintao Song, Shengfei Zhang, Fei Tong, Jie Yang, Zhiquan Zeng, Shuai Yuan

“…A dam is a super-structure widely used in water conservancy engineering fields, and its long-term safety is a focus of social concern. …”
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Comparative Study on Pollutant Carrying Capacity of Plain Sluice-controlled River under Different Water Diversion Scale by YU Ting, CHEN Yanfei, ZHOU Chi, WU Xuejie, ZHANG Xiulian, CHEN Yunmei, CHEN Xiaoqun

“…Water pollutant carrying capacity refers to the maximum allowable pollutant carrying capacity in water body on the basis of meeting the water environmental quality standard of water function area.The calculation of pollutant carrying capacity is of great practical significance to the rational development & utilization and effective protection of water resources.Water conservancy projects such as sluice gates in rivers and lakes will change the hydrological process of rivers and lakes,thus affecting the pollutant carrying capacity of rivers and lakes.Taking the Tongshun River,a typical sluice-controlled river seriously disturbed by human beings,as the research object,this paper analyzes the pollutant carrying capacity of the main stream of Tongshun River under three conditions,namely 10 m³/s,13 m³/s and 15 m³/s,of the intake flow of Zekou sluice by the model method and pollution load method.The results show that different diversion scales have different effects on the pollutant carrying capacity of sluice-controlled river,and there is no complete positive correlation under the restriction of multiple parameters.With the continuous progress of water pollution control projects,the larger the scale of river diversion,the smaller the amount of pollutants need to be reduced.The calculation scheme presented in this paper can provide the basis for the establishment of scientific and feasible sluice dam regulation rules in Tongshun River,and also offer countermeasures and measures for river regulation.…”
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Attribution Identification of Runoff Changes Based on the Budyko Elasticity Coefficient Method: A Case Study of the Middle and Upper Reaches of the Jinghe River in the Yellow River... by Xueliang Wang, Haolin Li, Weidong Huang, Lemin Wei, Junfeng Liu, Rensheng Chen

“…., construction of water conservancy projects), precipitation, and potential evapotranspiration are the main factors contributing to the change in runoff.…”
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Design Flood Calculation Model for Extra-Small Watersheds in Ungauged Basin by Yun Wang, Zengchuan Dong, Xinhua Zhu, Wenzhuo Wang, Yupeng Liu, Ronghao Chen, Yunjia He

“…Designing floods in ungauged watersheds with limited data is a significant challenge in water conservancy projects. To address this, the method of calculating the design flood peak and flood volume using the weighted average method was proposed, which is based on the instantaneous unit hydrograph method and the inference formula method, combined with the characteristics of heavy rainfall floods in ungauged watersheds. …”
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Permeability Experiment of Fractured Rock with Rough Surfaces under Different Stress Conditions by Zilong Zhou, Jing Zhang, Xin Cai, Shanyong Wang, Xueming Du, Haizhi Zang

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Spatial Dimension Analysis and Judgement of Abnormal Rainfalls by GAO Yueming, LIN Qinghua, LIU Shupiao, XU Chaoyang

“…The automatic reporting system of water levels and rainfalls is widely used in flood control,hydrology,and meteorology in China.The automatically measured rainfall data is one of the conditions triggering flood control early warning,and its quality and accuracy directly affect the credibility of the warning.In order to avoid false warnings,it is necessary to analyze and filter abnormal rainfalls in real time.This paper explored the correlation of rainfalls in spatial planes and compared the application effects of four statistical methods including the Pauta criterion,Chauvenet criterion,Grubbs test,and Dixon test in the spatial dimension,so as to infer whether the rainfall at a certain point is abnormal.Specifically,the Chauvenet criterion has the optimal comprehensive performance,and its accuracy,precision,recall rate,and F1 score are 0.86,0.78,0.83,and 0.80,respectively.In addition,the Grubbs test and Dixon test obtain similar results,but they both are slightly worse than the Chauvenet criterion since there may be many abnormal rainfalls in regional groups.The Pauta criterion has the worst performance,but its precision is the highest,which is 0.97.In addition,it is effective to optimize rainfalls that have been judged to be abnormal many times by algorithm flows,and the algorithm precision can be significantly improved.It has been proved that it is feasible to judge whether the rainfall at a certain point is abnormal from the spatial plane,which can effectively help water conservancy supervision departments to improve the quality of early warning and reduce labor costs.…”
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The Shear Damage Model of the Two-Component Forming Polymer Grouting Material-Bentonite Contact Surface by Hao Zhang, Mingrui Du, Yan Zhao, Liangqiong Chen

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Safety Risk Evaluation of Large and Complex Bridges during Construction Based on the Delphi-Improved FAHP-Factor Analysis Method by Teng Ji, Ji-Wei Liu, Qing-Fu Li

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Research on Terminal Agricultural Water Price Model Based on Multi-Factor Discussion by LI Jianguo, JIA Dongmei

