An ecologically dispatch strategy using environmental flows for a cascade multi-sluice system: A case study of the Yongjiang River Basin, China

Weng, Xi; Jiang, Cuiling; Yuan, Menglin; Zhang, Manxue; Zeng, Tianshan; Jin, Chun

doi:10.1016/j.ecolind.2020.107053

Cited by 11 publications

(2 citation statements)

References 32 publications

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“…where η is the overall efficiency of the hydroelectric system, which is corelated to the flow rate of water; ρ is the density of water; g is the acceleration due to gravity; H is the net head, which is the difference in elevation between the water source (intake) and the turbine outlet (in meters). It is noteworthy that hydropower production is also related to the interbasin scheduling of cascaded hydropower plants [39] and ecological flow [40], which may have negative effects on hydropower and needs further investigation. By setting the relevant parameter m ij , the power output of random power sources can be adjusted to simulate the influence of extreme weather.…”

Section: Probabilistic Production Simulation Methods 41 the Randomnes...mentioning

confidence: 99%

A Long-Term Power Supply Risk Evaluation Method for China Regional Power System Based on Probabilistic Production Simulation

Hu,

Wang,

Cheng

et al. 2024

Energies

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To qualify the risk of extreme weather events for power supply security during the long-term power system transformation process, this paper proposes a risk probability evaluation method based on probabilistic production simulation. Firstly, the internal relationship of extreme weather intensity and duration is depicted using the copula function, and the influences of extreme weather on power security are described using the guaranteed power output ability coefficient, which can provide the extreme scenario basis for probabilistic production simulation. Then, a probabilistic production simulation method is proposed, which includes a typical-year scenario and extreme weather events. Meanwhile, an index system is proposed to qualify the power security level, which applies the loss of load expectation (LOLE) and time of loss of load expectation (TOLE) under different scenarios and other indices to reveal the long-term power security trend. Finally, the long-term power supply risks for the Yunnan provincial power system are analyzed using the proposed method, validating that the proposed method is capable of characterizing the influences of extreme weather on power security. The security level of different long-term power transformation schemes is evaluated.

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Section: Probabilistic Production Simulation Methods 41 the Randomnes...mentioning

confidence: 99%

A Long-Term Power Supply Risk Evaluation Method for China Regional Power System Based on Probabilistic Production Simulation

Hu,

Wang,

Cheng

et al. 2024

Energies

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“…Herein, the hydrodynamic and water quality modeling were conducted using the MIKE 3 model. This is a finite element model widely used in fluvial and lake modeling studies, which contains several modules, including the hydrodynamic model (HD), advection diffusion model (AD), ecological model (ECO Lab), and sand transport model (Weng et al 2020, Weng et al 2021. The HD module simulates changes in water level and flow resulting from different forces, providing a computational foundation for environmental hydrology.…”

Section: Model Introductionmentioning

confidence: 99%

Assessment of a new nutrient management strategy to control harmful cyanobacterial blooms in Lake Taihu using a hydrodynamic-ecological model

Weng,

Jiang,

Yuan

et al. 2023

Environ. Res. Commun.

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The external nutrient loading significantly affects large shallow lakes, particularly those with intricate rive networks. In Lake Taihu, pollutant discharge standards have traditionally been quantified based on water environmental capacity, while neglecting the response characteristics of algal growth in different regions to boundary inputs. For that analysis, this study first estimated the river pollutant loadings of 16 most significant inflow and outflow rivers of Lake Taihu from 2008 to 2020 and explored the correlations between inflow water quality parameters and lacustrine chlorophyll-a levels. Results highlighted the significant influence of high river input of permanganate values in spring on the chlorophyll-a levels in the lake. Based on this, this study proposed the hypothesis that reducing the inflow concentration of permanganate in spring would inhibit algal growth, which was further validated using coupled hydrodynamic and ecological models. The simulation results indicated that the reduction of permanganate inflow concentration during spring would significantly decrease chlorophyll-a concentration in spring and summer, especially leading to a notable impact on peak values. However, due to variations in background concentrations among rivers, the extent of reduction in lake chlorophyll-a levels showed significant spatial differences. Additionally, analysis of extracted algal bloom areas revealed that there still remained a relatively high risk of algal blooms occurring in the main regions, particularly during autumn when inflow pollutant concentrations increased rapidly. These findings emphasized the importance of formulating reasonable exogenous reduction schemes, which should consider the concentration and variation trend of inflow pollutants, as well as the response characteristics of algal bloom growth in different lake zones to the boundary.

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Estuarine environmental flow assessment based on the flow-ecological health index relation model: a case study in Yangtze River Estuary, China

Huang,

Wei,

Yang

et al. 2024

Environ Monit Assess

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An ecologically dispatch strategy using environmental flows for a cascade multi-sluice system: A case study of the Yongjiang River Basin, China

Cited by 11 publications

References 32 publications

A Long-Term Power Supply Risk Evaluation Method for China Regional Power System Based on Probabilistic Production Simulation

A Long-Term Power Supply Risk Evaluation Method for China Regional Power System Based on Probabilistic Production Simulation

Assessment of a new nutrient management strategy to control harmful cyanobacterial blooms in Lake Taihu using a hydrodynamic-ecological model

Estuarine environmental flow assessment based on the flow-ecological health index relation model: a case study in Yangtze River Estuary, China

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