Articles
Research on Flood Risk Control Methods and Reservoir Flood Control Operation Oriented towards Floodwater Utilization
1. Introduction
Floods are signifcant natural disasters that result in casualties and property damage [1]. Reservoirs are crucial for flood control and floodwater utilization and lead to conflicts between the two [2]. With growing populations and socio-economic development, water shortages in some regions are becoming more acute [3]. Therefore, enhancing floodwater utilization becomes necessary [4]. The flood limit water level (FLWL) balances flood control and floodwater utilization [5]. In China, reservoirs typically stay below the FLWL during the wet season [6]. However, the conventional FLWL is designed to overemphasize low-probability floods, leading to the insuffcient utilization of floodwater [7]. Realizing the
dynamic control of the flood limit water level (DC-FLWL) is an available way to improve floodwater utilization; this involves controlling water levels in safe regions for trade-off benefts between flood risk and floodwater utilization [8].
The relationship between risks and benefts is characterized by mutual antagonism, and enhancing the advantages will inevitably entail certain potential hazards. Realizing the dynamic control of the FLWL enhances floodwater utilization, yet it also introduces uncertainties to a certain extent, potentially giving rise to additional flood-related risks [9]. Therefore, research on the DC-FLWL and the generated risks associated with this approach has become popular in recent years. Tan et al. [10] studied the DC-FLWL taking into account the spatial uncertainty of floods. Zhou et al. [11] realized the DC-FLWL with the aim of improving water resource utilization using a multi-objective optimization algorithm
and an aggregation decomposition method. Zhang et al. [12] discussed and improved the DC-FLWL on the basis of forecast information. Gong et al. [13] conceptualized river flood routing as a hypothetical reservoir based on the Muskingum model and analyzed its impact on dynamic control boundaries. Ning et al. [14] assessed flood risk by considering flood forecast uncertainty and analyzed the impacts at different FLWLs. Mu et al. [15] established the dynamic water level to optimize water resource utilization and estimated the flood risk resulting from flood forecast errors. Pan et al. [16] identifed dynamic control areas using the pre-discharge method and built a risk analysis model. Lu et al. [17] integrated a flood risk analysis model with various risk sources and studied their impacts on flood risk. Du et al. [18] discovered both the risks and benefts of floodwater utilization increases in the wake of increasing the FLWL, albeit at different rates.
The theories and methods for realizing the dynamic control of FLWL and flood risk control are being continuously enhanced. Nevertheless, there are still unresolved issues that warrant further investigation in the feld of the DC-FLWL and its associated risks:
(1) The existing research on the DC-FLWL mainly focuses on studying the dynamic control boundaries and does not consider the variability of the dynamic control boundaries under different acceptable flood risks.
(2) Previous studies have primarily concentrated on floodwater utilization while paying limited attention to reservoir operation and risk control
in the context of the DC-FLWL. The DC-FLWL is crucial to improving floodwater utilization and ensuring an acceptable flood risk, which is also an urgent problem in the current research on the flood risk control method. This paper identifed key risk factors and proposed a flood risk control method oriented towards floodwater utilization. The proposed method achieved the dynamic control boundaries of the FLWL under various acceptable risks and provided a supportive role for the DC-FLWL.
Research on Flood Risk Control Methods and Reservoir Flood Control Operation Oriented towards Floodwater Utilization
Floods are signifcant natural disasters that result in casualties and property damage [1]. Reservoirs are crucial for flood control and floodwater utilization and lead to conflicts between the two [2]. With growing populations and socio-economic development, water shortages in some regions are becoming more acute [3]. Therefore, enhancing floodwater utilization becomes necessary [4]. The flood limit water level (FLWL) balances flood control and floodwater utilization [5]. In China, reservoirs typically stay below the FLWL during the wet season [6]. However, the conventional FLWL is designed to overemphasize low-probability floods, leading to the insuffcient utilization of floodwater [7]. Realizing the
dynamic control of the flood limit water level (DC-FLWL) is an available way to improve floodwater utilization; this involves controlling water levels in safe regions for trade-off benefts between flood risk and floodwater utilization [8].
The relationship between risks and benefts is characterized by mutual antagonism, and enhancing the advantages will inevitably entail certain potential hazards. Realizing the dynamic control of the FLWL enhances floodwater utilization, yet it also introduces uncertainties to a certain extent, potentially giving rise to additional flood-related risks [9]. Therefore, research on the DC-FLWL and the generated risks associated with this approach has become popular in recent years. Tan et al. [10] studied the DC-FLWL taking into account the spatial uncertainty of floods. Zhou et al. [11] realized the DC-FLWL with the aim of improving water resource utilization using a multi-objective optimization algorithm
and an aggregation decomposition method. Zhang et al. [12] discussed and improved the DC-FLWL on the basis of forecast information. Gong et al. [13] conceptualized river flood routing as a hypothetical reservoir based on the Muskingum model and analyzed its impact on dynamic control boundaries. Ning et al. [14] assessed flood risk by considering flood forecast uncertainty and analyzed the impacts at different FLWLs. Mu et al. [15] established the dynamic water level to optimize water resource utilization and estimated the flood risk resulting from flood forecast errors. Pan et al. [16] identifed dynamic control areas using the pre-discharge method and built a risk analysis model. Lu et al. [17] integrated a flood risk analysis model with various risk sources and studied their impacts on flood risk. Du et al. [18] discovered both the risks and benefts of floodwater utilization increases in the wake of increasing the FLWL, albeit at different rates.
The theories and methods for realizing the dynamic control of FLWL and flood risk control are being continuously enhanced. Nevertheless, there are still unresolved issues that warrant further investigation in the feld of the DC-FLWL and its associated risks:
(1) The existing research on the DC-FLWL mainly focuses on studying the dynamic control boundaries and does not consider the variability of the dynamic control boundaries under different acceptable flood risks.
(2) Previous studies have primarily concentrated on floodwater utilization while paying limited attention to reservoir operation and risk control
in the context of the DC-FLWL. The DC-FLWL is crucial to improving floodwater utilization and ensuring an acceptable flood risk, which is also an urgent problem in the current research on the flood risk control method. This paper identifed key risk factors and proposed a flood risk control method oriented towards floodwater utilization. The proposed method achieved the dynamic control boundaries of the FLWL under various acceptable risks and provided a supportive role for the DC-FLWL.
Research on Flood Risk Control Methods and Reservoir Flood Control Operation Oriented towards Floodwater Utilization
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WaterTuesday, December 30, 2025