“…In recent years,as the comprehensive reform of agricultural water price continuously deepens,regions have made some remarkable achievements.The key to the reform of the water price is to build a scientific and reasonable formation mechanism for agricultural water price.After deeply analyzing the influencing factors of agricultural water price,this paper summarizes that the endowment condition of water resources,the affordability of users,the cost of water supply,and the reasonable allocation of cost water price are the key factors affecting the composition of terminal agricultural water price.In order to obtain a more reasonable terminal water price,the authors incorporate the above factors into the calculation model and modify the terminal water price.On this basis,with the comprehensive reform pilot of agricultural water price in a county as an example,the terminal operating cost water price,full cost water price,and two-part water price in the pilot area are calculated.Compared with the current irrigation water price,the terminal water price calculated under different years is higher than the current price.Since the pilot area is in the early stage of reform,the authors propose that the water supply price can be raised to the operating cost price,so as to ensure the reasonable funds required for the normal operation of water conservancy projects.In the later stage,as the comprehensive reform of agricultural water price continuously deepens,the water supply price can be gradually raised to the full cost price,so as to give better play to the economic leverage role of the price mechanism.…”
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Undrained deformation characteristic of saturated soft clay under traffic loading by Lei SUN, Yuke WANG

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Research on Ecological Runoff of Taohe River Basin Based on Interannual Runoff Variation by LU Jianyu, ZHANG Yude

“…Human activities, especially the construction of large-scale water conservancy projects, have greatly affected the consistency of the runoff, so it is of great significance to carry out the research on ecological runoff of the river basin based on interannual runoff variation. …”
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Mechanical Properties of Steel Fiber-Reinforced Magnesium Phosphate Cement Mortar by Hu Feng, Gang Chen, Danying Gao, Kunpeng Zhao, Chong Zhang

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Experimental Study on Compressive and Flexural Performances of Polypropylene Fiber-Reinforced Concrete by Yimeng Wei, Yuan Qin, Junrui Chai, Chengyong Xu, Yue Zhang, Xianwei Zhang

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Multiobjective Optimization Design and Experimental Investigation on the Axial Flow Pump with Orthogonal Test Approach by Yuquan Zhang, Yanhe Xu, Yuan Zheng, E. Fernandez-Rodriguez, Aoran Sun, Chunxia Yang, Jue Wang

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Research on Variation and Cause of the Multi-time-scale Extreme Runoff Series in the Mainstream of Xiuhe River Basin by ZHOU Qiuhong, LIU Cheng, WU Shaofei

“…Nowadays,with the influence of climate change and human activities,many hydrological elements,including extreme runoff,usually suffer from strong inconsistency.Taking the daily runoff series of Qiujin Station on the mainstream of Xiuhe River as an example,this paper discusses the variation of multi-time-scale extreme runoff series,that is,continuous maximum 1 day series Max1d,continuous maximum 3 day series Max3d,continuous maximum 7 day series Max7d,continuous maximum 15 day series Max15d and continuous maximum 1 month series Max1m in Qiujin Hydrological Station from 1956 to 2014 through hydrological variation diagnosis system,and analyses the reasons for the variation of multi-time-scale runoff series from the perspectives of precipitation, temperature and water conservancy project construction in the basin.The results indicate that:①The above multi-time-scale runoff series all suffered downward jumping variation in 1981,1983,1983,1977 and 1977,respectively;②Zhelin reservoir has a significant effect on the variation of multi-time-scale extreme runoff series of Qiujin station;③The precipitation in May were the main meteorological factor affecting the variation of the multi-time-scale extreme runoff in Qiujin station,while the monthly average temperature also has a significant impact on the short-term runoff series of Max1d and Max3d.This research can provide scientific basis for the prevention and treatment of flood and drought disasters and the restoration of water ecosystem in the mainstream of Xiuhe River Basin.…”
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Experimental Study on Bond Behavior of FRP-Concrete Interface in Hygrothermal Environment by X. H. Zheng, P. Y. Huang, X. Y. Guo, J. L. Huang

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Optimization of the heat transfer efficiency of a ground source heat pump heating system via FLUENT numerical simulation with fluid–solid coupling by Wei Wei

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Multi-Structure-Based Refractive Index Sensor and Its Application in Temperature Sensing by Zhaokun Yan, Shubin Yan, Ziheng Xu, Changxing Chen, Yuhao Cao, Xiaoran Yan, Chong Wang, Taiquan Wu

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Simulation and Impact Analysis of Flooding Caused by the Break of a Concrete-face Rockfill Dam by ZHAN Mingqiang, GUO Yurong, YANG Yanlong, CHEN Bo

“…Simulation and impact analysis of flooding caused by the break of water reservoir dams is a research priority in the field of prevention and mitigation of disasters surrounding water conservancy projects.To study the scope of submergence and the influencing degree in the downstream areas caused by the break of a concrete-face rockfill dam,by analyzing the characteristics of the concrete-face rockfill dam break,this paper built a one-dimensional unsteady hydrodynamic model of the area from the concrete-face rockfill dam to the hydroelectric power plant reservoir in the downstream.Then,with an actual concrete-face rockfill dam project as a research case,the flood flow distribution under various failure modes of the selected dam case was simulated.The peak flow rate,highest flood level,and the corresponding emergence time of typical sections along the watercourse under the dam were obtained.The results show that the dam-break duration,the final size of the breach,and the water level in front of the dam before the break are the three major factors influencing the simulation calculations with this hydrodynamic model.Shorter duration of dam break,a larger final size of the breach,and a higher water level in front of the dam before the break will lead to a larger peak flow at the dam site.Also,in various dam-break conditions,a large proportion of the major villages and towns on both sides of the downstream flow are expected to be completely submerged.These findings may offer reliable scientific references for the formulation of emergency response and rescue protocols as well as disaster severity evaluation associated with flooding caused by the break of presently active concrete-face rockfill dams.…”
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Mechanical Characteristics of Coal Samples under Triaxial Unloading Pressure with Different Test Paths by Yang Zhang, Yongjie Yang, Depeng Ma

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