scholarly journals Environmental characteristics of sediment-water interface of phytoplankton and macrophyte dominated zones in Lake Taihu

2013 ◽  
Vol 25 (2) ◽  
pp. 199-208 ◽  
Author(s):  
WANG Yongping ◽  
◽  
ZHU Guangwei ◽  
HONG Dalin ◽  
QIN Boqiang
Keyword(s):  
Lake Taihu ◽  
Water Interface ◽  
Environmental Characteristics

Dredging method effects on sediment resuspension and nutrient release across the sediment-water interface in Lake Taihu, China

2019 ◽  
Vol 27 (21) ◽  
pp. 25861-25869 ◽  
Author(s):  
Chao Chen ◽  
Ming Kong ◽  
Yi-Yao Wang ◽  
Qiu-Shi Shen ◽  
Ji-Cheng Zhong ◽  
...  
Keyword(s):  
Lake Taihu ◽  
Sediment Resuspension ◽  
Nutrient Release ◽  
Water Interface ◽  
Method Effects

Phosphite flux at the sediment–water interface in northern Lake Taihu

2016 ◽  
Vol 543 ◽  
pp. 67-74 ◽  
Author(s):  
Huimin Qiu ◽  
Jinju Geng ◽  
Hongqiang Ren ◽  
Zhaoyi Xu
Keyword(s):  
Lake Taihu ◽  
Water Interface

Evaluation of in situ simulated dredging to reduce internal nitrogen flux across the sediment-water interface in Lake Taihu, China

2016 ◽  
Vol 214 ◽  
pp. 866-877 ◽  
Author(s):  
Juhua Yu ◽  
Chengxin Fan ◽  
Jicheng Zhong ◽  
Yinlong Zhang ◽  
Changhui Wang ◽  
...  
Keyword(s):  
Lake Taihu ◽  
Water Interface ◽  
Nitrogen Flux

224Ra/228Th disequilibrium in sediments of Lake Taihu: Implications of nitrogen fluxes across the sediment–water interface

2020 ◽  
Author(s):  
Xiaoyan shi ◽  
Xin luo ◽  
Jimmy.Jiu jiao ◽  
Jing huang ◽  
Meiqing lu ◽  
...  
Keyword(s):  
Lake Sediments ◽  
Molecular Diffusion ◽  
Lake Taihu ◽  
Inorganic Nitrogen ◽  
Eastern China ◽  
Water Remediation ◽  
Water Interface ◽  
Benthic Fluxes ◽  
Eutrophic Lakes ◽  
Nitrogen Fluxes

<p>Radium-224 /Thorium-228 (<sup>224</sup>Ra/<sup>228</sup>Th) disequilibrium in sediments is an advanced proxy of benthic processes and has been gradually used to quantify the fluxes and solute transfer across the sediment–water interface (SWI). This study makes the first attempt to explore the nitrogen fluxes across the SWI of Lake Taihu, the third largest and highly eutrophic freshwater lake in eastern China, based on the plumbing of <sup>224</sup>Ra/<sup>228</sup>Th disequilibrium in the lake sediments. The microscopic sediment cores (0-20 cm) were collected in different parts of the lake, and exchangeable <sup>224</sup>Ra and <sup>228</sup>Th in bulk sediments were measured. Dissolved inorganic nitrogen (DIN) in pore water and overlying lake water were also analyzed. Deficits of <sup>224</sup>Ra compared to its parent isotopes <sup>228</sup>Th were observed in the lake sediments, suggesting the influences of mixing processes. The deficits were relatively significant in the western and northern parts, which are consistent with the relative high-eutrophicated areas of the lake. One-dimensional (1D) radium-thorium diagenetic model in the sediment was used to estimate the benthic fluxes based on the <sup>224</sup>Ra deficits. Results show that the benthic fluxes of <sup>224</sup>Ra varied from -0.428 to 1.170 dpm cm<sup>-2</sup> d<sup>-1</sup>, and the bio-irrigation and molecular diffusion are considered to be the major factors. Specifically, in the severely eutrophicated area of the lake, the bio-irrigation predominates in benthic fluxes, reaching up to 97.1% of the deficit of <sup>224</sup>Ra. The DIN benthic fluxes were also quantified, leading to a flux estimation of 3.41 mol m<sup>-2</sup> d<sup>-1</sup>, which exceeds riverine input (2.63 mol m<sup>-2</sup> d<sup>-1</sup>) and the loading derived from lacustrine groundwater discharge (0.02~0.03 mol m<sup>-2</sup> d<sup>-1</sup>). This study reveals that sediment processes could be the vital factors for the lake nutrient loadings, and highly contribute to the lake eutrophication. This study is constructive for the water remediation and ecosystem restoration in Lake Taihu and other large eutrophic lakes elsewhere.</p>

