eDNA biomonitoring revealed the ecological effects of water diversion projects between Yangtze River and Tai Lake

2021 ◽  
pp. 117994
Author(s):  
Lijuan Zhang ◽  
Jianghua Yang ◽  
Yong Zhang ◽  
Junzhe Shi ◽  
Hongxia Yu ◽  
...  
Keyword(s):  
Yangtze River ◽  
Ecological Effects ◽  
Water Diversion ◽  
Tai Lake

scholarly journals Dual-Source Optimization of the “Diverting Water from the Yangtze River to Tai Lake (DWYRTL)” Project Based on the Euler Method

Complexity ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Ruichen Xu ◽  
Yong Pang ◽  
Zhibing Hu ◽  
John Paul Kaisam
Keyword(s):  
Flow Rate ◽  
Yangtze River ◽  
Water Exchange ◽  
Euler Method ◽  
Water Diversion ◽  
Source Water ◽  
Single Source ◽  
The Yangtze River ◽  
Tai Lake ◽  
Dual Source

Appropriate water body diversion can improve the water quality of Tai Lake. Excessive diversion of water would, however, dramatically alter the local flow fields, which are not conducive to the growth of aquatic plants and the stability of ecosystems. The current “Diverting Water from the Yangtze River to Tai Lake (DWYRTL)” project uses a single water source, the Wangyu River, for diversion, a model that may significantly affect the nearby flow rate or uniformity of the lake and is not conducive to the long-term stability of the aquatic ecosystem in the Tai Lake district of the eastern part of the lake. In order to simulate the different situations of single- and dual-source water diversions (Wangyu-Xinmeng Rivers) in Tai Lake, we based this study on a three-dimensional hydrodynamic model coupled with the Euler method, which can accurately calculate the water exchange rates in the different districts of Tai Lake. The results show that (1) it is recommended that the total annual diversion of water should not exceed 20 × 108 m3; (2) the wind field is the most important factor determining the distribution of spatial water exchange; (3) under wind-free conditions, the flow rate of a single-source diversion of water is approximately 50% higher than that of dual-source diversion; and (4) water diversion under the prevailing conditions of the northwest wind in winter will reduce the semiexchange period of the eastern part of the lake area from 50 to 30 days, significantly changing the nearby district’s uniformity, leading to ecological risks. Therefore, it is recommended that the dual-source water diversion mode be used in winter and windless season, and single-source water diversion mode be used in other seasons.

scholarly journals Research on Water Environment Regulation of Artificial Playground Lake Interconnected Yangtze River

2018 ◽  
Vol 15 (10) ◽  
pp. 2110 ◽  
Author(s):  
Weiwei Song ◽  
Xingqian Fu ◽  
Yong Pang ◽  
Dahao Song ◽  
Qing Xu ◽  
...  
Keyword(s):  
Water Quality ◽  
Water Level ◽  
Yangtze River ◽  
Flood Control ◽  
Numerical Models ◽  
Rapid Development ◽  
Control Level ◽  
Water Environment ◽  
Water Diversion ◽  
Coupled Models

With the rapid development of China, water pollution is still a serious problem despite implementation of control measures. Reasonable water environment management measures are very important for improving water quality and controlling eutrophication. In this study, the coupled models of hydrodynamics, water quality, and eutrophication were used to predict artificial Playground Lake water quality in the Zhenjiang, China. Recommended “unilateral” and “bilateral” river numerical models were constructed to simulate the water quality in the Playground Lake without or with water diversion by pump, sluice and push pump. Under “unilateral” and “bilateral” river layouts, total nitrogen and total phosphorus meet the landscape water requirement through water diversion. Tourist season in spring and summer and its suitable temperature result in heavier eutrophication, while winter is lighter. Under pumping condition, water quality and eutrophication of “unilateral” river is better than “bilateral” rivers. Under sluice diversion, the central landscape lake of “unilateral river” is not smooth, and water quality and eutrophication is inferior to the “bilateral”. When the water level exceeds the flood control level (4.1 m), priority 1 is launched to discharge water from the Playground Lake. During operation of playground, when water level is less than the minimum level (3.3 m), priority 2 is turned on for pumping diversion or sluice diversion to Playground Lake. After opening the Yangtze river diversion channel sluice, priority 3 is launched for sluice diversion to the Playground Lake. When the temperature is less than 15 °C, from 15 °C to 25 °C and higher than 25 °C, the water quality can be maintained for 15 days, 10 days and 7 days, respectively. Corresponding to the conditions of different priority levels, reasonable choices of scheduling measures under different conditions to improve the water quality and control eutrophication of the Playground Lake. This article is relevant for the environmental management of the artificial Playground Lake, and similar lakes elsewhere.

scholarly journals Effects of Water Diversion from Yangtze River to Lake Taihu on the Phytoplankton Habitat of the Wangyu River Channel

Water ◽  
2018 ◽  
Vol 10 (6) ◽  
pp. 759 ◽  
Author(s):  
Jiangyu Dai ◽  
Shiqiang Wu ◽  
Xiufeng Wu ◽  
Wanyun Xue ◽  
Qianqian Yang ◽  
...  
Keyword(s):  
Yangtze River ◽  
Lake Taihu ◽  
River Channel ◽  
Water Diversion

Antibiotics pollution in Gonghu Bay in the period of water diversion from Yangtze River to Taihu Lake

2018 ◽  
Vol 77 (11) ◽  
Author(s):  
Yanwen Qin ◽  
Quan Wen ◽  
Yingqun Ma ◽  
Chenchen Yang ◽  
Zhichao Liu
Keyword(s):  
Yangtze River ◽  
Taihu Lake ◽  
Water Diversion

Occurrence of additive brominated flame retardants in aquatic organisms from Tai Lake and Yangtze River in Eastern China, 2009–2012

Chemosphere ◽  
2014 ◽  
Vol 114 ◽  
pp. 340-346 ◽  
Author(s):  
Guanyong Su ◽  
David Saunders ◽  
Yijun Yu ◽  
Hongxia Yu ◽  
Xiaowei Zhang ◽  
...  
Keyword(s):  
Yangtze River ◽  
Flame Retardants ◽  
Eastern China ◽  
Aquatic Organisms ◽  
Brominated Flame Retardants ◽  
Tai Lake

Optimizing Study on Navigation Condition of the Outlet of Water Diversion Navigation Project from Yangtze River to Hanjiang River

2014 ◽  
Vol 1065-1069 ◽  
pp. 625-628
Author(s):  
Jun Tao Li ◽  
Wei Peng
Keyword(s):  
Yangtze River ◽  
Water Diversion ◽  
Outlet Section ◽  
Lower Reach ◽  
Engineering Measures ◽  
Hanjiang River ◽  
Design Proposal ◽  
Navigation Condition ◽  
Ship Lock

The studies have been made on the layout and navigation condition at the outlet section of Water Diversion Navigation Project from Yangtze River to Hanjiang River based on the method with integration of models such as stream physics, remote controlled self-propelled ship, stream mathematics and ship manipulation movement mathematics. At first, it is introduced design proposal of navigation project for entrance of lower reach under the Gaoshibei ship lock section and merging estuary with Hanjiang estuary and then the detail analysis is made on various factors of the design proposal affecting the navigation conditions. Finally, it suggested optimizing layout satisfactory to the safety navigation through improvement of navigation conditions with adopted many engineering measures to the deficiency of design proposal on the navigation conditions.

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