Attribution of lake eutrophication risk to anthropogenic forcing adjacent to the agriculture areas: a case study of Chagan Lake

Ge, Yuhao; Liu, Xuemei; Chen, Liwen; Zhang, Guangxin; Wu, Yanfeng; Yang, Xu; Yang, Jingshuang

doi:10.1007/s11356-023-30110-w

Cited by 6 publications

(3 citation statements)

References 57 publications

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“…Dianchi is a typical large shallow plateau lake and is one of the most eutrophic lakes in China. In addition, Dianchi is representative of typical lakes that cannot better control eutrophication through the reduction of external nutrient inputs [10]. The natural water exchange of Dianchi takes up to four years, which provides favorable natural conditions for nutrient retention and lake management.…”

Section: Introductionmentioning

confidence: 99%

Effects of Dredging on Nitrogen and Phosphorus Storage Patterns and Retention Mechanisms in Column Core Sediments in the Caohai Region of Dianchi Lake

Liu,

Yang,

Shao

et al. 2024

Water

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Dredging is a common technique for managing eutrophication problems in waters, reducing the accumulation of pollutants by removing sediments from the bottom of water bodies. However, dredging can have complex impacts on lake ecosystems, and it is crucial to understand its benefits and mechanisms for the environment. In this paper, the dredged and undredged areas in the Caohai portion of Dianchi Lake were studied to analyze the effects of dredging on nitrogen–phosphorus transport and conversion and changes in nitrogen–phosphorus morphology content and its mechanisms by comparing the nitrogen–phosphorus morphology content and percentage, the nitrogen–phosphorus ratio, and the release contribution of the two areas. It was found that the ratio of stabilized nitrogen (SN) to stabilized phosphorus (SP) in the dredged area was lower than that in the undredged area and the BD-P and TOC content had a large turnaround at the 16–20 cm position of the sediment in the dredged area. The main conclusions were that the dredging would disrupt the internal equilibrium of the lake system for many years, with the greatest effect on the balance of the BD-P in the phosphorus forms of the sediment, and that the column cores of the dredged area at 0 to 16 cm might be newly accumulated sediments after the dredging project. However, with time, the distribution of nitrogen and phosphorus forms in the newly accumulated sediments will gradually reach a new equilibrium. In addition, dredging will also cause significant changes in the retention efficiency of nitrogen and phosphorus in the sediment, and the stable nitrogen and phosphorus forms will be released and transformed into unstable nitrogen and phosphorus forms.

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Section: Introductionmentioning

confidence: 99%

Effects of Dredging on Nitrogen and Phosphorus Storage Patterns and Retention Mechanisms in Column Core Sediments in the Caohai Region of Dianchi Lake

Liu,

Yang,

Shao

et al. 2024

Water

View full text Add to dashboard Cite

show abstract

“…Dianchi is a typical large shallow plateau lake and is one of the most eutrophic lakes in China [11]. In addition, Dianchi is representative of typical lakes that cannot better control eutrophication through the reduction of external nutrient inputs [12]. The natural water exchange time of Dianchi is up to four years, which provides natural favorable conditions for nutrient retention and lake management.…”

Section: Introductionmentioning

confidence: 99%

Effects of Dredging on Nitrogen and Phosphorus Storage Pat-Terns and Retention Mechanisms in Column Core Sediments in the Caohai Region of Dianchi Lake

Liu,

Yang,

Shao

et al. 2024

Preprint

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Dredging is a common technique for managing eutrophication problems in waters, reducing the accumulation of pollutants by removing sediments from the bottom of water bodies. However, dredging can cause complex impacts on lake ecosystems, and it is crucial to understand benefits and mechanisms for environments. In this paper, the dredged and undredged areas in the Caohai portion of Dianchi Lake were studied to analyze the effects of dredging on nitrogen-phosphorus transport and conversion and changes in nitrogen-phosphorus morphology content and its mechanisms by comparing the nitrogen-phosphorus morphology content, percentage; nitro-gen-phosphorus ratio, and release contribution of the two areas. It was found that the ratio of sta-bilized nitrogen (SN) to stabilized phosphorus (SP) in the dredged area was lower than that in the non-dredged area; the BD-P and TOC contents had a large turnaround at the 16-20 cm position of the sediment in the dredged area; and the main conclusions were that the dredging would disrupt the internal equilibrium of the lake system for many years, and in particular, it would have the greatest effect on the balance of the BD-P in the phosphorus forms of the sediment, and that the column cores of the dredged area from 0 to 16 cm might be newly accumulated sediments after the dredging project. However, with time, the distribution of nitrogen and phosphorus forms in the newly accumulated sediments will gradually reach a new equilibrium. In addition, dredging will also cause significant changes in the retention efficiency of nitrogen and phosphorus in the sediment, and the stable nitrogen and phosphorus forms will be released and transformed into unstable ni-trogen and phosphorus forms.

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“…Carlson's TSI assumes algal biomass as the basis for classifying trophic states and is calculated considering aquatic ecological characteristics such as chlorophyll-a (Chl-a) concentrations, total phosphorus (TP), and Secchi depth transparency (SDT) [13]. Aizaki modified Carlson's TSI to better fit domestic conditions, proposing a modified TSI (TSIm) [14], while Yang and Dickman proposed the lake TSI (LTSI) [15]. These evaluation indicators were developed mainly for natural lakes and may not be suitable in regions such as the Republic of Korea, where most water bodies are artificial.…”

Section: Introductionmentioning

confidence: 99%

The Spatiotemporal Eutrophication Status and Trends in the Paldang Reservoir, Republic of Korea

Cho,

Kang,

Son

et al. 2023

Sustainability

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The Paldang Reservoir (PDR), the largest artificial lake in the Republic of Korea, has recently experienced increased chemical oxygen demand (COD), eutrophication, and algal blooms due to climate change. This study aimed to analyze the hydrological characteristics and water quality of the PDR and assess its spatial and seasonal eutrophication status changes using the Korean-type trophic quality index (TSIKO) and the seasonal Mann–Kendall Test (SMK). The PDR’s water was graded “good” in terms of biochemical oxygen demand (BOD) and “fair” for COD, total phosphorous (TP), and chlorophyll-a (Chl-a), according to Korean water quality standards. COD and Chl-a had a significant positive monotonic relationship. According to the TSIKO calculations, the trophic state of the PDR was mesotrophic, but eutrophic during the summer season. TSIKO (Chl-a) in summer tended to increase with a slope value of 0.22 mg/m3/year. The main causes of eutrophication in the PDR were proposed to be TP and phytoplankton overgrowth. Therefore, lake and reservoir functions need to be assessed, and solutions that can effectively protect them from excessive eutrophication to ensure sustainable clean water use and protect freshwater ecosystems need to be found.

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Attribution of lake eutrophication risk to anthropogenic forcing adjacent to the agriculture areas: a case study of Chagan Lake

Cited by 6 publications

References 57 publications

Effects of Dredging on Nitrogen and Phosphorus Storage Patterns and Retention Mechanisms in Column Core Sediments in the Caohai Region of Dianchi Lake

Effects of Dredging on Nitrogen and Phosphorus Storage Patterns and Retention Mechanisms in Column Core Sediments in the Caohai Region of Dianchi Lake

Effects of Dredging on Nitrogen and Phosphorus Storage Pat-Terns and Retention Mechanisms in Column Core Sediments in the Caohai Region of Dianchi Lake

The Spatiotemporal Eutrophication Status and Trends in the Paldang Reservoir, Republic of Korea

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