Xianqi Zhang's research while affiliated with North China University of Water Conservancy and Electric Power and other places

Publications (22)

Article
The prediction of river runoff is crucial for flood forecasting, agricultural irrigation and hydroelectric power generation. Coupled runoff prediction model based on the Gravitational Search Algorithm (GSA) and the Seasonal Autoregressive Integrated Moving Average (SARIMA) model is proposed to address the non-linear and seasonal features of runoff...
Article
In order to improve the accuracy of hydrological models for runoff prediction and to solve the problem of disappearing time series data break or data fluctuation due to the extension of time series. Monthly runoff data from 1996 to 2015 at the Cuntan hydrological station in the upper reaches of the Yangtze River are used as the basis to develop the...
Article
Full-text available
Industrial water consumption is a major component of the total regional water consumption. Accurate and scientific prediction of industrial water consumption is an essential guide to the rational use of natural resources. In this paper, we proposed a combined model of CEEMD (collective empirical modal decomposition) and ARIMA (autoregressive integr...
Article
Full-text available
Runoff forecasting is essential for the reasonable use of regional water resources, flood prevention, and mitigation, as well as the development of ecological civilization. Runoff is influenced by the intersection of many factors, and the change process is extremely complex, showing significant stochasticity, nonlinearity, and heterogeneity, making...
Article
Full-text available
Groundwater resources play an important role in life, but the lack of effective management of groundwater resources has led to a regional decline in groundwater levels. How to curb the over-exploitation of groundwater and realize the sustainable use of groundwater resources has become an important issue for ecological environmental protection. Ther...
Article
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The improvement of groundwater burial depth prediction accuracy is an important guiding significance for the development and management of groundwater resources. Groundwater burial depth sequence has the characteristics of uncertainty and nonlinearity. Variational mode decomposition (VMD) has a powerful advantage in dealing with nonlinearity. Wavel...
Article
River-crossing bridge engineering will change the hydraulic elements of the river and affect the stability of the river regime. The distance between the bridge piers is one of the most significant influencing factors of the river flow regime. Analyzing the impact of its changes on river flow through numerical simulation methods has significant guid...
Article
Full-text available
Scientific prediction of precipitation changes has important guiding value and significance for revealing regional spatial and temporal patterns of precipitation changes, flood climate prediction, etc. Based on the fact that CEEMD can effectively overcome the interference of modal aliasing and white noise, fine composite multi-scale entropy can reo...
Article
In recent years, ecological water replenishment has become the main means to improve the water environment of the reservoir. Considering the complexity of the water characteristics of the reservoir, it is very necessary to simulate the impact of water replenishment on the water environment. Based on the two-dimensional water environment mathematica...
Article
The analysis of annual precipitation evolution characteristics is of great value and significance for revealing the spatial and temporal variation patterns of regional precipitation, water resources development and utilization, short-term climate, drought, flood disaster prediction, etc. The Mann-Kendall (MK) mutation test, cumulative distance leve...
Article
Rainfall prediction is a very important guideline for water resources management as well as ecological protection, and its changes are the result of multiple factors with obvious uncertainties and nonlinearities. Based on the advantages of Complete Ensemble Empirical Mode Decomposition with Adaptive Noise (CEEMDAN) non-smooth signal decomposition,...
Article
The simulation of precipitation changes can provide references for the prediction and prevention of flood disasters, and has guiding significance for the comprehensive utilization of regional water resources. Precipitation forecasting is difficult due to the randomness and uncertainty of precipitation events. CEEMD can effectively overcome modal al...
Preprint
Full-text available
Scientific prediction of precipitation changes has important guiding value and significance for revealing regional spatial and temporal patterns of precipitation changes, flood climate prediction, etc. Based on the fact that CEEMD can effectively overcome the interference of modal aliasing and white noise, fine composite multi-scale entropy can reo...
Article
Full-text available
Scientific assessment of the hydrodynamic conditions of water system connection is of great significance and value in guiding the ecological construction of urban water system connection and building healthy river–lake relationship. Based on the advantages of SWMM in effectively simulating urban rainfall and surface runoff, a hydrological and hydro...
Article
Full-text available
Dengzhou City is the first ecological water recharge city after the commissioning of the South-North Water Diversion Project. A study on the ecological service value of Dengzhou City and its evolutionary characteristics can provide a theoretical basis for the water supply security of the Central Line Project and regional ecological environmental pr...
Article
Full-text available
The different shapes of bridge piers across rivers have a great influence on the river water movement, and the study of the influence of pier morphology changes on the water movement characteristics is of great value for bridge design and river flooding. The hydrodynamic model can effectively simulate and predict the changes of river flow patterns,...
Article
Full-text available
Precipitation forecasting is an important guide to the prevention and control of regional droughts and floods, the rational use of water resources and the ecological protection. The precipitation process is extremely complex and is influenced by the intersection of many variables, with significant randomness, uncertainty and non-linearity. Based on...
Article
Full-text available
Analyzing and evaluating the ecosystem service value of wetlands can provide technical support and theoretical basis for regional socio-economic development, ecological environmental protection, and other planning measures. Based on the factors of hydrology, meteorology, society, economy, resources, environment, and culture, the wetland ecosystem s...
Article
Full-text available
Scientific and accurate prediction of river runoff is important for river flood control and sustainable use of water resources. This study evaluates the ability of a Nonlinear Auto Regressive model (NAR) in predicting runoff volume. Using the Cuntan Hydrological Station in the upper reaches of the Yangtze River as the research object, the model was...
Article
Full-text available
The shape of bridge piers across rivers is one of the significant factors that affect the backwater in the river. The study on the influence of bridge pier shapes on the flow patterns of the river is valuable to the design of the bridge and river flooding. Based on the MIKE21 Flow Model hydrodynamic model, dynamic numerical simulations were conduct...
Article
Reasonable prediction of suspended sediment concentration is of great significance for river regulation and water conservancy project scheduling in upper and middle reaches. In order to solve the influence of nonlinear and non-stationary characteristics of sediment sequences on the prediction results and improve the prediction accuracy, a predictio...

