Yangtze River, the longest river in Asia, provides 40 percent of freshwater in China and plays an important role in ecological biodiversity. However, this ecosystem has been deteriorated by the continuously construction of reservoirs and hydropower stations. Many investigations have been carried for the biodiversity, hydrological indicators, and species distribution along Yangtze River caused by dam construction. As a result, the ecological operation has been gradually applied to mitigate the negative effects of water conservancy projects. In order to well know recent advances in the study of fish habitat in the Yangtze River Basin, 424 original papers published from 2000 to 2020 using bibliometrics were compiled in this research to analyze the developing trends including topics, data, and research status. The results of literature statistics showed that the related research fields on the effects of the reservoir on hydrological indicators mainly focused on negative impact caused by hydrological changes, water temperature effect, and sediment variation. In the studies on the habitats of fish, the four major Chinese carps and Chinese sturgeon were the main objects of concern, in which multi-objective joint operation, cascade reservoir operation, and model coupling have been widely adapted.
The Yarlung Zangbo River is not only the longest plateau river in China, but also one of the highest rivers in the world. This paper studies ecology, geology, investment and benefits respectively. Based on the data of the elevation, drop and fish abundance of the Yarlung Zangbo River, combined with its geographical location, a multi-objective optimization model is established. To analyzes the number of hydropower stations built on the Yarlung Zangbo River from the perspective of maximum energy utilization, this paper use the dynamic programming method to find the maximum output energy of each hydropower station. The conclusion is that the total output of 16 hydropower stations is 51358600KW, which reaches a high level. It is estimated that the potential power generation capacity of the Yarlung Zangbo River is about 55 million KW.
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