| Changjiang River sediment delivering into the sea in response to water storage of Sanxia Reservoir in 2003 |
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| 作者姓名： | CHU Zhongxin ZHAI Shikui CHEN Xiufa |
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| 作者单位： | CHU Zhongxin1*，ZHAI Shikui1，CHEN Xiufa21. College of Marine Geosciences，Ocean University of China，Qingdao 266003，China2. Development and Research center，China Geological Survey，Beijing 100083，ChinaReceived 30 September 2005; accepted 21 December 2005 |
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| 基金项目： | Acknowledgements This study was supported by the National Basic Research Program of China for land-sea interaction and its effect on the environment in the typical estuaries and offshore areas under contract No. 2002CB412400. |
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| 摘 要： | 1 IntroductionHuman activitieshavebeen stronglyaffecting theworld river sedimentsupply to the oceans since the19thor20thcentury(StanleyandW arne,1993;Fanos,1995;Sm ithandW inkley,1996;Stanley,1996;Yang,Shi,etal.,2004;Yang,Zhao,etal.,2002).Thesedi-m enttra…
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| 关 键 词： | 长江 三峡水库 水资源 沉积物 水补给 |
| 收稿时间： | 2005-09-30 |
| 修稿时间： | 2005-12-21 |
Changjiang River sediment delivering into the sea in response to water storage of Sanxia Reservoir in 2003 |
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| CHU Zhongxin,ZHAI Shikui,CHEN Xiufa.Changjiang River sediment delivering into the sea in response to water storage of Sanxia Reservoir in 2003[J].Acta Oceanologica Sinica,2006,25(2):71-79. |
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| Authors: | CHU Zhongxin ZHAI Shikui and CHEN Xiufa |
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| Institution: | 1.College of Marine Geosciences, Ocean University of China, Qingdao 266003, China2.Development and Research center, China Geological Survey, Beijing 100083, China |
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| Abstract: | The Sanxia Reservoir on the Changjiang River stored water from 1 to 10 June and from 25 October to 5 November in 2003, elevating the water level to 135 and 139 m above mean sea level at the dam, respectively. A monthly dataset of water discharge, suspended sediment concentration (SSC) and sediment load of the Changjiang River from 1953 to 2003 measured at the Datong Hydrological Gauging Station of the downstreammost Changjiang River was mainly used to examine the Changjiang River sediment delivering into the sea in 2003 in response to the Sanxia Reservoir water storages in the same year. The results show that (1) compared with those in 2002, 2001, and the multi-yearly (1953~2000) average, both annual SSC and sediment load at Datong in 2003 were markedly reduced, and they were even smaller than the multi-yearly (1953~2000) minimum, although the annual runoff in 2003 did not change largely; and (2) compared with those in the corresponding months in 2002, 2001 and the multi-monthly average from 1953 to 2000, monthly SSC and sediment load at Datong both in June and November of 2003 were also markedly reduced, and those in June 2003 were even smaller than the multi-monthly minimum from 1953 to 2000. These may indicate that sediment sedimentation in the Sanxia Reservoir resulting from the Sanxia Reservoir water storage should be the main cause of the decreased annual and monthly SSC and sediment load of the Changjiang River into the sea in 2003. Besides, it seems that the Sanxia Reservoir water storage in the early June (flood season) of 2003 had more impacts on the decreased monthly SSC into the sea than that in the late October and early November (approximately non-flood season) of 2003. |
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| Keywords: | Changjiang (Yangtze) River Sanxia Reservoir water storage sediment |
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