scholarly journals Fast and optimal decision for emergency control of sudden water pollution accidents in long distance water diversion projects

2020 ◽  
Vol 20 (4) ◽  
pp. 1356-1367
Author(s):  
Yu Qiao ◽  
Xiaohui Lei ◽  
Yan Long ◽  
Jiahong Li ◽  
Yilin Yang ◽  
...  
Keyword(s):  
Water Pollution ◽  
Peak Concentration ◽  
Water Diversion ◽  
Optimal Decision ◽  
Long Distance ◽  
Emergency Control ◽  
Fixed Weight ◽  
North Water ◽  
Relative Errors ◽  
Sudden Water Pollution

Abstract Long distance water diversion projects transfer clean water to cities for industrial, agricultural and domestic use; there is a great risk of sudden water pollution accidents. Without a fast and optimal decision for emergency control in response to sudden water pollution accidents, dispatchers or decision-makers will not be prepared to respond to the accidents during the process of an emergency spill. To address this gap, a framework for fast and optimal decision support in emergency control is reported in this paper. The proposed fast and optimal decision system covers four stages. In this study, the analytical hierarchy process integrated with grey fixed weight clustering was used to determine the gate closing mode. The emergency control strategy in ice cover formation period is presented. A case study was examined in the demonstrative project conducted in the Middle Route of the South-to-North Water Diversion Project in China. The relative errors of the arrival time of the peak concentration and the peak concentration in monitoring points between the actual monitoring values and the formula calculation values are less than 18%.

scholarly journals A real-time, rapid emergency control model for sudden water pollution accidents in long-distance water transfer projects

2016 ◽  
Vol 17 (1) ◽  
pp. 73-83 ◽  
Author(s):  
Guobin Xu ◽  
Yan Long ◽  
Chao Ma
Keyword(s):  
Water Pollution ◽  
Real Time ◽  
Peak Concentration ◽  
Water Transfer ◽  
Water Diversion ◽  
Long Distance ◽  
Emergency Control ◽  
Rapid Prediction ◽  
North Water ◽  
Sudden Water Pollution

A real-time, rapid emergency control (EC) model is proposed to cope with sudden water pollution accidents in long-distance water transfer projects. The EC model outputs the method of EC based on pollutant properties. A generalized form of EC model is proposed and tested with a demonstrative project. The rapid prediction formulas of emergency control parameters (ECPs) are proposed under different states of water diversion. The closing times of check gates and the pollution range are calculated by the rapid prediction formulas of ECPs. A case study is examined under the scenario of a sucrose spill in a demonstrative project conducted in the Fangshui to Puyang channel of the Beijing–Shijiazhuang Emergency Water Supply Project in the middle route of the South-to-North Water Transfer Project. The relative errors of peak concentration and arrival time of peak concentration are less than 20%. However, we could not use an actual toxic soluble pollutant to validate the EC model, so we performed the experiment with sucrose to test the EC model based on its concentration variation. The final result shows that the model is able to play a fundamental role in the decisions involved in the Emergency Environmental Decision Support System.

scholarly journals A Gateway to Rapid Prediction of Water Quality: A Case Study in China’s South-to-North Water Diversion Project

Water ◽  
2021 ◽  
Vol 13 (17) ◽  
pp. 2407
Author(s):  
Yuxuan Zhang ◽  
Ranhang Zhao ◽  
Haofang Wang ◽  
Tao Peng ◽  
Huaqing Zhao
Keyword(s):  
Water Pollution ◽  
Water Quality ◽  
Water Transfer ◽  
Water Diversion ◽  
Successful Operation ◽  
Long Distance ◽  
Rapid Prediction ◽  
Water Diversion Project ◽  
North Water ◽  
Sudden Water Pollution

Water quality assurance is the primary factor for the successful operation of water diversion projects across river basins. The rapid prediction of water pollution is the basis for timely and effective emergency control and disposal measures. In China, since the open channels intersect with numerous waterways and traffic arteries, water transfer projects are prone to sudden water pollution accidents. In this paper, the rapid prediction method was developed for sudden water pollution accidents that possibly occurred in the East Route of the South-to-North Water Diversion Project (ERP) in Shandong Province. With the empirical formula of the pollution transfer law, a rapid prediction model of water quality (WQRP) was established based on the simulation of the typical accidents in the main channel. Finally, four typical accidents were selected as application examples, and the prediction results were compared with the results from a computer numerical simulation to demonstrate the validity of the model. The results showed that the prediction results by the WQRP model meet the accuracy requirements. This method is of great significance for providing water transport security in the extreme conditions of long-distance water transfer projects.

