Journal of Geographical Sciences ›› 2014, Vol. 24 ›› Issue (4): 731-745.doi: 10.1007/s11442-014-1116-0
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Chaomin OU1(), Jingbao LI2, Yongqiang ZHOU3,4, Weiyan CHENG2, Yan YANG2, Zhonghua ZHAO2
Received:
2013-08-13
Accepted:
2013-09-12
Online:
2014-04-20
Published:
2014-04-20
About author:
Author: Ou Chaomin (1979-), PhD and Associate Professor, specialized in disaster and emergency management. E-mail:
Supported by:
Chaomin OU, Jingbao LI, Yongqiang ZHOU, Weiyan CHENG, Yan YANG, Zhonghua ZHAO. Evolution characters of water exchange abilities between Dongting Lake and Yangtze River[J].Journal of Geographical Sciences, 2014, 24(4): 731-745.
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Table 1
Comparison between the water volumes of Three Outlets and Chenglingji under similar water volume of Zhicheng Station before and after the operation of the TGR"
Year | Runoff of Zhicheng Station (108 m3) | Anomalies of the runoff (%) | Water volume of Three Outlets (108 m3) | Water volume of Chenglingji (108 m3) | Year | Runoff of Zhicheng Station (108 m3) | Anomalies of the runoff (%) | Water volume of Three Outlets (108 m3) | Water volume of Chenglingji (108 m3) |
---|---|---|---|---|---|---|---|---|---|
1976 | 4246.8 | +0.6 | 586.7 | 2861.1 | 2003 | 4229.7 | +1.8 | 576.2 | 2684.5 |
1995 | 4216.5 | -0.1 | 500.8 | 2321.2 | 2004 | 4217.5 | +1.5 | 532.7 | 2327.4 |
1951 | 4556.0 | +7.9 | 1480.0 | 3098.0 | 2005 | 4542.1 | +9.3 | 632.2 | 2415.2 |
1994 | 3432.6 | -18.7 | 344.9 | 2738.0 | 2006 | 2930.6 | -29.5 | 184.6 | 1989.6 |
1960 | 4192.1 | -0.7 | 634.2 | 2824.6 | 2007 | 4180.3 | +0.6 | 550.4 | 2093.5 |
1996 | 4263.7 | +1.0 | 763.2 | 2549.9 | 2008 | 4276.5 | +2.9 | 536.5 | 2253.6 |
1971 | 4045.5 | -4.2 | 819.3 | 2320.9 | 2009 | 4043.0 | -2.7 | 449.0 | 2020.0 |
1999 | 4823.9 | +14.3 | 808.8 | 2990.6 | 2010 | 4824.0 | +16.1 | 632.4 | 2765.0 |
Table 2
Quarterly average runoffs (108 m3) of the Donting Lake and exchange coefficients over years"
Season | Runoff of Three Outlets | Runoff of Four Rivers | Runoff of inflow into the Lake | Runoff of Chenglingji | Exchange coefficient (I) |
---|---|---|---|---|---|
Spring | 1.27 | 86.23 | 87.50 | 102.57 | 0.04 |
Summer | 50.80 | 250.63 | 301.43 | 316.87 | 0.48 |
Autumn | 195.63 | 146.00 | 341.63 | 392.00 | 1.66 |
Winter | 42.90 | 69.90 | 112.80 | 154.33 | 0.61 |
Table 3
Changes of the water exchange coefficient between Dongting Lake and Yangtze River in typical years in the past 60 years"
Dry years | Runoff of Zhicheng (108 m3) | The coefficient | Normal years | Runoff of Zhicheng (108 m3) | The coefficient | Wet years | Runoff of Zhicheng (108 m3) | The coefficient |
---|---|---|---|---|---|---|---|---|
1994 | 3432.6 | 0.391 | 1960 | 4192.1 | 0.983 | 1999 | 4823.9 | 0.839 |
2006 | 2930.6 | 0.288 | 2007 | 4180.3 | 0.815 | 2010 | 4824.0 | 0.631 |
Table 4
River-lake water exchange abilities under different dispatching modes of the TGR in typical years"
Dispatching modes of the TGR | Dry year | Runoff of Zhicheng (108 m3) | The coefficient | Normal year | Runoff of Zhicheng (108 m3) | The coefficient | Wet year | Runoff of Zhicheng (108 m3) | The coefficient |
---|---|---|---|---|---|---|---|---|---|
Pre-discharge dispatch | 1994 | 3432.6 | 0.561 | 1960 | 4192.1 | 1.251 | 1999 | 4823.9 | 0.818 |
2006 | 2930.6 | 0.434 | 2007 | 4180.3 | 0.906 | 2010 | 4824.0 | 0.512 | |
Flood-storage dispatch | 1994 | 3432.6 | 0.314 | 1960 | 4192.1 | 1.282 | 1999 | 4823.9 | 0.752 |
2006 | 2930.6 | 0.355 | 2007 | 4180.3 | 0.874 | 2010 | 4824.0 | 0.837 | |
Water-storage dispatch | 1994 | 3432.6 | 0.492 | 1960 | 4192.1 | 1.535 | 1999 | 4823.9 | 0.641 |
2006 | 2930.6 | 0.378 | 2007 | 4180.3 | 0.729 | 2010 | 4824.0 | 0.575 | |
Water-supplement dispatch | 1994 | 3432.6 | 0.484 | 1960 | 4192.1 | 1.195 | 1999 | 4823.9 | 0.124 |
2006 | 2930.6 | 0. 251 | 2007 | 4180.3 | 0.191 | 2010 | 4824.0 | 0.061 |
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