scholarly journals Hydrological Drought in Dongting Lake Area (China) after the Running of Three Gorges Dam and a Possible Solution

Water ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2713
Author(s):  
Yizhuang Liu ◽  
Shu-Qing Yang ◽  
Changbo Jiang ◽  
Yuannan Long ◽  
Bin Deng ◽  
...  
Keyword(s):  
Flood Control ◽  
Water Storage ◽  
Water Shortage ◽  
Dongting Lake ◽  
Hydrological Drought ◽  
Three Gorges Dam ◽  
Lake Area ◽  
Three Gorges ◽  
Control Scheme ◽  
South Dongting Lake

Dongting Lake is located at the downstream of Three Gorges Dam (TGD) and the hydrological drought is intensified after the impoundment of TGD as the dry period has been extended from 123 days/year before the operation of TGD (1981–2002) to 141 days/year (2003–2016) on average. Particularly, the Dongting Lake’s water shortage becomes very severe. To solve the problem caused by upstream dams, an innovative flood control scheme (IFCS) was introduced, and its feasibility of application in Dongting Lake is studied using the hydrodynamic module of Mike 21. The results show the IFCS can effectively convert the peak discharge of floodwater in wet seasons into water resources in dry seasons as the IFCS could significantly increase the usable water storage of the lake. For example, the usable water storage could increase to 2.85 billion m3 and 1.81 billion m3 in the extreme drought year of 2006 and 2011, respectively. The average increment of the water level would be about 0.4 m, 0.6 m, and 0.5 m in the West Dongting Lake (WDL), South Dongting Lake (SDL), and the East Dongting Lake (EDL), respectively, if the water stored in the inner lake was discharged uniformly in 30 days (27 November to 27 December 2006) with the application of IFCS. This study may provide an innovative method to alleviate the water shortage problem in Dongting Lake and other similar lakes.

Impact of the Three Gorges Reservoir Flood Prevention Dispatching Tohydrologic Information and Disaster Information in Dongting Lake Area

2012 ◽  
Vol 518-523 ◽  
pp. 3652-3661
Author(s):  
Jing Bao Li ◽  
Ying Chao Guo ◽  
Zhong Hua Zhao ◽  
Hong Shuai ◽  
Lei Xie
Keyword(s):  
Three Gorges Reservoir ◽  
Flood Control ◽  
Dongting Lake ◽  
Lake Area ◽  
Three Gorges ◽  
Flood Prevention ◽  
The Three Gorges Reservoir ◽  
Dongting Lake Area ◽  
The Three Gorges ◽  
Disaster Information

Use the flood years (1998、2010) the data of the hydrologic information and disaster information, comparative analysis the impact on hydrologic information and disaster information in Dongting Lake area of the Three Gorges Reservoir flood prevention dispatching .The results show that: the inflow of lake into Jingjiang Sankou reduces about 242.61 × 108 m3,the flood level of Hukou Chenglingji lowers 0.82m, the daily average increasing rate of flood peak level slows 0.23m, the over-warning water level duration time reduces 62d; both have saved a great deal of flood control emergency rescue and disaster relief material consumption, manpower input, namely RMB 0.638 x 108yuan, and reduce the lake area flood damage 19.983 x 108yuan; in the process of 5 times flood prevention dispatching of the Three Gorges Reservoir, three times in July to alleviate flood control operation regime, disaster in Dongting Lake area the contribution of the largest, flood control operation effect is not very sensitive in June, and the impound floodwater sums to 80.7×108m3, not only of the lake area is no sense of flood control, but also because the flood retention of reservoir is more, the water of Sankou into the lake is greatly reduced, and Hunan sishui has begun to enter withered period, total amount into the lake gradually reduce, make the Dongting Lake water into withered period early; the ability of the Three Gorges Reservoir flood prevention dispatching operation to the flood prevention function is very limited, from the overall and long-term ways ,to enhance their ability of flood prevention and disaster alleviation of Dongting Lake area is still an important and comprehensive affairs.

scholarly journals Quantifying the effects of channel change on the discharge diversion of Jingjiang Three Outlets after the operation of the Three Gorges Dam

2016 ◽  
Vol 47 (S1) ◽  
pp. 161-174 ◽  
Author(s):  
Yanyan Li ◽  
Guishan Yang ◽  
Bing Li ◽  
Rongrong Wan ◽  
Weili Duan ◽  
...  
Keyword(s):  
Water Level ◽  
Yangtze River ◽  
Flood Control ◽  
Dongting Lake ◽  
Three Gorges Dam ◽  
Three Gorges ◽  
Channel Change ◽  
Channel Changes ◽  
The Three Gorges ◽  
The Three Gorges Dam

