Response of Erosion and Deposition in Ningxia-Inner Mongolia Reach to the Application of Long-Liu Reservoiron the Upper Yellow River

Autor: Qing Feng, Xiaohua Zhang, Qianlu Xiao, Yanshuang Zheng
Rok vydání: 2019
Předmět:
Zdroj: IOP Conference Series: Earth and Environmental Science. 384:012223
ISSN: 1755-1315
1755-1307
DOI: 10.1088/1755-1315/384/1/012223
Popis: Along with the global and regional climate change and the intensification of human activities, the run-off of the Yellow River basin has been reduced remarkably, bringing serious problems to the local economy and river ecology. In order to point out important scientific issues of human activities, especially the operation of large- sized reservoirs to the changes of scour and fill of Ningxia-Inner Mongolia reach and the basin management, the paper mainly analyzed the influence of human activities (Longyangxia and Liujiaxia reservoirs are called Long-Liu reservoirs for short) to the scour and fill of Ningxia-Inner Mongolia reach. It used the method of hydrologic and hydrodynamic computation model of Ningxia-Inner Mongolia reach, took the observed silt-discharge data of 1968~2004 to prepare a calculation plan of with or without the joint operation of Long-Liu reservoirs and quantitatively evaluate the influence of the operation of Long-Liu reservoirs to the channel scour and fill amount of Ningxia-Inner Mongolia reach. The outcomes show that the joint operation of Long-Liu reservoirs has increased the sedimentation of the reach. During the joint operation of the period of 1987~2004, comparing with the conditions of with and without Long-Liu reservoirs, the total sedimentation of the reach has increased 170 million tons, of which, 363 million tons increased in flood season and 193 million tons decreased in non-flood season. The research results can provide technical reference to the harnessing of Ningxia-Inner Mongolia reach of the upper Yellow River and have an important role in the Yellow River basin management.
Databáze: OpenAIRE
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