Xinlei Guo

Xinlei Guo
China Institute of Water Resources and Hydropower Research | IWHR · Department of Hydraulics

PhD

About

82
Publications
59,676
Reads
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576
Citations
Introduction
Xin Lei Guo currently works at the Department of Hydraulics, China Institute of Water Resources and Hydropower Research. Xin Lei does research in Hydraulics, Ice Engineering and Environmental Science. Their current project is 'hydraulic transient for leak detection' and ' River ice engineering'.
Additional affiliations
June 2016 - present
China Institute of Water Resources and Hydropower Research
Position
  • Professor
June 2008 - present
State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, Beijing, China
Position
  • Engineer
Description
  • http://www.iwhr.com/IWHR-English/AI/Introduction/A580503index_1.htm
Education
September 2005 - July 2008

Publications

Publications (82)
Article
Full-text available
Moraine dam breaches occur suddenly and have severe consequences. However, breach-process prediction is challenging. Breach-notch excavation is crucial for risk reduction, but no consensus have been reached regarding the optimal notch shape. This study considers the typical characteristic parameters of the Jialongcuo glacial lake and trapezoidal, t...
Article
Water diversion projects in high-latitude areas often reduce the risk of ice jams in winter by reducing the water transfer flow, which might cause the waste of water transfer benefits. This paper establishes a real-time prediction system of water temperature in winter, which can predict the change in water temperature by inputting the air temperatu...
Article
Full-text available
In winter, the water transfer channel of the Middle Route of South-to-North Water Transfer Project (MR-StNWTP) in China always encounters ice problems. The preciously simulation and prediction of water temperature is essential for analyzing the ice condition, which is important for the safety control of the water transfer channel in winter. Due to...
Article
Full-text available
The formation of ice jams is sudden, and they will cause abnormal water level fluctuations in water diversion projects, affecting the water supply and even causing severe flood disasters. Based on the characteristics of the Middle Route of the South-to-North Water Diversion Project, this paper uses the numerical simulation method to establish an em...
Article
Full-text available
A surge chamber is a common pressure reduction facility in a hydropower plant. Owing to large flow inertia in the upstream headrace tunnel and downstream tailrace tunnel, a hydropower plant with upstream and downstream surge chambers (HPUDSC) was adopted. This paper aimed to investigate the operational stability and nonlinear dynamic behavior of a...
Article
Full-text available
Traditional discharge measurements in ice‐covered river channels are time‐consuming and costly, thus limiting the elucidation of flow patterns during winter. This study proposes an analytical model for quantifying the transverse distributions of the unit‐width discharge and the depth‐averaged streamwise velocity in ice‐covered channels by extending...
Article
Full-text available
The discharge of natural rivers is one of the important hydrological factors that are considered when responding to ice-flood disasters during ice periods. Traditionally, holes need to be dug along the cross-section on the ice cover to gauge velocity distributions along the flow depth at each hole, and to calculate the cross-sectional flow discharg...
Article
Ground-penetrating radar (GPR) is a non-contact measurement method widely used to determine ice thickness, which is an important hydrological parameter of rivers in winter. The accuracy of GPR measurements of ice thicknesses is highly dependent on the dielectric constant value of ice. Research on the dielectric constant of ice has mainly focused on...
Article
Longitudinal dispersion of multiple Microcystis patches is significant for understanding the mechanisms of Microcystis blooms in ambient waters. Presented in this paper is an analysis of multiple Microcystis patches in a turbulent open channel flow, based on the concentration transport equation. Results show that the total amount of Microcystis on...
Article
Mechanisms of active-particle transport in a wetland flow under wind are significant for understanding various biological and ecological processes associated with wetlands. A transport model has been formulated to characterize the transient dispersion of active particles in a typical free-surface wetland flow exposed to wind. The transient evolutio...
Article
The hydraulic ram pump is water-powered machinery using low-head hydroenergy. An overall mathematical model is presented to consider the dynamic behavior of the waste and delivery valves. Model experiments, numerical simulations and references analysis are combined to investigate the characteristics of pressure and water level fluctuations, the mot...