The Jingjiang Three Outlets (JTO) are the water-sediment connecting channels between the Yangtze River and the Dongting Lake. The discharge diversion of the JTO plays a dominant role in the flood control of the middle–lower Yangtze River, Dongting Lake evolution, and ecological environment. After the operation of the Three Gorges Dam (TGD), the river channels downstream experienced dramatic channel changes. To study the influences of the channel change on the discharge diversion, the authors analyzed the channel changes by water level–discharge rating curves and cross-sectional channel profiles in 1980–2014. Hence, changes in the water level with the same discharge and the decline of discharge diversion at the JTO were noted. Channel incision caused the water level with the same discharge to greatly decrease in the upper Jingjiang River. The water level with the same discharge significantly increased at the JTO as a result of the channel deposition. The channel changes contributed approximately 37.74% and 76.36%, respectively, to the amount and ratio of discharge diversion decreases after the TGD operation. The channel changes serve as the primary factor in facilitating the decrease in the discharge diversion ratio, but not the main factor for the decreased amount of the discharge diversion.

Hydrological Drought at Dongting Lake: Its Detection, Characterization, and Challenges Associated With Three Gorges Dam in Central Yangtze, China

2014 ◽  
Vol 28 (15) ◽  
pp. 5377-5388 ◽  
Author(s):  
Qun Huang ◽  
Zhandong Sun ◽  
Christian Opp ◽  
Tom Lotz ◽  
Jiahu Jiang ◽  
...  
Keyword(s):  
Dongting Lake ◽  
Hydrological Drought ◽  
Three Gorges Dam ◽  
Three Gorges

Assessment of hydrologic alteration induced by the Three Gorges Dam in Dongting Lake, China

2018 ◽  
Vol 34 (7) ◽  
pp. 686-696 ◽  
Author(s):  
Junxiang Cheng ◽  
Ligang Xu ◽  
Xiaolong Wang ◽  
Jiahu Jiang ◽  
Hailin You
Keyword(s):  
Dongting Lake ◽  
Three Gorges Dam ◽  
Three Gorges ◽  
Hydrologic Alteration ◽  
The Three Gorges ◽  
The Three Gorges Dam

Effects of Three Gorges Dam Project on Dongting Lake Wetlands

2016 ◽  
Vol 36 (20) ◽  
Author(s):  
黄维 HUANG Wei ◽  
王为东 WANG Weidong
Keyword(s):  
Dongting Lake ◽  
Three Gorges Dam ◽  
Three Gorges ◽  
Lake Wetlands

Study on Flow and Sediment Diversion at Four Inlets of Dongting Lake and Tendency and Influences of Erosion-Deposition Variation

2012 ◽  
Vol 212-213 ◽  
pp. 10-19 ◽  
Author(s):  
Ming Hua Deng ◽  
Ka Bo Liu ◽  
Zhen Yu Luan
Keyword(s):  
Dongting Lake ◽  
Three Gorges Project ◽  
Lake Area ◽  
Three Gorges ◽  
Middle Reach ◽  
Dongting Lake Area ◽  
The Three Gorges ◽  
Simulation Calculation ◽  
The Three Gorges Project ◽  
Sediment Model

Through analyzing 50-year hydraulic data and by means of water-sediment model of middle reach of Yangtze River for numerical simulation calculation, it studies flow and sediment diversion at Four Inlets of Dongting Lake and tendency and impacts of erosion-deposition variation, and predicts the conditions of Three Gorges Project after 30 years’ operation. It can be found that flow and sediment diversion at Four Inlets of Dongting Lake are decreasing and the zero flow period is constantly prolonged. River courses at Four Inlets and Dongting Lake continue to deposit and shrink, and the problem of water resource in the Dongting Lake area is becoming more serious than before. Operation of the Three Gorges Project has not changed this trend and with the time of the operation goes on, the trends of flow and sediment diversion and erosion-deposition at Four Inlets river courses and Dongting Lake will be more detrimental to the water resources in the Dongting Lake area and its problem will continue to deteriorate.

The impact of Three Gorges Dam on the downstream eco-hydrological environment and vegetation distribution of East Dongting Lake

Ecohydrology ◽  
2014 ◽  
Vol 8 (4) ◽  
pp. 738-746 ◽  
Author(s):  
Yong-hong Xie ◽  
Tang Yue ◽  
Chen Xin-sheng ◽  
Li Feng ◽  
Deng Zheng-miao
Keyword(s):  
Dongting Lake ◽  
Three Gorges Dam ◽  
Vegetation Distribution ◽  
Three Gorges ◽  
The Impact ◽  
Hydrological Environment
Sign in / Sign up

Export Citation Format

Share Document