Emergency Control Strategy for Unexpected Water Pollution Accidents in the Middle Route Open Channel of the South-to-North Water Diversion Project

2014 ◽  
Vol 1030-1032 ◽  
pp. 519-525
Author(s):  
Tong Lai Xue ◽  
Hui Ming Wu ◽  
Wei Hong Liao ◽  
Xiao Hui Lei ◽  
Hao Xu
Keyword(s):  
Water Pollution ◽  
Water Quality ◽  
Control Strategy ◽  
Control Strategies ◽  
Water Diversion ◽  
Level Fluctuation ◽  
The South ◽  
Emergency Control ◽  
Water Diversion Project ◽  
North Water

This paper takes a typical channel passage in the middle route of the South-to-North water diversion project as an example to study emergency control strategies for unexpected water pollution accidents. A one-dimensional Saint Venant equation and water quality numerical model is developed, considering limitations such as the migration velocity of pollutants, water level fluctuation, and variations in the channel. Emergency control strategies for each gate are proposed for unexpected water pollution accidents and gate closing rules are established. Parameters such as the channel water depletion rate, stabilization time, water level fluctuation, and water quality are simulated under different control strategies in order to ensure the safe operation of water transport and to decide on the control strategy for unexpected water pollution accidents. Such studies can provide reference information for the development of emergency strategies in the middle route of the South-to-North water diversion project.

scholarly journals Impact on operation of the Middle Route Project of South-to-North Water Diversion

2018 ◽  
Vol 246 ◽  
pp. 01040
Author(s):  
Hui Wan ◽  
Huiyong Huang ◽  
Sidong Zeng ◽  
Yibo Yan ◽  
Yongyan Wu ◽  
...  
Keyword(s):  
Water Resources ◽  
Water Level ◽  
Water Diversion ◽  
Safe Operation ◽  
Ecological Civilization ◽  
Long Distance ◽  
Emergency Rescue ◽  
North Water ◽  
Control Failure ◽  
The Impact

The inter-basin water transfer project is one of the most important means to solve the uneven distribution of water resources in time and space, rationally allocate water resources, and promote the construction of water ecological civilization. Research on the operation impact and channel hydraulic response is meaning for the safe operation of long-distance water conveyance canals. Taking the Middle Route Project (MRP) of South-to-North Water Diversion (SNWD) as example, this paper built the onedimensional steady and unsteady flow model and investigated the impact of roughness change, emergency rescue technology and equipment, and sluice control failure. Results showed that increased roughness decreased the water diversion efficiency of MRP to some degree. The emergency rescue technology and equipment occupied the channel section and declined flow capacity. The occurrence of sluice control failure relatively played an increasing impact on upstream water level and a decreasing impact downstream water level and flow discharge. The impact of the above scenarios on the scheduling operation can be reduced to a certain extent by regular cleaning and maintenance, development of rational water emergency rescue project, development of staff skill, etc. This research can provide support for safe operation and regulation of the MRP of SNWD.

scholarly journals Source identification of sudden contamination based on the parameter uncertainty analysis

2016 ◽  
Vol 18 (6) ◽  
pp. 919-927 ◽  
Author(s):  
Wei Guozhen ◽  
Chi Zhang ◽  
Yu Li ◽  
Liu Haixing ◽  
Huicheng Zhou
Keyword(s):  
Source Identification ◽  
Water Diversion ◽  
Model Parameters ◽  
Source Information ◽  
Long Distance ◽  
True Value ◽  
Water Diversion Project ◽  
North Water ◽  
Delayed Rejection ◽  
Parameter Uncertainty Analysis

It is important to identify the source information after a sudden water contamination incident occurs in a water supply system. The accuracy of the simulation model's parameters determines the accuracy of the source information. However, it is difficult to obtain the true value of these parameters by existing methods, so reduction of the errors caused by the uncertainty of these parameters is a crucial problem. A source identification framework which considers the uncertainty of the model's sensitive parameters and combines Bayesian inference and Markov Chain Monte Carlo (MCMC) algorithms simulation is established, and the South-to-North Water Diversion Project is taken as the case study in this paper. Compared with a framework which does not consider the uncertainty of the model's parameters, the proposed framework could solve the error caused by the wrong choice of model parameters and obtain more accurate results. In addition, the proposed framework based on traditional MCMC and that based on the Delayed Rejection and Adaptive Metropolis (DRAM-MCMC) are compared to prove that the DRAM-MCMC is more convergent and accurate. Lastly, the proposed framework based on DRAM-MCMC is proved to solve the problem with high practicality and generality in the studied long distance water diversion project.

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