Abstract:

The South-to-North Water Diversion Project is a strategic project to realize the South-North allocation of water resources， the East-West mutual aid， and the formation of a rational allocation pattern of water resources in China. It has been preliminarily determined that the first phase of the west route of South-to-North Water Diversion Project will divert 4 billion cubic meters water from the Yalong River in the upper reaches of the Yangtze River to Taohe River in the upper reaches of the Yellow River， and then to the main stream of the Yellow River after passing through Taohe River to Liujiaxia Reservoir. Based on the new water and soil pattern of Gansu section of the main Yellow River （i.e.， under the two main water transport routes of "string arc" of the Gansu section of the Yellow River）， this study focuses on how to make use of the new water resources. This study also analyzed the effects of the new water and soil pattern on the Gansu section of the main stream of the Yellow River， the Shiyang River Basin in the northwest inland region， the Alxa region of Inner Mongolia and the Ning-Mongolia irrigated areas. The study are beneficial to the sustainable and rational utilization of water resources in areas with scarce water resources， and can provide a reference for the implementation of strategic planning for ecological protection and high-quality development in the upper reaches of the Yellow River Basin.

Key words: the first phase of the Western Route of the South-to-North Water Diversion Project, water diversion, new water resources, new water and soil pattern