| 论文标题： | |
|---|---|
| 作者： | |
| 出版刊物： | |
| 出版日期： | |
| 出版年份： | |
| 卷/期： | |
| DOI： | |
| 论文摘要： | In water delivery canals, aging periphytic algae can detach extensively, causing severe clogging and water quality deterioration. However, current research lacks a clear understanding of the hydraulic threshold for periphytic algal detachment. To fulfill this gap, two hydraulic scouring experiments of varying durations were conducted to investigate the effects of water velocity on periphytic algae growing on concrete substrates, and a new algal dynamic model considering detachment threshold and diminishing returns (DDR model) was proposed. Results revealed that water velocity significantly influenced periphytic algal biomass and community composition, identifying a critical value for algal detachment and diminishing returns in scouring effects. The DDR model used water velocity as the independent variable and demonstrated high simulation accuracy for both short-term and long-term algal biomass (the coefficient of determination (R-2) > 0.72, Relative Root Mean Square Error (RRMSE) < 0.199). Compared to existing models, the DDR increased R-2 by up to 67.42 % and reduced RRMSE to 57.92 %. The calibration results indicated that the water velocity threshold depended on the periphytic community. The threshold for Bacillariophyta-rich communities was higher (0.60 m s(-1)), while for Cyanobacteria-rich communities, it was lower (0.12 m s(-1)). It was concluded that including both the scouring threshold and the diminishing returns in the periphytic algal dynamic model was essential for accurately simulating detached algal biomass. These findings provide valuable insights into the regulation and management of periphytic detachment. |
以下内容与「星空体育彩票官网玩法说明」同属公开资讯，可按栏目接着查阅相关条目。
本站按公开材料组织页面。需要原文时请核对应栏目发布页。
若从搜索引擎进入，可先确认当前栏目名称，再按需打开相关阅读。
