scholarly journals Ecological water level and its safeguard measures in Lake Dongting

2020 ◽  
Vol 32 (5) ◽  
pp. 1529-1538
Author(s):  
WANG Hongxiang ◽  
◽  
ZHU Yongwei ◽  
ZHA Hufei ◽  
GUO Wenxian
Keyword(s):  
Water Level ◽  
Safeguard Measures ◽  
Ecological Water Level

scholarly journals Simplified Lake Surface Area Method for the Minimum Ecological Water Level of Lakes and Wetlands

Water ◽  
2018 ◽  
Vol 10 (8) ◽  
pp. 1056 ◽  
Author(s):  
Songpu Shang ◽  
Songhao Shang
Keyword(s):  
Water Level ◽  
Surface Area ◽  
Lake Level ◽  
Lake Ecosystem ◽  
Lake Surface ◽  
Area Method ◽  
Ecosystem Protection ◽  
Lake Morphology ◽  
Lake Surface Area ◽  
Ecological Water Level

The determination of the rational minimum ecological water level is the base for the protection of ecosystems in shrinking lakes and wetlands. Based on the lake surface area method, a simplified lake surface area method was proposed to define the minimum ecological lake level from the lake level-logarithm of the surface area curve. The curve slope at the minimum ecological lake level is the ratio of the maximum lake storage to the maximum surface area. For most practical cases when the curve cannot be expressed as a simple analytical function, the minimum ecological lake level can be determined numerically using the weighted sum method for an equivalent multi-objective optimization model that balances ecosystem protection and water use. This method requires fewer data of lake morphology and is simple to compute. Therefore, it is more convenient to use this method in the assessment of the ecological lake level. The proposed method was used to determine the minimum ecological water level for one freshwater lake, one saltwater lake, and one wetland in China. The results can be used in the lake ecosystem protection planning and the rational use of water resources in the lake or wetland basins.

scholarly journals New method and application of estimating ecological water level of the Lake Poyang

2015 ◽  
Vol 27 (5) ◽  
pp. 783-790 ◽  
Author(s):  
GAN Feng ◽  
◽  
TANG Lin ◽  
GUO Huaicheng ◽  
GAO Wei
Keyword(s):  
Water Level ◽  
New Method ◽  
Lake Poyang ◽  
Ecological Water Level

scholarly journals Simulation of multiple water source ecological replenishment for Chagan Lake based on coupled hydrodynamic and water quality models

2017 ◽  
Vol 17 (6) ◽  
pp. 1774-1784 ◽  
Author(s):  
L. Zhang ◽  
M. R. Hipsey ◽  
G. X. Zhang ◽  
B. Busch ◽  
H. Y. Li
Keyword(s):  
Water Quality ◽  
Water Level ◽  
Water Source ◽  
Scientific Basis ◽  
Water Diversion ◽  
Chagan Lake ◽  
Simulation Results ◽  
Ecological Water Level ◽  
Western Jilin ◽  
Grade Iii

Abstract Chagan Lake serves as an irrigation storage reservoir for the Qianguo Irrigation Area and an important ecological barrier in western Jilin. The coupled TUFLOW-FV and Aquatic Ecodynamic (AED2) models were used to simulate the hydrodynamic and water quality of Chagan Lake, and propose the water diversion scheme that could improve the water quality to reach Grade III and maintain the ecological water level. The simulation results showed a satisfactory agreement with observations. The total carrying loads of NH3-N, total nitrogen (TN) and total phosphorus (TP) for Chagan Lake were 1,147.6, 3,686.2 and 100.8 t from May to October. The range of the minimum amounts of water diversion to keep the water quality as Grade III and maintain the maximum ecological water level of 131.5 m for TN, TP were separately [32.60, 49.84, 57.19, 63.70, 70.91], [117.25, 135.26, 168.17, 190.65, 218.32] million m3 and the corresponding reduction amounts of farmland drainage for TN, TP were separately [4.03, 0, 0, 0, 0], [73.08, 61.88, 50.23, 40.94, 31.98] million m3 under the rainfall guarantee rates of 10%, 20%, 50%, 75%, 90%, respectively. The simulation results provide a scientific basis for the water quality improvement and ecological water supplement required for the interconnected river–lake system network (IRLSN) in Western Jilin Province.

scholarly journals Suitable ecological water level of the East Lake Dongting after the Three Gorges Project operation

2020 ◽  
Vol 32 (2) ◽  
pp. 417-427
Author(s):  
HUANG Yuyun ◽  
◽  
YU Minghui ◽  
LU Jing ◽  
SUN Zhaohua ◽  
...  
Keyword(s):  
Water Level ◽  
Three Gorges Project ◽  
Three Gorges ◽  
The Three Gorges ◽  
East Lake ◽  
The Three Gorges Project ◽  
Ecological Water Level ◽  
The East Lake

scholarly journals The calculation of the lowest ecological water level of Lake Bosten

2007 ◽  
Vol 19 (2) ◽  
pp. 177-181 ◽  
Author(s):  
LI Xinhu ◽  
◽  
SONG Yudong ◽  
ZAHNG Fendong ◽  
YE Mao
Keyword(s):  
Water Level ◽  
Ecological Water Level

scholarly journals Determination of ecological water-level in the eastern Lake Dongting with hydrological alterations

2013 ◽  
Vol 25 (3) ◽  
pp. 330-334 ◽  
Author(s):  
LIANG Jie ◽  
◽  
PENG Yeru ◽  
GUO Shenglian ◽  
LI Xiaodong ◽  
...  
Keyword(s):  
Water Level ◽  
Ecological Water Level
Sign in / Sign up

Export Citation Format

Share Document