Journal of Geographical Sciences ›› 2018, Vol. 28 ›› Issue (12): 1975-1993.doi: 10.1007/s11442-018-1575-9
• Research Articles • Previous Articles Next Articles
Yunping YANG1,2(), Mingjin ZHANG2, Zhaohua SUN1, Jianqiao HAN3,*(
), Jianjun Wang2
Received:
2017-02-21
Accepted:
2017-03-31
Online:
2018-12-20
Published:
2018-12-27
Contact:
Jianqiao HAN
E-mail:yangsan520_521@163.com;hjq13@163.com
About author:
Author: Yang Yunping (1985-), PhD, specialized in estuary and coastal evolution and causes. E-mail:
Supported by:
Yunping YANG, Mingjin ZHANG, Zhaohua SUN, Jianqiao HAN, Jianjun Wang. The relationship between water level change and river channel geometry adjustment in the downstream of the Three Gorges Dam[J].Journal of Geographical Sciences, 2018, 28(12): 1975-1993.
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Table 1
Sediment source and hydrological data of the downstream of the TGD"
Hydrological station and reach | Content | Period | Source |
---|---|---|---|
Yichang, Zhicheng, Shashi, Jianli, Hankou, Datong | Water, sediment, flow, water level | 1955-2016 | Yangtze River Middle and Lower Reaches Hydrological Yearbook |
Songzikou, Taipingkou, Ouchikou, Chenglingji, Hukou, Huangzhuang | Water, sediment, flow | ||
Yichang-Hukou Reach | Amount of river sediment | 1987-2015 | |
Yichang-Hukou Reach | Water level stations | 1981-2014 | Changjiang Waterway Planning Design and Research Institute |
Yichang-Yangtze Estuary | Depth and width of the shipping channel | 2002 and 2015 |
Figure 6
Erosion and deposition changes in the channels of the Yichang-Hukou reaches (The flow rates corresponding to the low-water channel, typical channel, and flood plain channel in the figure are 5000 m3/s, 10,000 m3/s, and 30,000 m3/s, respectively, as measured at the Yichang Station.)"
Table 2
Erosion and deposition proportion changes in the Yichang-Hukou reaches"
Period of time | Reach | YZR | UJR | LJR | CHR | HHR |
---|---|---|---|---|---|---|
Extent (km) | 60.8 | 171.7 | 175.5 | 251.0 | 295.4 | |
1981 to 2002 | Low-water channel (%) | 102.0 | 100.6 | 9.2 | 17.5 | 69.6 |
Low beach (%) | -2.0 | -0.6 | -109.2 | -117.5 | -169.6 | |
High beach (%) | ||||||
October 2002 to October 2008 | Low-water channel (%) | 88.6 | 89.6 | 73.2 | 301.8 | 60.4 |
Low beach (%) | 1.7 | 2.2 | 11.6 | -30.7 | 48.3 | |
High beach (%) | 9.6 | 8.2 | 15.2 | -171.1 | -8.7 | |
October 2008 to November 2015 | Low-water channel (%) | 96.4 | 94.0 | 95.4 | 95.3 | 115.0 |
Low beach (%) | 4.8 | 3.1 | -0.4 | 5.8 | -11.4 | |
High beach (%) | -1.1 | 2.9 | 5.0 | -1.1 | -3.6 |
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