scholarly journals Design and practice of a platform for monitoring, early-warning and simulation of algal blooms in Lake Chaohu

2022 ◽  
Vol 34 (1) ◽  
pp. 38-48
Author(s):  
Qiu Yinguo ◽  
◽  
Duan Hongtao ◽  
Wan Nengsheng ◽  
Gao Rui ◽  
...  
Keyword(s):  
Early Warning ◽  
Algal Blooms ◽  
Lake Chaohu ◽  
Design And Practice

Algal blooms in the middle and lower Han River: Characteristics, early warning and prevention

2020 ◽  
Vol 706 ◽  
pp. 135293 ◽  
Author(s):  
Xiaokang Xin ◽  
Hong Zhang ◽  
Pei Lei ◽  
Wenzhong Tang ◽  
Wei Yin ◽  
...  
Keyword(s):  
Early Warning ◽  
Algal Blooms ◽  
Han River

scholarly journals Temporal and spatial distribution of algal blooms in Lake Chaohu, 2000-2015

2017 ◽  
Vol 29 (2) ◽  
pp. 276-284 ◽  
Author(s):  
TANG Xiaoxian ◽  
◽  
SHEN Ming ◽  
DUAN Hongtao
Keyword(s):  
Spatial Distribution ◽  
Algal Blooms ◽  
Lake Chaohu ◽  
Temporal And Spatial Distribution ◽  
Temporal And Spatial

When and where to reduce nutrient for controlling harmful algal blooms in large eutrophic lake Chaohu, China?

2018 ◽  
Vol 89 ◽  
pp. 808-817 ◽  
Author(s):  
Jiacong Huang ◽  
Yinjun Zhang ◽  
Qi Huang ◽  
Junfeng Gao
Keyword(s):  
Harmful Algal Blooms ◽  
Algal Blooms ◽  
Eutrophic Lake ◽  
Lake Chaohu

scholarly journals A Fuzzy Logic Model for Early Warning of Algal Blooms in a Tidal-Influenced River

Water ◽  
2021 ◽  
Vol 13 (21) ◽  
pp. 3118
Author(s):  
Hanjie Yang ◽  
Zhaoting Chen ◽  
Yingxin Ye ◽  
Gang Chen ◽  
Fantang Zeng ◽  
...  
Keyword(s):  
Fuzzy Logic ◽  
Dissolved Oxygen ◽  
Early Warning ◽  
Algal Blooms ◽  
Water Mass ◽  
Warning System ◽  
Early Warning Systems ◽  
Logic Model ◽  
Warning Systems ◽  
Fuzzy Logic Model

Algal blooms are one of the most serious threats to water resources, and their early detection remains a challenge in eutrophication management worldwide. In recent years, with more widely available real-time auto-monitoring data and the advancement of computational capabilities, fuzzy logic has become a robust tool to establish early warning systems. In this study, a framework for an early warning system was constructed, aiming to accurately predict algae blooms in a river containing several water conservation areas and in which the operation of two tidal sluices has altered the tidal currents. Statistical analysis of sampled data was first conducted and suggested the utilization of dissolved oxygen, velocity, ammonia nitrogen, total phosphorus, and water temperature as inputs into the fuzzy logic model. The fuzzy logic model, which was driven by biochemical data sampled by two auto-monitoring sites and numerically simulated velocity, successfully reproduced algae bloom events over the past several years (i.e., 2011, 2012, 2013, 2017, and 2019). Considering the demands of management, several key parameters, such as onset threshold and prolongation time and subsequent threshold, were additionally applied in the warning system, which achieved a critical success index and positive hit rate values of 0.5 and 0.9, respectively. The differences in the early warning index between the two auto-monitoring sites were further illustrated in terms of tidal influence, sluice operation, and the influence of the contaminated water mass that returned from downstream during flood tides. It is highlighted that for typical tidal rivers in urban areas of South China with sufficient nutrient supply and warm temperature, dissolved oxygen and velocity are key factors for driving early warning systems. The study also suggests that some additional common pollutants should be sampled and utilized for further analysis of water mass extents and data quality control of auto-monitoring sampling.

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