A study on the phytoplankton community structure in the Diaohe River section of the Middle Route of the South-to-North Water Diversion Project in winter

Xu, Yi; Ji, Liang; Lin, Jingfang; Lei, Xiaohui; Ding, Gongbo; Yuan, Rongxiao

doi:10.2166/ws.2020.247

Cited by 13 publications

(3 citation statements)

References 14 publications

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“…In 2016, the main canal had the phenomenon of prophetic algae aging, falling off, and floating up. The accumulated algae deposited 3-5 m at the inlet of the backflow gate, bringing certain risks to the operation and water supply safety of the project [28][29][30]. (3) Economic benefits.…”

Section: Profile Of the Target Research Areasmentioning

confidence: 99%

Comprehensive Benefit Assessment of the Middle Route of South-to-North Water Diversion Project Based on Markowitz Theory

Long,

Qu,

Zhao

et al. 2023

Water

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In the context of global climate change and the water-carbon peak target, improving water security in arid regions is a persistent challenge in global water resources management. Water diversion projects can serve as an important measure to effectively alleviate the uneven distribution of water resources, achieve rational allocation and efficient utilization of water resources. However, how to achieve the maximization of comprehensive benefits during the process of water allocation is also an urgent problem that needs to be solved. This study focuses on the Middle Route Project of the South to North Water Diversion Project in China, selecting four important municipalities and provinces during 2015 to 2021, namely Beijing, Tianjin, Hebei Province, and Henan Province, based on the actual benefits of the water receiving areas of the middle line project. Nine representative indicators related to social, economic, and ecological benefits were selected to evaluate the optimal combination of water resource allocation in the water receiving areas along the central line, in order to achieve the maximum comprehensive benefits and solve the problems of high water safety guarantee requirements and difficult balanced water distribution in urban agglomerations in the water receiving areas. Through the calculation of the Markovsky theoretical model, the results show that when 79.9% of the water conveyance is used to generate social benefits, 15.8% of the water conveyance is used to generate ecological benefits, and 4.5% of the water conveyance is used to generate economic benefits, the project achieves the maximum comprehensive benefits. This computational model method can be used to provide technical support and scientific reference for the optimal allocation of water resources in cross regional water transfer projects.

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Section: Profile Of the Target Research Areasmentioning

confidence: 99%

Comprehensive Benefit Assessment of the Middle Route of South-to-North Water Diversion Project Based on Markowitz Theory

Long,

Qu,

Zhao

et al. 2023

Water

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“…Changes in hydrodynamic conditions also affect algal density (Zhu et al, 2019). In addition, (Xu, et al, 2021;Long, et al, 2022), have also mentioned the algae problems in Middle Route of South-to-North Water Diversion Project.…”

Section: Cause Of Siltationmentioning

confidence: 99%

Online monitoring and sampling analysis of siltation in the middle route of the south-to-north water diversion project

Zhang

Han²,

Zhou³

et al. 2022

Front. Environ. Sci.

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The middle route project (MRP) of the South to North Water Diversion Project is a significant infrastructure and alleviating water scarcity in Northern China. MRP suffered from untraditional siltation problems. Obvious siltation occurred in the regulating reservoir at the end of the channel and some locations with weak hydrodynamic conditions in the channel when the mineral siltation concentration in the flow is very low. To study the characteristics of the siltation and the siltation time period, an IoT based automatic siltation monitoring system using cloud was installed at the outlet of the inverted siphon project on Xiao River. Three years of online monitoring data since 2018 and the siltation samples at five sites for particle size analysis were collected. The monitoring data shows that siltation mainly occurs during March to October, and almost no siltation occurs in winter. The maximum siltation speed can reach 390 mm per day. The particle size of the siltation gradually increases from upstream to downstream, which mainly occurs in the range above 100 m. The organic matter contained in the siltation shows a significant increase from 40.3 to 86.4% at upstream and downstream sampling position, respectively. Monitoring results shows the main body of the siltation in the MRP is not the traditional siltation but the remnants of the algae that proliferate in large numbers. During March to October, the temperature is suitable for the proliferation of algae which attaches to the sediment particles and gradually grows downstream with the flow.

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“…Water diversion projects are playing an increasingly important role in improving the water quality of rivers. However, water transfers will also affect the concentration of nutrients and other physicochemical variables, which will have a certain impact on the water environment, thereby affecting the diversity and community composition of phytoplankton (Yin et al, 2011;Dai et al, 2020;Xu et al, 2021;Yang et al, 2021). At the same time, the short-period hydrological conditions brought by the water diversion project have also shaped the community composition of biofilms to a certain extent (Guo et al, 2020).…”

Section: Environmental Factors Driving the Variation Of Microeukaryot...mentioning

confidence: 99%

Microeukaryotic Community Shifting Along a Lentic-Lotic Continuum

Wang

Ren

et al. 2022

Front. Ecol. Evol.

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As an important regulator of ecosystem functions in river systems, microeukaryotes play an important role in energy and material conversion, yet little is known about the shift along a lentic-lotic continuum. In this study, the 18S rRNA genes sequencing was used to identify the microeukaryotic communities at 82 sites along a lentic-lotic continuum with the aim of understanding the impact of upstream inlet river on microeukaryotic communities in Baiyang Lake (BYD) and its downstream. Our results showed that the upstream inlet river affected the diversity and community composition of microeukaryotes in BYD and downstream rivers, and environmental variables greatly affected the composition of microeukaryotic community. The community composition in BYD had lower variabilities. Co-occurrence network analysis revealed that the network was non-random and clearly parsed into three modules, and different modules were relatively more abundant to a particular area. As keystone taxa, some nodes of the upstream microeukaryotic network played an important role in structuring network and maintaining the stability of the ecosystem. In BYD and downstream, the microeukaryotic network was highly fragmented, and the loss of keystone taxa would have an adverse impact on the integrity and function of the microeukaryotic community. Microeukaryotes had strong tendencies to co-occur, which may contribute to the stability and resilience of microeukaryotic communities. Overall, these findings extend the current understanding of the diversity and community composition of microeukaryotic along a lentic-lotic continuum.

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A study on the phytoplankton community structure in the Diaohe River section of the Middle Route of the South-to-North Water Diversion Project in winter

Cited by 13 publications

References 14 publications

Comprehensive Benefit Assessment of the Middle Route of South-to-North Water Diversion Project Based on Markowitz Theory

Comprehensive Benefit Assessment of the Middle Route of South-to-North Water Diversion Project Based on Markowitz Theory

Online monitoring and sampling analysis of siltation in the middle route of the south-to-north water diversion project

Microeukaryotic Community Shifting Along a Lentic-Lotic Continuum

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