Influence of Daily Regulation of a Reservoir on Downstream Navigation

Shang, Yizi; Li, Xiaofei; Gao, Xuerui; Guo, Yanxiang; Ye, Yuntao; Shang, Ling

doi:10.1061/(asce)he.1943-5584.0001522

Cited by 15 publications

(9 citation statements)

References 11 publications

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“…Step 1: Establish the hydrodynamic model Two two-dimensional hydrodynamic models (upstream and downstream river reaches) are established according to Section 2.1. The flow profile in the unsteady flow condition is used as the upstream boundary, and the water level profile is used as the downstream boundary in both models [17]. Based on the results of the numerical simulation, the value of Dd and the cross-sectional water level corresponding to different operation conditions are calculated.…”

Section: Methodsmentioning

confidence: 99%

“…During the daily operation of the reservoir, scheduling schemes are developed to take into account power generation needs [14], peak load regulation [15], and storage water demands etc., which will result in daily cyclical changes in the discharge volume and water level [16]. The fluctuation is transmitted downstream, causing a complex unsteady flow [17]. Moreover, due to the special topography of some rivers, the large discharge volume of the reservoir can cause a large surface velocity and reflux in the local area of the river reaches [18].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Short-Term Multi-Objective Optimal Operation of Reservoirs to Maximize the Benefits of Hydropower and Navigation

Jia

Hui

Dong

et al. 2019

Water

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Traditional reservoir operation mainly focuses on economic benefits, while ignoring the impacts on navigation. Thus, the economic operation of reservoirs considering navigational demands is of great significance for improving benefits. A navigation capacity evaluation method (NCEM), which evaluates the navigation capacity considering the influence of flow velocity and water level variation on navigation, is proposed to more effectively evaluate the navigation capacity. Based on two-dimensional hydrodynamic numerical simulation, the NCEM accurately calculates the navigation capacity according to detailed flow velocity and water level changes. In addition, a short-term multi-objective optimal operation model considering the upstream and downstream navigation and power generation is established. Then, the Strength Pareto Evolutionary Algorithm (SPEA2) is used to solve the model. To verify the rationality of the method and model, they are applied to the case study of the Xiangjiaba reservoir. The results demonstrate that the method and model can not only provide a series of operation schemes for decision makers of reservoirs, but also direct the ship to pass safely through the approach channel, implying a certain practical value and significance as a reference for the short-term optimal operation of reservoirs in the future.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Short-Term Multi-Objective Optimal Operation of Reservoirs to Maximize the Benefits of Hydropower and Navigation

Jia

Hui

Dong

et al. 2019

Water

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“…The finite difference scheme in de Saint-Venant system of equations, the scheme applied mostly is the four-point implicit scheme raised by Preissmann, also called a space-time eccentricity scheme ( Figure 1) [9]. The de Saint-Venant system of equations is dispersed by using this method in this book.…”

Section: Equation Discretizationmentioning

confidence: 99%

“…Then, according to Formulas (9), (10) and (11), the de Saint-Venant system of equations can be dispersed into the following form:…”

Section: Equation Discretizationmentioning

confidence: 99%

Simulation Technology for Hydrodynamic and Water Quality in the Main Canal

Tian¹,

Zheng²,

Lei³

et al. 2018

Emergency Operation Technologies for Sudden Water Pollution Accidents in the Middle Route of South-to-North Water Diversion Pro

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The hydrodynamic and water quality simulation technology can be used for predicting the pollutant diffusion process after a sudden water pollution accident, and for analyzing the effect of emergency operation measures. The MRP features a long route, a variety of buildings, etc.; therefore, a set of hydrodynamic and water quality models that are applicable to the main canal of the MRP was independently developed based on 1-D open canal hydrodynamic and water quality theory and with various types of buildings as inner boundaries. Through calibration and verification, these models can be applied to the simulation of hydraulic and water quality response process under any operation conditions in the main canal of the MRP.

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“…Nevertheless, it is not economical or convenient to conduct physical model tests for research on navigation conditions, and therefore more details from model tests may not be captured. Hence, Shang et al [28] established a one-dimensional (1D) hydrodynamic model to simulate the influence of the daily regulation of the Xiaonanhai hydropower station on downstream navigation, and then proposed a practical method for evaluating the navigability of the small and midsize hydropower stations; some additional studies [29] have asserted that it would be better to deliberate throughout the dry season during the daily regulation of a hydropower station. Furthermore, Jia et al [30] proposed a navigability evaluation method for an approach channel by considering the variation of flow velocity and water level, based on a two-dimensional (2D) mathematical model.…”

Section: Introductionmentioning

confidence: 99%

Influence of Unsteady Flow Induced by a Large-Scale Hydropower Station on the Water Level Fluctuation of Multi-Approach Channels: A Case Study of the Three Gorges Project, China

Wan

Wang

et al. 2020

Water

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Unsteady flow induced by hydropower stations exerts a significant impact on the water level in multi-approach channels, which directly threatens the safe passage of ships. In this study, a one-dimensional and a two-dimensional hydrodynamic model are adopted to simulate the water level fluctuations at the entrance of multi-approach channels and the lower lock head of a ship lift with consideration of initial water surface elevation, base flow, flow amplitude, regulation time, and locations of hydropower stations, unfavorable conditions are successfully identified; and the fluctuations at the approach channel entrance and the lower lock head of a ship lift under single-peak and double-peak regulating mode are analyzed considering the flow regulating of the Gezhouba Hydropower Station (GHS), thus, the water level oscillation process in the multi-approach channels is presented. Results show that the largest wave amplitude in the multi-approach channels manifests under unfavorable conditions including lower initial water surface elevation, smaller base flow, larger flow variation, and shorter regulation time; and water level fluctuation in the multi-approach channel is primarily induced by flow amplitude and net flow between the Three Gorges Hydropower Station (TGHS) and the GHS, with consideration of the counter-regulation process of the GHS. This research contributes to providing a reference for a similar large-scale cascade hydropower station regarding regulation and control of navigation conditions.

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Influence of Daily Regulation of a Reservoir on Downstream Navigation

Cited by 15 publications

References 11 publications

Short-Term Multi-Objective Optimal Operation of Reservoirs to Maximize the Benefits of Hydropower and Navigation

Short-Term Multi-Objective Optimal Operation of Reservoirs to Maximize the Benefits of Hydropower and Navigation

Simulation Technology for Hydrodynamic and Water Quality in the Main Canal

Influence of Unsteady Flow Induced by a Large-Scale Hydropower Station on the Water Level Fluctuation of Multi-Approach Channels: A Case Study of the Three Gorges Project, China

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