scholarly journals Macrophytes restoration and its effects on eutrophication control in rehabilitated lakeshore zone of Gonghu Bay, Lake Taihu

2021 ◽  
Vol 33 (6) ◽  
pp. 1626-1638
Author(s):  
Yao Cheng ◽  
◽  
Hu Xiaozhen ◽  
Jiang Xia ◽  
Chen Junyi ◽  
...  
Keyword(s):  
Lake Taihu ◽  
Eutrophication Control

Investigation on Nutrient Loads of Lake Taihu in China

2014 ◽  
Vol 989-994 ◽  
pp. 1286-1291 ◽  
Author(s):  
Hua Wang ◽  
Kun Xia ◽  
Bao Li ◽  
Yi Yi Zhou
Keyword(s):  
River Runoff ◽  
Laboratory Experiments ◽  
Lake Taihu ◽  
Water Environment ◽  
Temporal Distribution ◽  
Bulk Deposition ◽  
Nutrient Loads ◽  
Environment Protection ◽  
Eutrophication Control ◽  
Internal Release

Based on measured data and laboratory experiments, the spatial and temporal distribution of nutrient loads of Lake Taihu from the sources of river runoff, atmospheric bulk deposition and internal release was quantitatively analyzed. Results showed that: (1) In 2011, annual river inputs of total phosphorus (TP) and total nitrogen (TN) respectively were 2382.4 tons and 50245.0 tons, and annual river outputs of TP and TN respectively were 849.1 tons and 24236.7 tons, Huxi area was the major transverse source of nutrients as a large proportion of TP(71.6%) and TN(66.2%). (2) Annual nutrient loads of Lake Taihu were 3306.6 tons TP and 48007.0 tons TN, of which the contribution of river runoff, atmospheric bulk deposition and internal release to TP accounted for 46.3%, 38.3% and 15.4%, and that to TN accounted for 54.2%, 43.7% and 2.1%, respectively. (3) Inputs of nutrients to Lake Taihu were higher in summer (June to August), of which 983.9 tons TP and 8874.9 tons TN in June, 1420.9 tons TP and 7463.3 tons TN in July, 1347.1 tons TP and 7181.3 tons TN in August. The results have great significance for eutrophication control and water environment protection in Lake Taihu.

scholarly journals Sulfur Development in the Water-Sediment System of the Algae Accumulation Embay Area in Lake Taihu

Water ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1817 ◽  
Author(s):  
Cheng Liu ◽  
Shiguang Shao ◽  
Lei Zhang ◽  
Yiheng Du ◽  
Kaining Chen ◽  
...  
Keyword(s):  
Surface Sediments ◽  
Lake Taihu ◽  
Field Investigation ◽  
Acid Volatile Sulfide ◽  
Short Term ◽  
Overlying Water ◽  
Eutrophication Control ◽  
Algae Blooms ◽  
Water And Sediment ◽  
Eutrophic Shallow Lakes

Sulfur development in water-sediment systems is closely related to eutrophication and harmful algae blooms (HABs). However, the development of sulfur in water-sediment systems during heavy algae accumulation still remains unclear, especially in hyper-eutrophic shallow lakes. In this study, a quarterly field investigation was carried out for a year in the algae accumulated embay area of Lake Taihu, accompanied by a short-term laboratory experiment on algae accumulation. The results show that hydrogen sulfide and methanethiol dominated the volatile sulfur compounds (VSCs) in the water during non-accumulation seasons, whereas the concentrations of dimethyl sulfides increased during heavy algae accumulation, both in the field and the laboratory. An increase in the acid volatile sulfide (AVS) in the surface sediments was also discovered together with the increase in dimethyl sulfides. The depletion of oxygen in the overlying water and sediment–water interface during the heavy algae accumulation and decomposition was found to be closely related to both the increase in VSCs in the overlying water and increase in AVS in the sediment. The increased concentrations of these reductive sulfocompounds might aggravate the eutrophication and HABs and should be given more consideration in future eutrophication control plans for lakes.

scholarly journals Degradation Characteristics of Phosphorus in Phytoplankton-Derived Particulate Organic Matter and Its Effects on the Growth of Phosphorus-Deficient Microcystis aeruginosa in Lake Taihu

