Tidal level trend test and extraction in downstream of the Yangtze River

2012 ◽  
pp. 509-513
Author(s):  
Guofang Li ◽  
Miaoyuan Xiao ◽  
Xinyi Xiang
Keyword(s):  
Yangtze River ◽  
Trend Test ◽  
The Yangtze River ◽  
Tidal Level

scholarly journals Climatic Variability and Periodicity for Upstream Sub-Basins of the Yangtze River, China

Water ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 842 ◽  
Author(s):  
Naveed Ahmed ◽  
Genxu Wang ◽  
Martijn J. Booij ◽  
Adeyeri Oluwafemi ◽  
Muhammad Zia-ur-Rahman Hashmi ◽  
...  
Keyword(s):  
Yangtze River ◽  
Hydrological Cycle ◽  
System Modeling ◽  
Climatic Variability ◽  
Critical Role ◽  
Trend Test ◽  
The Yangtze River ◽  
Temperature And Precipitation ◽  
Pettitt Test ◽  
Influence Of Temperature On

The headwaters of the Yangtze River are located on the Qinghai Tibetan Plateau, which is affected by climate change. Here, treamflow trends for Tuotuohe and Zhimenda sub-basins and relations to temperature and precipitation trends during 1961–2015 were investigated. The modified Mann–Kendall trend test, Pettitt test, wavelet analysis, and multivariate correlation analysis was deployed for this purpose. The temperature and precipitation significantly increased for each sub-basin, and the temperature increase was more significant in Tuotuohe sub-basin as compared to the Zhimenda sub-basin. A statistically significant periodicity of 2–4 years was observed for both sub-basins in different time spans. Higher flow periodicities for Tuotuohe and Zhimenda sub-basin were found after 1991 and 2004, respectively, which indicates that these are the change years of trends in streamflows. The influence of temperature on streamflow is more substantial in Tuotuohe sub-basin, which will ultimately impact the melting of glaciers and snowmelt runoff in this sub-basin. Precipitation plays a more critical role in the Zhimenda streamflow. Precipitation and temperature changes in the headwaters of the Yangtze River will change the streamflow variability, which will ultimately impact the hydropower supply and water resources of the Yangtze Basin. This study contributes to the understanding of the dynamics of the hydrological cycle and may lead to better hydrologic system modeling for downstream water resource developments.

scholarly journals Responses of Hydrodynamics and Saline Water Intrusion to Typhoon Fongwong in the North Branch of the Yangtze River Estuary

2021 ◽  
Vol 11 (19) ◽  
pp. 8986
Author(s):  
Cuiping Kuang ◽  
Kuo Chen ◽  
Jie Wang ◽  
Yunlong Wu ◽  
Xu Liu ◽  
...  
Keyword(s):  
Yangtze River ◽  
Saline Water ◽  
River Estuary ◽  
Yangtze River Estuary ◽  
The Yangtze River ◽  
Tidal Level ◽  
Saline Water Intrusion ◽  
Water Intrusion ◽  
The North ◽  
The Yangtze River Estuary

The typhoon impact on an estuarine environment is complex and systematic. A three-dimensional hydrodynamic and salinity transport model with a high-resolution, unstructured mesh and a spatially varying bottom roughness, is applied to investigate the effects of a historical typhoon, Fongwong, which affected Shanghai, on the hydrodynamics and saline water intrusion in the North Branch (NB) of the Yangtze River Estuary (YRE). The model is well validated through observation data of the tidal level, current velocity and direction, and salinity. The numerical results of this typhoon event show that: (1) the tidal level and its range increase toward the upstream part of the NB due to the combined effects of the funnel-shaped plane geometry of the NB and the typhoon; (2) the current velocity and the flow spilt ratio of the NB varies with the tides, with a maximum increase by 0.13 m/s and 26.61% during the flood tide and a maximum decrease by 0.12 m/s and 83.33% during the ebb tide, i.e., the typhoon enhances the flood current and weakens the ebb current; (3) the salinity value increases in the NB to a maximum of 1.40 psu and water is well-mixed in the vertical direction in the typhoon’s stable and falling period. The salinity distribution gradually recovered to the normal salt wedge pattern in 3 days following the typhoon. Although this study is based on a site-specific model, the findings will provide valuable insights into saline water intrusion under typhoon events, and thus assist in implementing more efficient estuarine management strategies for drinking water safety.

Yiling Multi-span Cable-Stayed Bridge over the Yangtze River

2004 ◽  
Vol 88 (8) ◽  
pp. 59-64
Author(s):  
Changyu Shao ◽  
Qinger Deng
Keyword(s):  
Yangtze River ◽  
The Yangtze River ◽  
Cable Stayed Bridge

Composition and changes in abundance and biomass of fish assemblages along the Jingjiang section of the Yangtze River over the last decade

2014 ◽  
Vol 21 (6) ◽  
pp. 688-698
Author(s):  
Sun Shasha ◽  
Tang Wenqiao ◽  
Guo Hongyi ◽  
Li Huihua ◽  
Liu Dong ◽  
...  
Keyword(s):  
Yangtze River ◽  
Fish Assemblages ◽  
The Yangtze River
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