Crucial time of emergency monitoring for reliable numerical pollution source identification.

Autor: Yang R; School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, PR China., Jiang J; School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, PR China; KWR Water Research Institute, Nieuwegein 3433PE, the Netherlands. Electronic address: jiangjp@sustech.edu.cn., Pang T; School of Environment, Harbin Institute of Technology, Harbin 150090, PR China., Yang Z; State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, PR China., Han F; School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, PR China., Li H; School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, PR China., Wang H; School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen 518055, PR China. Electronic address: whj1533@qq.com., Zheng Y; School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, PR China.
Jazyk: angličtina
Zdroj: Water research [Water Res] 2024 Nov 01; Vol. 265, pp. 122303. Date of Electronic Publication: 2024 Aug 22.
DOI: 10.1016/j.watres.2024.122303
Abstrakt: The Pollution source identification (PSI) is an important issue on river water quality management especially for urban receiving water. Numerical inversion method is theoretically an effective PSI technique, which employs monitored downstream pollutant breakthrough curves to identify the pollution source. In practice, it is important to know how much monitoring data should be accumulated to provide PSI results with acceptable accuracy and uncertainty. However, no literature reports on this key point and it seriously handers the numerical PSI technology to mature practical applications. To seek a monitoring guideline for PSI, we conducted extensively numerical experiments for single-point source instantaneous release taking Bayesian-MCMC method as the baseline inversion technique. The crucial time (T c ) phenomenon was found during the data accumulation process for Bayesian source inversion. After T c , estimated source parameters subsequent sustained low error levels and uncertainty convergence. Results shown the presence of T c impacted by the number and location of monitoring sections, while monitoring frequency and data error do not. Under different river hydrodynamic conditions, relative crucial time (Λ) is determined by the river's Peclet number, and minimum effective Λ was controlled by dispersion coefficient (D x ). Analytic spatial structure of Λ(U, D x ) was uncovered and this relationship successfully explained by the information entropy theory. Based on these findings, a novel design method of PSI emergency monitoring network for preparedness plan and a practical framework of PSI for emergency response were established. These findings fill the important knowledge gap in PSI applications and the guidelines provide valuable references for river water quality management.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: