Decadal Sedimentation in China's Largest Freshwater Lake, Poyang Lake

2018 ◽  
Vol 19 (8) ◽  
pp. 2384-2396
Author(s):  
Xuefei Mei ◽  
Juan Du ◽  
Zhijun Dai ◽  
Jinzhou Du ◽  
Jinjuan Gao ◽  
...  
Keyword(s):  
Poyang Lake ◽  
Freshwater Lake ◽  
Lake Poyang

scholarly journals Dramatic variations in emergent wetland area in China's largest freshwater lake, Poyang Lake

2016 ◽  
Vol 96 ◽  
pp. 1-10 ◽  
Author(s):  
Xuefei Mei ◽  
Zhijun Dai ◽  
Sergio Fagherazzi ◽  
Jiyu Chen
Keyword(s):  
Poyang Lake ◽  
Freshwater Lake ◽  
Wetland Area ◽  
Lake Poyang

scholarly journals Exploring the water quality driving mechanism in Poyang Lake, the largest freshwater lake in China

2019 ◽  
Vol 20 (2) ◽  
pp. 700-711 ◽  
Author(s):  
Hua Wang ◽  
John Paul Kaisam ◽  
Shaowen Fang ◽  
Yanqing Deng ◽  
Bao Li ◽  
...  
Keyword(s):  
Water Quality ◽  
Atmospheric Deposition ◽  
Poyang Lake ◽  
Freshwater Lake ◽  
Driving Mechanism ◽  
Ecosystem Structure ◽  
Lake Water Quality ◽  
Sediment Release ◽  
The Impact ◽  
Boundary Input

Abstract Poyang Lake, the largest freshwater lake and typical river-connected lake in China, was selected as a research area. A method was first proposed to quantitatively explore the mechanisms driving water quality evolution, in which the weights of horizontal boundary input, self-purification, vertical atmospheric deposition and sediment release could be determined. A two-dimensional water environment model for Poyang Lake was developed in the framework of the Finite Volume Method and calibrated against the field investigated data. Four typical months in a common-water year were determined for numerical experiments to investigate the temporal and spatial water quality driving mechanisms in Poyang Lake. The results suggested that boundary input and self-purification have the greatest effect on dominating the water quality in Poyang Lake, followed by atmospheric deposition and sediment release. The driving weights of these four factors are 57.2%, 26.5%, 9.3%, and 7.0%, respectively. However, the impact on lake water quality of external water quality, aquatic ecosystem structure, precipitation distribution, and meteorological conditions, which are attributed to the disparities in geographical situation, varied significantly with seasons and locations.

scholarly journals Identification of bacterial communities in sediments of Poyang Lake, the largest freshwater lake in China

SpringerPlus ◽  
2016 ◽  
Vol 5 (1) ◽  
Author(s):  
Wenbo Kou ◽  
Jie Zhang ◽  
Xinxin Lu ◽  
Yantian Ma ◽  
Xiaozhen Mou ◽  
...  
Keyword(s):  
Bacterial Communities ◽  
Poyang Lake ◽  
Freshwater Lake

scholarly journals Modelling the Impacts of Bathymetric Changes on Water Level in China’s Largest Freshwater Lake

Water ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 1469 ◽  
Author(s):  
Lingyan Qi ◽  
Jiacong Huang ◽  
Junfeng Gao ◽  
Zhen Cui
Keyword(s):  
Water Level ◽  
Water Resource Management ◽  
Freshwater Lake ◽  
Lake Ecosystem ◽  
Spatial Gradient ◽  
Dramatic Decline ◽  
Hydrodynamic Processes ◽  
Lake Poyang ◽  
The Stability ◽  
Bathymetric Changes

A recent dramatic decline in water level during the dry season in China’s largest freshwater lake (Lake Poyang) significantly influenced water availability and biogeochemical processes. To learn the potential causes of water level decline, this study investigated the hydrodynamic response to bathymetric changes during three typical hydrological years by scenario simulation using Environmental Fluid Dynamics Code (EFDC). The simulation results indicated that bathymetric changes resulted in a water level decrease during a low water level period. Inter-annual variation in the decrease rate implied that water level in typical dry and wet years were influenced more significantly than that in moderate hydrological years. A spatial gradient in the distribution of water level changes was also observed, which was mainly concentrated in the main channel. Water velocities also slowed down, weakly corresponding to the decrease in water level during the low water level period. Overall, bathymetric changes caused by sand mining contributed to water level and velocity variations, influencing the stability and sustainability of the lake ecosystem. This study can potentially enhance our understanding of the hydrodynamic processes in Lake Poyang and support water resource management.

Temporal and spatial variability of phytoplankton in Lake Poyang: The largest freshwater lake in China

2013 ◽  
Vol 39 (3) ◽  
pp. 476-483 ◽  
Author(s):  
Zhaoshi Wu ◽  
Yongjiu Cai ◽  
Xia Liu ◽  
Cai Ping Xu ◽  
Yuwei Chen ◽  
...  
Keyword(s):  
Spatial Variability ◽  
Freshwater Lake ◽  
Temporal And Spatial Variability ◽  
Lake Poyang ◽  
Temporal And Spatial
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