Citations

... Especially the midlong term runoff forecasting, due to its large time span and multi-scale variability, it's more difficult to be predicted. The research on mid-long term runoff forecasting model has always been one of the difficulties and hot issues in the field of hydrology (Zhang et al. 2022b). ...
... e 3D GIS tool Engage3D has grid surface creation, grid display control, 3D analysis and query, terrain image browsing, realtime interactive navigation, 3D Walkthrough animation, and other functions. Cult3D is a web-based 3D software based on streaming 3D technology, which provides basic operations such as rotation, zoom in, and zoom out to view 3D models from different angles [11]. e city of Faro and New York have established a WebGIS urban tree management system to achieve tree loss assessment and postdisaster tree cleanup after a snowstorm [12]. ...
... To explore the feasibility of the HPF-GM(1,1)-coupled model (Shahid et al. 2018), relative error (RE) (Shahid et al. 2021), mean relative error (MAPE), root mean square error (RMSE), and Nash efficiency coefficient (NSE) were used as criteria for assessing the accuracy of the model (Esmaeili et al. 2021;Zhang et al. 2021). ...
... Since the 1990s, WSSs have become a hot topic of research in watershed management [17,18]. Previously, the assessment of ESs was mainly based on land use types and combined with factor analysis [19]. However, the results were from the lack of spatial concepts, single evaluation, and preliminary dynamic studies [20]. ...
... With global warming, climate change has attracted more and more attention from scholars around the world. In the 21st century, global precipitation and extreme precipitation are increasing; especially in mid-high latitudes of the northern hemisphere, the rainfall intensity and frequency have increased significantly (Singh et al. 2021;X. Zhang et al. 2021). Many scholars have invested in research on extreme climates (Tye et al. 2016;Wu & Qian 2017;John et al. 2020). To deal with different geographical locations, different temperature zones, the selected methods are also different (Chen et al. 2020;Zander et al. 2020). In the application of methods, many researchers (Sugiyama et al. 2010;M ...
... Currently, scholars at home and abroad have conducted a large number of related studies on the impact of cross-river bridges on river channels and achieved more fruitful results. (David et al. 2019) conducted a hydrological simulation assessment of long-term regional bridge scour risk based on physical climate change and applied it in the Lihay River basin; (Tewodros & Abdusselam 2019) used the MIKE21 FM model to assess the risk of bridge scour in the Ayama basin in Turkey modeled the effect of urbanization on flood risk in the Ayamama basin, Istanbul; (Costabile et al. 2015) comparatively analyzed the backwater effects of bridge and no-bridge scenarios based on 1D and 2D river flood models; (Dimitriadis et al. 2016) comparatively assessed the uncertainty in flood mapping based on 1D and quasi-2D hydraulic models; (Zhang et al. 2021) based on MIKE21FM model, simulated the effect of different shaped piers on the flow regime of the river; (Echeverribar et al. 2019) provided a robust two-dimensional model for simulating flood events, which has the ability to avoid instability and makes the model suitable for numerical correction of complex phenomenon simulations (Wang & Jing 2019) studied the effect of bridge piers on flood hazards in the Jialing River basin using the MIKE21 two-dimensional numerical model. (Liu et al. 2020) based on a two-dimensional hydrodynamic model with dynamic numerical simulation of the congestion and scour generated by the current bridge and the bridge to be reconstructed; (Yan et al. 2020) studied the pier front congestion and section average congestion characteristics of double piles under different diameter and flow velocity conditions based on the principle of momentum conservation and hydrodynamic model; (Yu & Zhu 2019) used the Reynolds time-averaged N-S equation and the standard k-ε turbulence model to investigate the local scour of a series of The local scour refinement of double-cylindrical piers was simulated using the Reynolds time-averaged N-S equation and standard k-ε turbulence model. ...
... However, the decomposition results produced by EEMD would be contaminated by some residual noises, particularly when the number of ensemble trials is relatively low [35]. The noise can be eliminated by increasing the number of ensemble trials, but the calculation time will also increase [36]. Torres et al. [37] proposed the Complete Ensemble Empirical Mode Decomposition with Adaptive Noise (CEEMDAN) algorithm to improve the performance of EEMD. ...