Article
Full-text available
Surge tanks (STs) are important facilities for ensuring the safety of hydropower stations. Reducing the ST size under the premise of ensuring stable mass oscillations within the ST is the main issue. First, according to the basic equations of the mass oscillation for a hydropower station with an ST, a novel expression of the critical stability sect...
Article
A concentration transport model has been formulated to characterize the transport of a mass of self-propelling active particles in an unsteady wetland flow at the phase-averaged scale. The vertical distribution and motion of mass center are rigorously derived for an active-particle cloud in the tidal wetland flow by use of the concentration moment...
Article
Sophisticated stage-discharge rating curves for radial gates are essential to modernization efforts in water conservancy and irrigation projects. However, it is a challenging hydraulic issue to accurately determine discharges through radial gates, especially when subjected to highly submerged flow conditions. According to the variation trend of jet...
Article
Accurate prediction of the discharge through radial gates is difficult. Existing calibration methods typically provide sufficient accuracy for free flows and submerged flows with jet Froude number at vena contracta larger than 1.7. However, their predictions are poor for submerged flows with jet Froude number less than 1.7. Based on the analysis of...
Article
Full-text available
Hydraulic ram pump is an automatic water-lifting machinery, which converts the low-head potential energy of a large volume of water into a small high-head potential energy through the periodic open and close of waste valve and delivery valve. The pump would run inefficiently or even fail if the valves are poorly designed. In this paper, a novel and...
Article
Full-text available
Quantitative and effective flood control operation of cascade reservoirs under emergency conditions can guarantee the safety of dams, reduce the social loss caused by flood disaster. A quantitative and practical risk analysis model of cascade dams overtopping breach (DAMSBREACH) has been developed based on the improvements to the analytical method...
Article
Ice blasting with explosives before the spring breakup of river sections is a preventive measure for ice flooding. Based on 496 datasets on ice cover blasting with No. 2 emulsion rock explosives measured in the Mohe reach of the Heilongjiang River from 2015 to 2018, we analyzed the relationships between the blasting-crater diameter and water depth...
Article
In cold regions, safe operation of inverted siphons might be threatened if incoming floating ice floes accumulate upstream of the inlet. An experimental study is conducted using real ice particles to simulate the ice accumulation phenomenon. The main objective is to gain a better understanding of the ice accumulation characteristics and the resulta...
Article
Full-text available
With the rapid increase of urbanization level in China, the accidents related to urban water supply pipe network occurred frequently due to the impacts of pipeline aging, environmental change and human factors, thus the health evaluation of urban water supply network has become one of the hot topics in recent years. Related researches mostly refer...
Article
The Colebrook equation gives the Darcy-Weisbach friction factor for fluid flow in pipes as a function of sand-grain roughness and the Reynolds number. Values of equivalent sand-grain roughness (k) have been obtained for various ductile iron pipes coated with different anticorrosion materials through fluid flow experiments, and the results show that...
Article
Understanding indicators for contaminant transport in wetlands under wind is essential to agricultural pollution assessment associated with chemical fertilizers and pesticides. Presented in this paper is an analytical study of indicators for contaminant transport in a periodical wind-driven wetland flow. Analytical solutions of velocity profile, to...
Article
Full-text available
With the rapid increase of urbanization level in China, the accidents related to urban water supply network occurred frequently due to the impacts of pipeline aging, environmental change and human factors, thus the health assessment of urban water supply network has become one of the hot topics of global scholars in recent years. Based on analysing...
Article
Full-text available
Many skeletonization methods are available to simplify the configuration of urban water distribution systems (WDSs) to enable hydraulic modeling and analysis. However, these approaches are generally based on steady-state hydraulic analysis, and hence the skeletonized systems cannot represent the underlying transient properties of the original syste...
Presentation
Full-text available
https://sciencetrends.com/using-double-frequency-ground-penetrating-radar-to-measure-ice-accumulation/
Article
Full-text available
This study evaluates the possibility of a cascade failure by developing a coupled breach-modeling platform based on onedimensional flow modeling of the river channel, flood propagation, regulation process of reservoir fluctuation, overtopping with breaching, and wave damping downstream. A hyperbolic model of the DB-IWHR was embedded into the platfo...
