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Bulletin of Chinese Academy of Sciences (Chinese Version)

Keywords

source region of Yellow River; climate change; water resources; vegetation coverage; countermeasures

Document Type

Article

Abstract

The source region of Yellow River is the most important water source and in contributing more than 37% of the total streamflow of the whole Yellow River, which makes great significance for water resources security, food production, and the ecological environment in the lower reaches of the river. Clarifying the changes in climatic hydrology and vegetation coverage, especially grassland degradation in the source region of Yellow River is not only a prerequisite for a deep understanding of the hydrological cycle mechanism of this region, but also an accurate grasp of the water resources and ecological environment in the source region and in the middle and lower reaches. Moreover, it is the core issue of implementing the requirements of President Xi Jinping's "ecological protection and high-quality development in the Yellow River Basin". According to the meteorological datasets, the source region of Yellow River has experienced a significant warming and wetting process since 1951, and has declined in the 1990s, but the temperature and precipitation have increased at a faster rate since 2000, which has led to the melting of glacial and snow, the increased evapotranspiration, and shrinkage of frozen soil. However, due to the intensification of water loss in various processes and the impact of human activities, this humidification cannot be converted into effective water resources, and the observed and natural streamflow have shown decreasing trends. Moreover, the continuously degraded grassland has continuously reduced the regional water conservation capacity and the ecological environment has continued to deteriorate. Facing the severe water resources and ecological environment challenges of the source region of Yellow River, we recommend that (1) ecological environmental protection be given priority; (2) the orderly development and utilization of water resources; (3) the harmonious coexistence of social production and the natural environment; and (4) the implementation of an orderly adaptation to climate change as a strategic perspective.

First page

61

Last Page

72

Language

Chinese

Publisher

Bulletin of Chinese Academy of Sciences

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