IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 32nd Congress - Venice (2007) : THEME A: Engineering and Management of Fresh-water Systems : Influence of water resources development and utilization on eco-environment of the downstream of yel...
Influence of water resources development and utilization on eco-environment of the downstream of yellow river
Author : Zhou Zhenmin
The Yellow River is the second largest river in China, which flows through the draught and semi-draught regions and supplies the important water sources for industrial and agricultural production and life of the north China.[1] The multi- annual average precipitation in the whole basin amounts to 466mm. The total volume of water resources amounts to 728×108m3, in which multi-annual average natural water resources amounts to 580×108m3, ground water resources amounts to 453×108m3, with the overlapped calculation 305×108m3, Since 1949, due to fast development of regional industry and agriculture in the basin, the supply and requirement problems of water resources have become serious. According to the bulletin of water consumption in the Yellow River Basin, the total water diversion from Yellow River in 1998 was 497.12×108m3, in which surface water amounted to 370×108m3, which equals to the total number of Yellow River water supply approved by the national government and occupies 74.4% of the total water diversion. The ground water exploitation amounted to 127.12×108m3, which occupies 25.6% of the total water diversion. In 1998, agricultural water consumption amounted to 334.6 ×108m3, which occupies 90.4%, industrial water consumption amounted to 26.77×108m3, which occupies 7.2% , daily life water consumption in the cities amounted to 5.17×108m3, which occupies 1.4% of the total surface water diversion(370×108m3). In recent years, considering water use for sediment discharge and environment, the actual water diversion has reached nearly to the maximum water supply ability of the Yellow River. According to statistics from 1972 to 1997, there were 20 years in which the channel flow-cutting-off happened in the main course of the Yellow River, which means that flow-cutting-off happened in 4 out of 5 years. The longest period of flow-cutting-off happened in 1997. There were 13 times flow-cutting-off in the period from 7, January to 31, December, the total flow cutting-off amounted to 226 days. The frequent flow- cutting-off in the downstream of Yellow River not only greatly affected industrial and agricultural production and people’s life, but also reduced water use for the channel sediment transportation, in turn, accelerated the river channel sediment deposition and decreased flood discharge ability. The flood discharge over the channel beaches was reduced from 6000m3/s in 1980s to 3000 m3/s in 2005, which attracts great concern from both home and abroad.
File Size : 83,699 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 32nd Congress - Venice (2007)
Article : THEME A: Engineering and Management of Fresh-water Systems
Date Published : 01/07/2007
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