Article
Forecasting of ice jams and their breakup is crucial to prevent or reduce flooding risk in cold regions. A back propagation (BP) neural network model improved by the Levenberg-Marquardt clustering method has been developed with air temperatures and precipitation as inputs and applied for ice-jam forecasting in a given year in the upper reaches of t...
Article
Full-text available
Hydraulic models have been widely used to facilitate the design, management, and operation of water distribution systems (WDS). However, model parameters including pipe roughness coefficients (PRCs) and nodal demands (NDs) must be calibrated before practical applications, and the calibration accuracy and efficiency is important to enable their wide...
Article
Full-text available
A piano key weir (PKW) is a new type of labyrinth weir that increases the unit discharge at the unregulated spillway inlet of the weir. It is considered to be an important structure in water supply and drainage systems. However, its complex geometry makes it difficult to achieve an optimal hydraulic design, and only a few design equations and crite...
Article
In situ measurement of the ice thickness and water depth distributions in a river, canal, or lake is one of the most important means of measuring and responding to an ice flood. In view of the shortcomings of the use of single-frequency ground penetrating radar (GPR) for simultaneous measurement of ice thickness and water depth, a double-frequency...
Article
Full-text available
Ice blasting with explosives is an important method for mitigating or preventing ice jam floods during the spring breakup of frozen rivers. Successful blasting relies on properly determining the relationships between parameters including blasting crater radius, explosive weight, ice cover thickness, and water depth, though variations in the final t...
Article
A new shaft spillway composed of an inlet structure that includes inlet swirling-flow-generating piers, an annular weir, a vertical shaft, and an outlet structure is presented. Major factors influencing the inlet's discharge coefficient, including the number of piers, pier weir angle, weir head, and pier height are discussed. An empirical discharge...
Article
Full-text available
Complete characteristic curves of a pump-turbine are essential for simulating the hydraulic transients and designing pumped storage power plants but are often unavailable in the preliminary design stage. To solve this issue, a prediction method for the complete characteristics of a Francis pump-turbine was proposed. First, based on Euler equations...
Article
Full-text available
Hydraulic ram pump is an automatic water-pumping equipment generally used to pump drinking and irrigation water in mountainous and rural areas having short of power. In the past, it has been analyzed and optimized by fabricating various prototypes and conducting experiments and comparisons. This process is time and labor consuming and detailed flow...
Article
The accurate friction factor of pipeline is an important prerequisite during the hydraulic design process of water conveyance project. The equivalent sand-grain roughness is a key parameter to calculate the pipeline friction factor. However, it takes lots of manpower, material, financial resources and time to measure the equivalent sand-grain rough...
Article
Breakup ice jams occur during periods of thaw in many northern river courses, which is hard to predict because the formation and progression of breakup ice jams result from a complex interaction between hydrologic, hydraulic, and meteorological processes. Ice jam prediction methods based on artificial neural networks (ANNs) are desirable to provide...
Article
For overcoming disadvantages of single frequency radar system, this study presents a new double frequency radar system with 100 MHz and 1500 MHz working frequency to measure water depth and ice thickness at the same time. A RTK system is used in this system to collect GPS coordinates of measuring points. To avoid interference, 100 MHz and 1500 MHz...
Article
The risk of the whole cascade reservoirs of the earth rockfill dams under extreme operating condition is rely on the security of the control cascade reservoir. Such earth rockfill dam with extra height is classified into Class I and Class II dam based on the existing Chinese dam classification systems recently, but which one should design the unusu...
Article
To determine the conditions under which a pumped-storage power plant (PSPP) requires a tailrace surge chamber and to account for the time sequence superposition of water hammer vacuum, velocity head vacuum and head loss vacuum, we derived a new setting criterion using the rigid water hammer theory. Next, several setting criteria of tailrace surge c...
Article
The hydraulic ram pump, an automatic water-pumping device without any external energy input like electricity or oil, can be widely used in mountainous and rural areas short of power. To solve the issues of unavailable flow passage analysis, long development period and poor performance encountered with traditional means, evaluation indexes, includin...
