Article
Geosciences, Multidisciplinary
Shi Ren, Bangwen Zhang, Wei-Jie Wang, Yuan Yuan, Chao Guo
Summary: Through measures like upstream sediment trapping and sediment peak regulation, the incoming sediment load of TGR has been significantly reduced, successfully addressing sedimentation issues and providing valuable lessons for reservoir management elsewhere.
Article
Environmental Sciences
Jiaojiao Yang, Yiming Ma, Shanze Li, Jingfu Wang, Zuxue Jin, Danhao Li, Yuchun Wang
Summary: This study evaluated the contribution of sediment internal phosphorus (P) and revealed the mechanisms controlling sediment P release in the Three Gorges Reservoir (TGR). The results indicated that sediment P release may trigger harmful algal blooms in the overlying water. These findings provide important scientific and technical support for mitigating internal P pollution in large deep-water reservoirs.
JOURNAL OF SOILS AND SEDIMENTS
(2023)
Article
Energy & Fuels
Shaokun He, Shenglian Guo, Jiabo Yin, Zhen Liao, He Li, Zhangjun Liu
Summary: The proposed framework in this study for joint and optimal impoundment operation for cascade reservoirs achieved significant improvements. Results show that the optimal policy can increase impoundment efficiency, hydropower generation, and reduce CO2 emissions while maintaining low flood control risk, compared to traditional operating rules.
Article
Geosciences, Multidisciplinary
Kalpna Gahalaut, Rajesh Rekapalli
Summary: This article explores the role of reservoir impoundment in mobilizing nearby faults and increasing post-impoundment seismicity in the Three Gorges Reservoir region. The study finds that reservoir impoundment can induce shear failure on earthquake-causing faults, but other factors such as dissolution and reduced cohesion in the rock mass also contribute to the enhanced seismicity. The analysis suggests that fluid-assisted earthquakes and purely tectonic earthquakes both occur in the region, indicating that various factors play a significant role in post-impoundment seismicity.
Article
Environmental Sciences
Xue Li, Jian Sha, Zhong-Liang Wang
Summary: This study found that the construction of the Three Gorges Reservoir increased the relative humidity of the Yangtze River Basin, providing a more humid climate for the downstream area, and could alleviate agricultural drought in the region. The spatial impacts of the reservoir on regional climate change were significant, while the influence of ENSO could not be observed at the station scale.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
David Shankman, Xijun Lai
Summary: The Three Gorges Dam is built mainly for flood control, reducing peak discharge in the upper basin. However, it does not have the ability to prevent severe floods caused by abnormally high rainfall throughout the Changjiang basin. The dam also has no impact on the large tributaries in the middle Changjiang, and the decreasing volume of Poyang and Dongting Lakes further affects the interaction between the Changjiang River and the lakes.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Biodiversity Conservation
Zijun Xiao, Jian Sun, Binliang Lin, Bing Yuan
Summary: The water temperature in the Yangtze River has been found to be changing over the past few decades, primarily due to climate change. The study also shows that reservoir operation has reduced the variability of water temperature, resulting in a smoother process. Additionally, the correlation between water and air temperature varies on different timescales.
ECOLOGICAL INDICATORS
(2023)
Article
Environmental Sciences
Zhi Yin, Hongbin Zhang, Guangming Tan, Yiwei Lyu, Zhiyong Feng, Caiwen Shu, Jingwen Wang, Guangyue Zhang
Summary: Reservoir construction can impact downstream flow and sediment transport, leading to adjustments in the morphodynamics of a river, especially riverbed instability. Through a study on the Wuhan reach of the Yangtze River, it was found that cumulative erosion has significantly increased, resulting in changes in channel stability. Influenced by the Coriolis force, the lateral migrate intensity of the thalweg has also increased.
Article
Ecology
Dongdong Zhai, Bo Li, Fei Xiong, Wei Jiang, Hongyan Liu, Chenhao Luo, Xinbin Duan, Daqing Chen
Summary: Non-indigenous fish invasions pose a serious threat to global fish diversity and aquatic ecosystem security. Studying invasion sources, pathways, and genetic mechanisms through population genetics is helpful for the management and control of non-indigenous fishes.
FRONTIERS IN ECOLOGY AND EVOLUTION
(2022)
Article
Environmental Sciences
Kalina C. Grabb, Shuai Ding, Xiaoyan Ning, Su Mei Liu, Bao Qian
Summary: The study investigated the changes in nitrogen sources and cycling in the Three Gorges Reservoir and downstream the Changjiang, finding that the construction of the Three Gorges Dam and anthropogenic inputs have impacted the ecosystem, highlighting the significant influence of pollution sources on nitrogen cycling.
ENVIRONMENTAL RESEARCH
(2021)
Article
Environmental Sciences
Yu Gao, Li Chen, Wei Zhang, Xin Li, Quanxi Xu
Summary: This study examined the impacts of the Three Gorges Dam impoundment on the flow process, sediment transport, and river morphology in the downstream reaches of the Yangtze River. Results indicated that characteristic discharge decreased post-dam construction, with significant spatial variations along the river. The study provides valuable insights for assessing the channel-forming capacity of flow-sediment regimes worldwide and predicting river morphology evolution.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Zhenhua Zhang, Banglu Xi, Xiang Huang, Leilei Wang
Summary: This study investigates the deformation mechanism of anti-piles in the Majiagou landslide in the Three Gorges Reservoir Area and explains the appearance of cracks between the anti-pile and sliding body behind the piles from the perspectives of embedded rock degradation and declining water level. The results show that the rock resistances in front of anti-piles gradually decrease and the embedding effect of anti-piles weakens due to the embedded rock degradation, resulting in plastic deformation in the rock and forward inclination of anti-piles. Additionally, the declining water level leads to an increasing seepage force and sliding deformation of the sliding body in front of the anti-piles, weakening the front support of the anti-pile.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2023)
Article
Environmental Sciences
Xuhai Yang, Haibin Xiong, Dongfeng Li, Yitian Li, Yong Hu
Summary: The operation of the Three Gorges Dam leads to significant geomorphic changes in the middle-lower Yangtze River. The downstream areas experienced various responses, including erosion, channel incision, riverbank retreat, and bed material coarsening. The impact of the dam is most severe in the Yichang-Luoshan Reach and decreases gradually downstream. The findings have practical implications for river management and ecological assessment in similar alluvial rivers.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
C. Juez, N. Garijo, M. A. Hassan, E. Nadal-Romero
Summary: In this study, wavelet transformation method was used to analyze data from over 50 years at the Pingshan station on the Upper Changjiang River in order to identify the time-scale dependency of suspended sediment patterns. Short time scales are driven by climatic factors, while long time scales are controlled by high flow events and sediment storage within the river reach.
WATER RESOURCES RESEARCH
(2021)
Article
Engineering, Electrical & Electronic
Tong Liu, Tao Chen, Ruiqing Niu, Antonio Plaza
Summary: In this study, an accurate Landslide Detection Mapping (LDM) model was constructed based on convolutional neural networks, residual neural networks, and DenseNets, considering ZY-3 high spatial resolution data and conditioning factors. The experimental results demonstrated that these models performed well, with accuracy above 0.95. DenseNet incorporating RS images and CFs outperformed other models in terms of evaluation metrics, with improvements in Kappa coefficients and ACC. Elevation factor was identified as the most important factor in the landslide model construction experiment.
IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
(2021)