Journal of Geographical Sciences >
The hydrological effect between Jingjiang River and Dongting Lake during the initial period of Three Gorges Project operation
Received date: 2009-12-26
Revised date: 2010-03-19
Online published: 2010-10-15
Supported by
Construction Program of the Key Discipline in Hunan Province, No.2008001; The Construction Program of the Key Discipline in Hunan Normal University
Based on the measured hydrological data from 1951 to 2008, the chain hydrological effect between Jingjiang River and Dongting Lake is analyzed by comparative method after the Three Gorges Project operation. The result indicates that 1) the scouring amount in Jingjiang River made up 78.9% of the total from Yichang to Chenglingji, and its average scouring intensity was higher than the latter; 2) the water and sand diversion rates at the three outlets of the Jingjiang River were reduced by 2.33% and 2.78% separately; 3) the proportion of multi-year average runoff and sediment through the three outlets in the total into the Dongting Lake decreased by 7.7% and 24.4% respectively; 4) in Dongting Lake, the speed of sediment accumulation was lowered by 26.7%, in flood season, the runoff amount was 20.2% less than the multi-year average value, leading to seasonal scarcity of water year by year. The former prolonged the lake life, while the latter induced droughts in summer and fall in successive years, shortage of drinking and industrial water, shipping insecurity, as well as ecological problems such as decrease of birds and quick increase of Microtus fortis; 5) The multi-year average values of sediment and flood transporting capacity at the lake outlet were respectively increased by 26.6% and 3.7%, the embankments were protected effectively. Then, to adapt to the new change of the river-lake relation, some suggestions were put forward, such as optimizing further operation program of the Three Gorges Reservoir, reexamining the idea of river and lake regulation, and maintaining connection of the river and the lake.
CHANG Jiang, LI Jingbao, LU Dianqing, ZHU Xiang, LU Chengzhi, ZHOU Yueyun, DENG Chuxiong . The hydrological effect between Jingjiang River and Dongting Lake during the initial period of Three Gorges Project operation[J]. Journal of Geographical Sciences, 2010 , 20(5) : 771 -786 . DOI: 10.1007/s11442-010-0810-9
[1] Cai Qihua, 2007. Healthy Yangtze River and Dongting Lake regulation. Journal of Hydro & Power, 28(9): 1–4. (in Chinese)
[2] Changjiang Water Resources Commission, 1991. Research on optimizing operation of the Three Gorges Reservoir. (in Chinese)
[3] Changjiang Water Resources Commission, 2006. A Report on River-lake Relation and Flood Prevention Situation in the Middle and Lower Yangtze River. (in Chinese)
[4] Dai Shibao, Yang Shilun, Zhao Huayun et al., 2005. Response of middle and lower reaches of Yangtze River to the initial operation stage of theThree Gorges Project. Journal of Sediment Research, (5): 35–39. (in Chinese)
[5] Duan Wenzhong, 1993. The relation between cut-offs in lower Jingjiang River and water level at Chenglingji. Journal of Sediment Research, (1): 23–26. (in Chinese)
[6] Li Bo, Wang Yong, Zhang Meiwen et al., 2008. Some behavior of Microtus fortis calamorum during migration while population outbreak in Dongting Lake Area. Chinese Journal of Zoology, 43(2): 57–63. (in Chinese)
[7] Li Jingbao, Liu Xiaoqing, Pan Anmin, 1995. The main rivers along the southern bank of the jingjiang and impact on the lake. Tropical Geography, 15(4): 313–320. (in Chinese)
[8] Li Jingbao, Qin Jianxin, Wang Kelin et al., 2004. The resoponse of environment system changes of Dongting Lake to hydrological situation. Acta Geographica Sinica, 59(2): 239–248. (in Chinese)
[9] Li Jingbao, Wang Kelin, Yin Hui et al., 2008. The characteristics and causes of agricultural drought disasters in the area of Dongting Lake from 2000 to 2007. Journal of Water Resources and Water Engineering, 19(6): 1–5. (in Chinese)
[10] Li Jingbao, Zhou Heping, Zhou Liang et al., 2008. Effects by silt process on Microtus fortis calamorum trends and complex calamities of Dongting Lake. Journal of Natural Disasters, 17(4): 99–104. (in Chinese)
[11] Li Tianyi, Deng Jinyun, Sun Zhaohua, 2000. Sediment deposition and variation of flood storage capacity in Dongting Lake. Journal of Hydraulic Enginneering, 12: 48–52. (in Chinese)
[12] Liu Kabo, 2008. Water construction adjusting and water resources allocation optimization. Hunan Hydro & Power, (4): 33–36. (in Chinese)
[13] Lu Jinyou, Luo Hengkai, 1999. Preliminary analysis on variation of the relation between Yangtze River and Dongting Lake. Yangtze River, 30(4): 24–26. (in Chinese)
[14] Lu Jinyou, Luo Minxun, 1997. The change in the water level of the section from Yichang to Chenglingli in the middle reaches of Yangtze River. Yangtze River, 28(5): 25–27. (in Chinese)
[15] Nanjing Hydro and Water Resources Institute, Ministry of Water Resources, 1991. A Report on River-lake Relation in the Middle Yangtze River. (in Chinese)
[16] Ning Lei, Zhong Zhiyu, 2004. Influence of TGP Reservoir filling in 2003 on the water regine of middle and lower reach of Yangtze River. Yangtze River, 35(12): 24–26. (in Chinese)
[17] Peng Yuming, Duan Wenduan, Chen Jiahua, 2007. Change of the three outlets in Jingjiang River and the regulation scheme. Journal of Sediment Research, 6: 59–63. (in Chinese)
[18] Tang Richang, 1999. Impact of river bend cut-off of lower Jingjiang River on the river and Dongting Lake. Yangtze River, 30(4): 20–23. (in Chinese)
[19] Wang Xiaozhong, 2006. The speech at the Meeting of Hydrological Construction in Dongting Lake On-the-spot. (in Chinese)
[20] Xie Yunhui, 2007. Protecting the Dongting Lake with no delay. Nature, 5: 62–66. (in Chinese) Zhong Zhiyu, 2007. Several considerations on comprehensive plan of the Dongting Lake area. Yangtze River, 38(1): 1–2. (in Chinese)
[21] Zhong Zhiyu, Hu Weizhong, 2008. On relation of river and lake. Yangtze River, 39(1): 20–23. (in Chinese)
/
| 〈 |
|
〉 |