Article
Breaking ice cover or ice jam is essential to prevent flooding in Alpine region. Field experiments have been conducted to study ice-breaking process with explosive in the upper reach of the Heilongjiang River(Amur River)for several years. It is observed that the water depth under the ice cover is a crucial factor affecting crater radius of the brea...
Article
In coastal nuclear power plants, bubble entrainment at the hydraulic jump in the siphon well causes foam pollution and salt fog erosion near the outfall of the siphon well. Thus, bubble elimination in siphon wells has been a topic of considerable interest. This study presents a new hydraulic performance optimization and bubble elimination method ba...
Article
Full-text available
To overcome the limitations such as commonly vortices in inlet and complicated cavitation control measures of vortex drop shaft spillway, a novel shaft spillway which consists of submersible and spiral-flow-generated piers and morning glory weir is developed. Compared with the traditional morning glory shaft spillways, such newly interior energy di...
Article
Full-text available
An artificial open canal was used to understand possible ice problems during reverse transfer in winter. A numerical ice–water modeling system using gates and pumps as inner boundaries has been established. A simplified equivalent transformation method for dealing with inner boundaries and a method for continuous simulation of the ice cover progres...
Article
Full-text available
Sixteen inverted siphons are in operation at the Beijing-Shijiazhuang section in the Middle Route of the South-to-North Water Diversion Project. Their safe operation is closely related to the safety and the water diversion efficiency of the whole project during an ice period. The ice accumulation process at the inlet of the inverted siphon is model...
Article
The concept of Piano Key Weir (PKW) is a new technique and trend used to rehabilitate numerous existing dams, which can increase the unit discharge at the unregulated spillway inlet for similar heads and widths. As it is a relatively novel structure, its hydraulic design remains problematic. The discharge capacity character is one of the most impor...
Article
The Middle Route Project for South-to-North Water Transfer, which consists of a long artificial open channel and various hydraulic constructions, is a big water conveyance system. A numerical modeling of water conveyance in the ice period for such large-scale and long distance water transfer project is developed based on the integration of a river...
Article
Full-text available
Uncertainty of model parameters greatly affects the simulation results, and subsequently affects the management and decision making. Based on the numerical modeling system of water conveyance in ice period for large-scale and long distance water channel, the study focused on parameter-induced uncertainty in modeling ice processes which including ic...
Article
Full-text available
Forecast on freeze-up water temperature is a basis for the ice condition. In this study, Adaptive-Network-based Fuzzy Inference System (ANFIS) and Artificial Neural Networks (ANN) are applied to the freeze-up water temperature forecasting in the Yellow River. Reasonable input parameters of the two models are determined through analyzing each model...
Conference Paper
In this paper, the adaptive-network-based fuzzy inference system (ANFIS) is adopted to forecast the freeze up water temperature of the Yellow River, which is the foundation for ice condition forecast. With its hybrid learning scheme, ANFIS is convenient for modelling the nonlinear multivariable process, for instance, in the case of modelling the hy...
Article
Full-text available
Logarithmic velocity distribution formula is commonly used to calculate vertical velocity, but Karman constant K, integral constant B and coefficient of wake strength ∏ cannot be confirmed at present. The value range of these three parameters and their effects on velocity calculation are studied in this paper. The precision, advantages and disadvan...
Article
For overcoming disadvantages of traditional ice-hydrodynamics experiments and model ice, an ice-hydrodynamics simulation platform is developed. This platform greatly improves precision and efficiency, extends simulation capacity, and provides a mean to research complex ice problems in winter. The platform integrates the experiment control SCADA sys...
Article
Full-text available
In a long-distance large-scale pipeline system, the detained air pockets during filling are usually considered that they have a significant impact on the conveyance efficient and safe operation. To assess the effect of detained air pockets, the sensitivity analysis of conveyance efficient is performed firstly. Based on the thermodynamic principles,...
Article
Full-text available
The average roughness height k of pipe is a key parameter in hydraulic calculation of pipe systems while it is also an important index for evaluating the manufacturing qualities of the same type of pipes made of different manufacturers. For a new type of pipes, the first thing from the view of point of hydraulics is to calibrate the value of k in h...
