A new era of flood control strategies from the perspective of managing the 2020 Yangtze River flood

Abstract Hydropower is the second largest conventional energy resource in China. It is a renewable energy with mature technology, flexible operation, cleanliness and low carbon. A hydropower project has flood control, a water supply, navigation, irrigation and other comprehensive utilization functions. The new era in China is guided by the new energy-security strategy of ‘four revolutions and one cooperation’ and the new development concept of ‘innovation, coordination, green development, openness and sharing’. According to the dual nature of water and electricity, this paper deepens the basic understanding of hydropower from the experience of the world, the difficult problems of hydropower in China and the long-term development of hydropower enterprises. The future direction of hydropower development is explored from the following aspects: high-quality development of follow-up hydropower projects, innovative utilization of existing hydropower value, creative pursuit of hydropower-benefit growth and high-level promotion of hydropower international cooperation.

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Numerical Simulation Study of Booming Effect in Fast Currents of Inland River

E3S Web of Conferences ◽

10.1051/e3sconf/20183803048 ◽

2018 ◽

Vol 38 ◽

pp. 03048

Author(s):

Rongchang Chen ◽

Chen Liu ◽

Xiaofeng Luo ◽

Wei Shen

Keyword(s):

Numerical Simulation ◽

Environmental Conditions ◽

Yangtze River ◽

Flood Control ◽

Peak Flow ◽

Control Design ◽

Simulation Method ◽

Design Flow ◽

The Yangtze River ◽

Annual Average

In the downstream tidal section of the Yangtze River, nine kinds of combinations of hydrological environmental conditions are considered, including the annual average runoff flow, the annual average peak flow and the flood control design flow, as well as the three conditions of spring, medium and neap tides. By means of the numerical simulation method, the effective performance parameter values for conventional intercepting boom under different environmental conditions are obtained by simulating 9 kinds of maximum current speed to withstand, Max.CS, respectively. The results show that, in the downstream fast current tidal section of the Yangtze River, for the boom performance index of Max.CS, the relatively extensive applicability value should be 3.0kn under the condition of the annual average runoff flow; 4.0Kn should be selected under the condition of the annual average peak flow; and 4.5Kn should be selected under the flood control design flow. This study can provide technical support for the design, selection and use of booms in downstream waters of the Yangtze River.

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Research on Water Environment Regulation of Artificial Playground Lake Interconnected Yangtze River

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph15102110 ◽

2018 ◽

Vol 15 (10) ◽

pp. 2110 ◽

Cited By ~ 1

Author(s):

Weiwei Song ◽

Xingqian Fu ◽

Yong Pang ◽

Dahao Song ◽

Qing Xu ◽

...

Keyword(s):

Water Quality ◽

Water Level ◽

Yangtze River ◽

Flood Control ◽

Numerical Models ◽

Rapid Development ◽

Control Level ◽

Water Environment ◽

Water Diversion ◽

Coupled Models

With the rapid development of China, water pollution is still a serious problem despite implementation of control measures. Reasonable water environment management measures are very important for improving water quality and controlling eutrophication. In this study, the coupled models of hydrodynamics, water quality, and eutrophication were used to predict artificial Playground Lake water quality in the Zhenjiang, China. Recommended “unilateral” and “bilateral” river numerical models were constructed to simulate the water quality in the Playground Lake without or with water diversion by pump, sluice and push pump. Under “unilateral” and “bilateral” river layouts, total nitrogen and total phosphorus meet the landscape water requirement through water diversion. Tourist season in spring and summer and its suitable temperature result in heavier eutrophication, while winter is lighter. Under pumping condition, water quality and eutrophication of “unilateral” river is better than “bilateral” rivers. Under sluice diversion, the central landscape lake of “unilateral river” is not smooth, and water quality and eutrophication is inferior to the “bilateral”. When the water level exceeds the flood control level (4.1 m), priority 1 is launched to discharge water from the Playground Lake. During operation of playground, when water level is less than the minimum level (3.3 m), priority 2 is turned on for pumping diversion or sluice diversion to Playground Lake. After opening the Yangtze river diversion channel sluice, priority 3 is launched for sluice diversion to the Playground Lake. When the temperature is less than 15 °C, from 15 °C to 25 °C and higher than 25 °C, the water quality can be maintained for 15 days, 10 days and 7 days, respectively. Corresponding to the conditions of different priority levels, reasonable choices of scheduling measures under different conditions to improve the water quality and control eutrophication of the Playground Lake. This article is relevant for the environmental management of the artificial Playground Lake, and similar lakes elsewhere.

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