Study on spatial-temporal evolution characteristics of landscape pattern in water-level-fluctuating zone of Three Gorges Reservoir Area within Kaixian County, Chongqing City

2011 ◽  
Author(s):  
Jianjun Tu ◽  
Cong Deng
Keyword(s):  
Water Level ◽  
Landscape Pattern ◽  
Three Gorges Reservoir ◽  
Temporal Evolution ◽  
Three Gorges Reservoir Area ◽  
Three Gorges ◽  
Reservoir Area ◽  
Chongqing City ◽  
Evolution Characteristics

scholarly journals Precipitation Changes in the Three Gorges Reservoir Area and the Relationship with Water Level Change

Sensors ◽  
2021 ◽  
Vol 21 (18) ◽  
pp. 6110
Author(s):  
Qin Li ◽  
Xiuguo Liu ◽  
Yulong Zhong ◽  
Mengmeng Wang ◽  
Manxing Shi
Keyword(s):  
Water Level ◽  
Three Gorges Reservoir ◽  
Precipitation Anomaly ◽  
Three Gorges Reservoir Area ◽  
Three Gorges ◽  
Reservoir Area ◽  
Precipitation Concentration ◽  
The Three Gorges ◽  
Before And After ◽  
Precipitation Changes

As the largest hydroelectric project worldwide, previous studies indicate that the Three Gorges Dam (TGD) affects the local climate because of the changes of hydrological cycle caused by the impounding and draining of the TGD. However, previous studies do not analyze the long-term precipitation changes before and after the impoundment, and the variation characteristics of local precipitation remain elusive. In this study, we use precipitation anomaly data derived from the CN05.1 precipitation dataset between 1988 and 2017 to trace the changes of precipitation before and after the construction of the TGD (i.e., 1988–2002 and 2003–2017), in the Three Gorges Reservoir Area (TGRA). Results showed that the annual and dry season precipitation anomaly in the TGRA presented an increasing trend, and the precipitation anomaly showed a slight decrease during the flood season. After the impoundment of TGD, the precipitation concentration degree in the TGRA decreased, indicating that the precipitation became increasingly uniform, and the precipitation concentration period insignificantly increased. A resonance phenomenon between the monthly average water level and precipitation anomaly occurred in the TGRA after 2011 and showed a positive correlation. Our findings revealed the change of local precipitation characteristics before and after the impoundment of TGD and showed strong evidence that this change had a close relationship with the water level.

Restoration of Natural Herbaceous Vegetation of Xiangxi River’s Water-Level Fluctuation Zone after the Flooding in Three Gorges Reservoir Area

2012 ◽  
Vol 599 ◽  
pp. 739-743 ◽  
Author(s):  
Cheng Hu Zhang ◽  
Ting Ting Song ◽  
Ju Liu ◽  
Hui Juan Xia ◽  
Jian Zhu Wang
Keyword(s):  
Water Level ◽  
Plant Communities ◽  
Three Gorges Reservoir ◽  
Life Story ◽  
Water Level Fluctuation ◽  
Three Gorges Reservoir Area ◽  
Level Fluctuation ◽  
Three Gorges ◽  
Reservoir Area ◽  
Water Level Fluctuation Zone

Water-level fluctuation zone (WLFZ) is the security barrier of reservoir. Herbaceous vegetation’s restoration characteristic of Xiangxi River’s WLFZ in Three Gorges reservoir area was investigated by using ecological methods. The results show that: The main plant types are annual herbs and perennial herbs, and plant communities are patchiness or zonal distribution. Two absolute dominant plant communities are build by Cynodondactylon(Linn.)Pers. and Rhizoma Cyperi (Nutgrass Galingale Rhizome) in the 145-155m area, and annual herbs are mainly distributed above the 155m area. As the elevation increasing, the β diversity increases. There are 22 dominant species of herbaceous in Xiangxi River’s WLFZ, 16 plants could complete life story, and 5 plants’ life story are threatened by impounding. Polygonum lapathifolium Linn.may not complete its life story.

scholarly journals The Coupling Effect of Rainfall and Reservoir Water Level Decline on the Baijiabao Landslide in the Three Gorges Reservoir Area, China

Geofluids ◽  
2017 ◽  
Vol 2017 ◽  
pp. 1-12 ◽  
Author(s):  
Nenghao Zhao ◽  
Bin Hu ◽  
Qinglin Yi ◽  
Wenmin Yao ◽  
Chong Ma
Keyword(s):  
Water Level ◽  
Three Gorges Reservoir ◽  
Coupling Effect ◽  
Three Gorges Reservoir Area ◽  
Three Gorges ◽  
Reservoir Water ◽  
Reservoir Water Level ◽  
Reservoir Area ◽  
The Three Gorges ◽  
Water Level Decline

Rainfall and reservoir level fluctuation are two of the main factors contributing to reservoir landslides. However, in China’s Three Gorges Reservoir Area, when the reservoir water level fluctuates significantly, it comes at a time of abundant rainfall, which makes it difficult to distinguish which factor dominates the deformation of the landslide. This study focuses on how rainfall and reservoir water level decline affect the seepage and displacement field of Baijiabao landslide spatially and temporally during drawdown of reservoir water level in the Three Gorges Reservoir Area, thus exploring its movement mechanism. The monitoring data of the landslide in the past 10 years were analyzed, and the correlation between rainfall, reservoir water level decline, and landslide displacement was clarified. By the numerical simulation method, the deformation evolution mechanism of this landslide during drawdown of reservoir water level was revealed, respectively, under three conditions, namely, rainfall, reservoir water level decline, and coupling of the above two conditions. The results showed that the deformation of the Baijiabao landslide was the coupling effect of rainfall and reservoir water level decline, while the latter effect is more pronounced.

Comparison of the rise of water level in the typical catchments, Three Gorges Reservoir area

2016 ◽  
Vol 13 (4) ◽  
pp. 715-724
Author(s):  
Hong-yang Sun ◽  
Xiao-yong Liao ◽  
Zhong-mei Xia ◽  
Jing He
Keyword(s):  
Water Level ◽  
Three Gorges Reservoir ◽  
Three Gorges Reservoir Area ◽  
Three Gorges ◽  
Reservoir Area
Sign in / Sign up

Export Citation Format

Share Document