Enhancing the engineering design of diversion routes to safeguard water quality: New insights from a carbon cycling perspective

Hanlu Yan; Qiuwen Chen; Yuqing Lin; Jianyun Zhang; Tao Feng; Yuchen Chen; Cheng Chen; Zhiyuan Wang; Yunxia Zu; Shufeng He

doi:10.59717/j.xinn-geo.2024.100075

The Innovation Geoscience > 2024 Vol. 2 > No. 2 > 100075

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Enhancing the engineering design of diversion routes to safeguard water quality: New insights from a carbon cycling perspective

1.
Center for Eco-Environment Research, Nanjing Hydraulic Research Institute, Nanjing 210029, China
2.
The National Key Laboratory of Water Disaster Prevention, Nanjing Hydraulic Research Institute, Nanjing 210029, China
3.
Yangtze Institute for Conservation and Green Development, Nanjing 210098, China
4.
School of Environment, Nanjing University, Nanjing 210023, China

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Corresponding author: qwchen@nhri.cn
Received Date: November 13, 2023

Accepted Date: May 12, 2024

Published Online: May 17, 2024

The Innovation Geoscience 2(2), https://doi.org/10.59717/j.xinn-geo.2024.100075 | Cite this article

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1. Water diversion channel type and route layout markedly shape the assembly of aquatic microbial communities.
  
  Isolated and concrete channels lead to vulnerable bacterial community with reduced carbon metabolism ability.
  
  Emphasize algae-microbe interaction in water diversion channels to prevent detrital organic matter buildup.

ABSTRACT

ABSTRACT

Conserving the quality of transferred water ensures the success and sustainability of interbasin water diversion works, which are increasingly crucial for global water security. Despite intensive scientific and engineering efforts, carbon dynamics in these artificial rivers have been overlooked. The accumulation of organic mud in some water transfer canals, for example, in the Middle Route of the South-to-North Water Diversion (SNWT) in China, poses multifaceted risks, including jeopardized water quality, disrupted water supply, and surging mud removal expenses. In contrast, natural channels for water delivery, such as the parallel East Route of the SNWT, do not experience mud accumulation challenges. Our study reveals that the open concrete canal of the Middle Route, devoid of connections to local water bodies, compromises hydrological connectivity, contrasting with the East Route, which enhances it. This, in turn, undermines microbial stochastic assembly processes, impedes the introduction of habitat-generalist microbial species, and facilitates detrital carbon accumulation within the ecosystem, presumably due to constraints on bacterial community functions. These findings can improve future engineering designs of water transfer schemes, including water diversion approaches and channel construction, for preserving transferred water quality.
- water transfer /
- algal growth /
- organic matter /
- carbon cycling /
- engineering design.

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Yan H., Chen Q., Lin Y., et al., (2024). Enhancing the engineering design of diversion routes to safeguard water quality: New insights from a carbon cycling perspective. The Innovation Geoscience 2(2): 100075. https://doi.org/10.59717/j.xinn-geo.2024.100075

Yan H., Chen Q., Lin Y., et al., (2024). Enhancing the engineering design of diversion routes to safeguard water quality: New insights from a carbon cycling perspective. The Innovation Geoscience 2(2): 100075. https://doi.org/10.59717/j.xinn-geo.2024.100075

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