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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Format: | Article |
Language: | English |
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Elsevier
2011-12-01
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Series: | Water Science and Engineering |
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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. |
first_indexed | 2024-12-14T20:42:29Z |
format | Article |
id | doaj.art-3194baf60a914288afd9e195026f8416 |
institution | Directory Open Access Journal |
issn | 1674-2370 |
language | English |
last_indexed | 2024-12-14T20:42:29Z |
publishDate | 2011-12-01 |
publisher | Elsevier |
record_format | Article |
series | Water Science and Engineering |
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 |