Article
Full-text available
The Kam Tin Main Drainage Channel (KTMDC) is an important river for the city drainage in Hong Kong. The roughness and its variations have an obvious effect on the flood control capacity and the flow capacity. So physical model tests are designed to study the KTMDC. Due to its complex channel structure, the tests are completed in two steps. In Step...
Article
Full-text available
The pipe water-filled process is a complicated hydraulic transient, in which the water flow experiences the transition from the unpressurized unsteady flow to the pressurized flow. Since it is lack of the relevant prototype and model observation data, ones know little on the pipe water-filled process. Based on the investigation of the hydraulic sim...
Article
Full-text available
The leak detection is of great importance in the reliable operation and management of a pipeline system. Recently, attention is shifted to the use of the time domain or frequency domain methods based on the transient analysis. These methods sometimes require accurate pressure signals obtained during the transient period or by creating ideal conditi...
Article
Full-text available
A further development of exclusively inverse frequency domain method for leak detection in pipelines is presented and validated. The location and leakage can be determined by analyzing the difference of transient water head response between the simulated and measured data in frequency domain. The transient signals are generated by portion sharp clo...
Article
The Adaptive-Network-Based Fuzzy Inference System (ANFIS) has been applied to forecast the ice condition. By using a hybrid learning procedure, the ANFIS is employed to model the nonlinear functions, such as the forecast. By analyzing the ANFIS structure, the characteristic of the water temperature data and the factors related to forecast, and comp...
Article
Full-text available
The Middle Route of South-to-North Water Diversion Project is a tree-type water conveyance system consisted of long distance open channel and various hydraulic constructions. For simulate the complicated ice processes due to the ice-water dynamic response characteristics, a numerical modeling system was developed based on the integration of the riv...
Article
Full-text available
A physical model test of pure frequency method for detecting pipeline leaks suggested by the authors was carried out to verify its effectiveness. It is found that if the pipe is not long enough or the closure time of valve is not short enough, the sufficient data of transient peaks could not be obtained for the analysis. Thus, short-duration transi...
Article
Full-text available
According to the swirling flow mechanism, a novel shaft spillway which consists of submersible blocks of spiral flow generator and flared weir was developed. The stable and swirling flow with air core in the vertical shaft can be generated under a variety of weir water head possille to eliminate negative pressure and to prevent cavitation. Besides,...
Article
Full-text available
Leaks in pipeline systems contribute to the damping and aberration of hydraulic transient events. Considering the effect of unsteady friction and leaks, the inverse transient model in time domain is established. The discrete grid and its calculation method are presented. The impact of changing leak size and position on the damping of pipeline trans...
Conference Paper
Consider the effect of unsteady friction and leaks, the frequency water hammer model which suitable for various different boundary conditions for water diversion projects is established, the discrete boundary conditions and measured data are transformed in frequency domain by laplace transform. A newly developing method called pure frequency domain...
Article
Full-text available
Based on the fact that leaks may directly affect the damping and aberration characteristics of hydraulic transient pressure waveforms in pipeline system, the location and leakage can be determined by analyzing the difference of transient water head response between system with leak and system without leak in frequency domain. Considering the effect...
Article
Full-text available
A pre-filter combined with threshold self-learning wavelet algorithm is proposed for hydraulic pressure signals denoising. The denoising threshold is self-learnt in the steady flow state, and then modified under a given limit to make the mean square errors between reconstruction signals and desirable outputs minimum, so the corresponding optimal de...
Article
Full-text available
A variable-scale method of 3D visual simulation was proposed for long distance water diversion projects with a vast terrain. Its character is that the scale of the elevation of the simulated object is different from that of the plane, which can make up the deficiencies of visual localization. Thus a virtual reality simulation system based on VC++ w...
Article
This paper describes a practical method to prevent the phenomenon of liquid-column separation in a pipeline by increasing the polar moment of inertia of the rotating parts of a pump-motor unit. Two examples are presented in detail. The examples indicate the following advantages of this method over other methods (e.g., installing air valves, air ves...

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What's the latest progress on leakage control using big data analysis in water distribution system?

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