2019 ◽  
Vol 16 (12) ◽  
pp. 2155 ◽  
Author(s):  
Ming Kong ◽  
Jianying Chao ◽  
Wei Han ◽  
Chun Ye ◽  
Chun-Hua Li ◽  
...  
Keyword(s):  
Organic Matter ◽  
Microcystis Aeruginosa ◽  
Particulate Organic Matter ◽  
Lake Taihu ◽  
Degradation Mechanism ◽  
Eutrophication Control ◽  
Cyanobacteria Blooms ◽  
P Release ◽  
Early Degradation ◽  
Total P

To illustrate the contribution of phytoplankton-derived particulate organic matter (PPOM) to endogenous phosphorus (P) cycling and its effects on cyanobacteria blooms, PPOM characteristics, the degradation mechanism, and the growth of P-deficient Microcystis aeruginosa were studied in Lake Taihu. Results showed that PPOM is the most important P pool in the water column during cyanobacteria bloom, accounting for more than 80% of the total P (TP) in the water. During PPOM degradation, the particulate orthophosphate (Ortho-P) is the main species of P release from PPOM in the early degradation stage. The variations of polyphosphate (Poly-P) and phosphodiesters (Diester-P) contents were most significant, which were degraded completely within four days and eight days. Cell density and growth rate of M. aeruginosa using PPOM as P source were similar to those growing on Na2HPO4. The above results show that P in PPOM can be converted into available P by degradation, thus promoting the growth of M. aeruginosa. Therefore, the contribution of P release from PPOM degradation needs to be paid attention to in lake eutrophication control in the future.

Secondary impacts of eutrophication control activities in shallow lakes: Lessons from aquatic macrophyte dynamics in Lake Taihu from 2000 to 2015

2019 ◽  
Vol 38 (4) ◽  
pp. 802-817 ◽  
Author(s):  
Yuchao Zhang ◽  
Ronghua Ma ◽  
Qichun Liang ◽  
Baohua Guan ◽  
Steven Loiselle
Keyword(s):  
Shallow Lakes ◽  
Aquatic Macrophyte ◽  
Lake Taihu ◽  
Eutrophication Control

Contemporary issues in watershed and water quality modeling for eutrophication control

1998 ◽  
Vol 37 (3) ◽  
pp. 93-102
Author(s):  
Robert V. Thomann ◽  
Lewis C. Linker
Keyword(s):  
Coastal Waters ◽  
Water Quality Modeling ◽  
Significant Decline ◽  
Suspension Feeding ◽  
Watershed Model ◽  
Nitrogen And Phosphorus ◽  
Overlying Water ◽  
Chesapeake Bay Watershed ◽  
Eutrophication Control ◽  
Quality Modeling

Three issues are discussed: controllability of nonpoint nutrient loadings using watershed models; the sometimes counter intuitive results from eutrophication models from nutrient controls for coastal waters; and the potential significant interaction of improvement in habitat for suspension feeding bivalves. For the Chesapeake Bay watershed model, and for Limit of Technology (LOT) controls, a 16% and 45% reduction in nitrogen and phosphorus, respectively, is calculated. For the Bay, it is concluded that removal of phosphorus only is less effective than nitrogen in improving bottom water DO because of differential transport of nitrogen downstream. For the Delaware estuary, a significant decline in phytoplankton chlorophyll has been observed in the absence of any nutrient controls but in the presence of improved DO. A simple model is offered that hypothesized an increase in benthic bivalve filtration of overlying water as a result of improvement in DO.

A holistic understanding of cobalt cycling and limiting roles in the eutrophic Lake Taihu

Chemosphere ◽  
2021 ◽  
pp. 130234
Author(s):  
Xianfang Fan ◽  
Shiming Ding ◽  
Shuaishuai Gao ◽  
Musong Chen ◽  
Zheng Fu ◽  
...  
Keyword(s):  
Lake Taihu ◽  
Eutrophic Lake ◽  
Holistic Understanding

Spatio‐temporal dynamics of water quality and eutrophication in Lake Taihu, China

Ecohydrology ◽  
2021 ◽  
Author(s):  
Qiongfang Li ◽  
Yuting Zhu ◽  
Qihui Chen ◽  
Yu Li ◽  
Jing Chen ◽  
...  
Keyword(s):  
Water Quality ◽  
Temporal Dynamics ◽  
Lake Taihu ◽  
Spatio Temporal
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