Large lake sluice operations during an extreme rainfall season greatly affect circulation and water quality dynamics of a shallow eutrophic lake

	Large lake sluice operations during an extreme rainfall season greatly affect circulation and water quality dynamics of a shallow eutrophic lake
	Peng, Zhaoliang; Zhang, Yihui; Zhu, Jinge; Hu, Weiping; Liu, Gang; Zhang, Hui; Gao, Rui
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2021
卷号	781
英文摘要	Large hydraulic infrastructures have been constructed globally to address water challenges. Past studies have well documented their effects on downstream aquatic ecosystems, which have included disrupting hydrological regimes as well as nutrient delivery, cycling and mediating processes that affect primary production. However, how these infrastructure operations affect lake ecosystems where the infrastructures are situated remains poorly understood. In the present study, we used a three-dimensional hydrodynamic-biogeochemical lake model to quantify the potential effects of large lake sluice operations under extreme high water levels on current structure and water quality parameters of Lake Chaohu in China. We designed and simulated multiple operation strategies based on actual operation curves during the 2016 extreme rainfall season. The model successfully captured the water quality dynamics of Lake Chaohu during both the calibration and validation phases. Our results indicate that higher lake water release rates led to overall accelerations of the current velocity: however, the deceleration of along-shore current velocity along the shorelines was also evident. Higher release rates also resulted in rapid rises ammonium nitrogen (NH4-N), total nitrogen (TN) and total phosphorous (IP) concentrations in the eastern lake basin, as well as a lake-wide rise of chlorophyll-a (Chla) concentration. When the lake sluice was operated at its full capacity, mean concentrations of these four parameters increased by 5.21%, 558%, 9.6% and 7.46%, respectively. Modeling results demonstrate that the effects of lake sluice operations were still quite pronounced for four months after the operations. Modeling results also revealed that higher release rate during the operation phase may help decease TN and TP concentrations during the subsequent period. This study provides a useful perspective on how to support the planning and operation of large infrastructures in the face of climate change induced extreme events. (C) 2021 Elsevier B.V. All rights reserved.
内容类型	期刊论文
源URL	[http://159.226.73.51/handle/332005/20442]
专题	中国科学院南京地理与湖泊研究所
推荐引用方式 GB/T 7714	Peng, Zhaoliang,Zhang, Yihui,Zhu, Jinge,et al. Large lake sluice operations during an extreme rainfall season greatly affect circulation and water quality dynamics of a shallow eutrophic lake[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2021,781.
APA	Peng, Zhaoliang.,Zhang, Yihui.,Zhu, Jinge.,Hu, Weiping.,Liu, Gang.,...&Gao, Rui.(2021).Large lake sluice operations during an extreme rainfall season greatly affect circulation and water quality dynamics of a shallow eutrophic lake.SCIENCE OF THE TOTAL ENVIRONMENT,781.
MLA	Peng, Zhaoliang,et al."Large lake sluice operations during an extreme rainfall season greatly affect circulation and water quality dynamics of a shallow eutrophic lake".SCIENCE OF THE TOTAL ENVIRONMENT 781(2021).