Experimental study on total dissolved gas supersaturation in water

More and more high dams have been constructed and operated in China. The total dissolved gas (TDG) supersaturation caused by dam discharge leads to gas bubble disease or even death of fish. Through a series of experiments, the conditions and requirements of supersaturated TDG generation were examine...

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Main Authors: Lu Qu, Ran Li, Jia Li, Ke-feng Li, Lin Wang
Format: Article
Language:English
Published: Elsevier 2011-12-01
Series:Water Science and Engineering
Subjects:
Online Access:http://www.sciencedirect.com/science/article/pii/S167423701530171X
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author Lu Qu
Ran Li
Jia Li
Ke-feng Li
Lin Wang
author_facet Lu Qu
Ran Li
Jia Li
Ke-feng Li
Lin Wang
author_sort Lu Qu
collection DOAJ
description More and more high dams have been constructed and operated in China. The total dissolved gas (TDG) supersaturation caused by dam discharge leads to gas bubble disease or even death of fish. Through a series of experiments, the conditions and requirements of supersaturated TDG generation were examined in this study. The results show that pressure (water depth), aeration, and bubble dissolution time are required for supersaturated TDG generation, and the air-water contact area and turbulence intensity are the main factors that affect the generation rate of supersaturated TDG. The TDG supersaturation levels can be reduced by discharging water to shallow shoals downstream of the dam or using negative pressure pipelines. Furthermore, the TDG supersaturation levels in stilling basins have no direct relationship with those in reservoirs. These results are of great importance for further research on the prediction of supersaturated TDG generation caused by dam discharge and aquatic protection.
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spelling doaj.art-3194baf60a914288afd9e195026f84162022-12-21T22:48:12ZengElsevierWater Science and Engineering1674-23702011-12-014439640410.3882/j.issn.1674-2370.2011.04.004Experimental study on total dissolved gas supersaturation in waterLu Qu0Ran Li1Jia Li2Ke-feng Li3Lin Wang4Zhejiang Institute of Hydraulics and Estuary, Hangzhou 310020, P. R. ChinaState Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, P. R. ChinaState Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, P. R. ChinaState Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, P. R. ChinaState Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, P. R. ChinaMore and more high dams have been constructed and operated in China. The total dissolved gas (TDG) supersaturation caused by dam discharge leads to gas bubble disease or even death of fish. Through a series of experiments, the conditions and requirements of supersaturated TDG generation were examined in this study. The results show that pressure (water depth), aeration, and bubble dissolution time are required for supersaturated TDG generation, and the air-water contact area and turbulence intensity are the main factors that affect the generation rate of supersaturated TDG. The TDG supersaturation levels can be reduced by discharging water to shallow shoals downstream of the dam or using negative pressure pipelines. Furthermore, the TDG supersaturation levels in stilling basins have no direct relationship with those in reservoirs. These results are of great importance for further research on the prediction of supersaturated TDG generation caused by dam discharge and aquatic protection.http://www.sciencedirect.com/science/article/pii/S167423701530171Xtotal dissolved gas supersaturationdissolved gas in waterexperimental studydam discharge
spellingShingle Lu Qu
Ran Li
Jia Li
Ke-feng Li
Lin Wang
Experimental study on total dissolved gas supersaturation in water
Water Science and Engineering
total dissolved gas supersaturation
dissolved gas in water
experimental study
dam discharge
title Experimental study on total dissolved gas supersaturation in water
title_full Experimental study on total dissolved gas supersaturation in water
title_fullStr Experimental study on total dissolved gas supersaturation in water
title_full_unstemmed Experimental study on total dissolved gas supersaturation in water
title_short Experimental study on total dissolved gas supersaturation in water
title_sort experimental study on total dissolved gas supersaturation in water
topic total dissolved gas supersaturation
dissolved gas in water
experimental study
dam discharge
url http://www.sciencedirect.com/science/article/pii/S167423701530171X
work_keys_str_mv AT luqu experimentalstudyontotaldissolvedgassupersaturationinwater
AT ranli experimentalstudyontotaldissolvedgassupersaturationinwater
AT jiali experimentalstudyontotaldissolvedgassupersaturationinwater
AT kefengli experimentalstudyontotaldissolvedgassupersaturationinwater
AT linwang experimentalstudyontotaldissolvedgassupersaturationinwater