Influence of algal bloom degradation on nutrient release at the sediment–water interface in Lake Taihu, China

2012 ◽  
Vol 20 (3) ◽  
pp. 1803-1811 ◽  
Author(s):  
Mengyuan Zhu ◽  
Guangwei Zhu ◽  
Linlin Zhao ◽  
Xin Yao ◽  
Yunlin Zhang ◽  
...  
Keyword(s):  
Algal Bloom ◽  
Lake Taihu ◽  
Nutrient Release ◽  
Water Interface

scholarly journals Denitrification and anammox on the sediment-water interface in the Meiliang Bay of Lake Taihu

2009 ◽  
Vol 21 (6) ◽  
pp. 775-781 ◽  
Author(s):  
XU Hui ◽  
◽  
ZHANG Lu ◽  
SHANG Jingge ◽  
DAI Jingyu ◽  
...  
Keyword(s):  
Lake Taihu ◽  
Water Interface ◽  
Meiliang Bay

scholarly journals Effects of Dredging Season on Sediment Properties and Nutrient Fluxes across the Sediment–Water Interface in Meiliang Bay of Lake Taihu, China

Water ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1606 ◽  
Author(s):  
Ji-Cheng Zhong ◽  
Ju-Hua Yu ◽  
Xiao-Lan Zheng ◽  
Shuai-Long Wen ◽  
De-Hong Liu ◽  
...  
Keyword(s):  
Taihu Lake ◽  
Lake Taihu ◽  
Soluble Reactive Phosphorus ◽  
Internal Loading ◽  
Sediment Oxygen Demand ◽  
Nutrient Fluxes ◽  
Water Interface ◽  
Sediment Properties ◽  
N Fluxes ◽  
Meiliang Bay

The influence of dredging season on sediment properties and nutrient fluxes across the sediment–water interface remains unknown. This study collected sediment cores from two sites with different pollution levels in Meiliang Bay, Taihu Lake (China). The samples were used in simulation experiments designed to elucidated the effects of dredging on internal loading in different seasons. The results showed that dredging the upper 30 cm of sediment could effectively reduce the contents of organic matter, total nitrogen, and total phosphorus in the sediments. Total biological activity in the dredged sediment was weaker (p < 0.05) than in the undredged sediment in all seasons for both the Inner Bay and Outer Bay, but the effect of 30-cm dredging on sediment oxygen demand was negligible. Dredging had a significant controlling effect on phosphorus release in both the Inner Bay and Outer Bay, and soluble reactive phosphorus (SRP) fluxes from the dredged cores were generally lower (p < 0.05) than from the undredged cores. In contrast, NH4+-N fluxes from the dredged cores were significantly higher (p < 0.05) than from the undredged cores in all seasons for both sites, this indicates short-term risk of NH4+-N release after dredging, and this risk is greatest in seasons with higher temperatures, especially for the Inner Bay. Dredging had a limited effect on NO2−-N and NO3−-N fluxes at both sites. These results suggest that dredging could be a useful approach for decreasing internal loading in Taihu Lake, and that the seasons with low temperature (non-growing season) are suitable for performing dredging projects.

Sign in / Sign up

Export Citation Format

Share Document