Research on the Optimal Regulation of Sudden Water Pollution

Abstract

For the needs of the whole region’s emergency regulation of the nullah sudden water pollution event, the emergency regulation strategy of the accident section and upstream and downstream of the sudden water pollution event is studied. For the accident section, the duration of the whole emergency event is calculated using the parameter quantification method; for the upstream of the accident section, the NSGA-II is used to adjust the gate opening to ensure the water level stability of the upstream pools; for the downstream section, the optimized partition method is used to identify the unfavorable pools and close the unfavorable pool to extend the water supply time. Based on the example of an emergency event in the section of the Liyanghe gate–Guyunhe gate of the middle line project, the research results are as follows: the accident section is identified as the Xiaohe gate–Hutuohe gate, the upstream of the accident section is the Liyanghe gate–Xiaohe gate, and the downstream of the accident section is the Hutuohe gate–Gangtou Tunnel gate. The duration of the emergency event in the accident section is 7.9 h; the maximum average water level deviation before the gate upstream of the accident section is 0.05 m; two unfavorable canal pools are identified in the stream of the accident section, and the water supply time of the unfavorable pools is extended by 6.13 and 5.61 d.

A management framework for sudden water pollution: A systematic review output

“…All three studies demonstrated that appropriate reservoir operation techniques reduced water supply loss during an SWP event. Nevertheless, the latter (Ren et al, 2023) acknowledged the limitation of the method due to insufficient universality in its applicability. Likewise, Vanda et al (2021) proved that emergency reservoir operation was often associated with complications due to the complicated goals and priorities that affected the decision‐making process.…”

“…Several benefits were observed from using reservoir operation or dispatch include avoiding pollution spread (Chen et al, 2021) and delaying of pollutant arrival time (Yu et al, 2018). It also helps in the dilution of pollutant concentration (Bing et al, 2021; Fang et al, 2018; Zhai et al, 2020) and prolonging of drinking water safety (Ding et al, 2019; Xiao et al, 2018), and supply (Liu et al, 2018; Ren et al, 2023).…”

“…Another study by Shi et al (2017) recommended an emergency reservoir operation as an effective way to address the SWP in a water supply reservoir. Two studies by Zhai et al (2020) and Ren et al (2023) also simulated the effectiveness of reservoir dispatch during an SWP occurrence. All three studies demonstrated that appropriate reservoir operation techniques reduced water supply loss during an SWP event.…”