Assessment of the impacts of constructing artificial structures on the water quality and hydrological environment of a meandering river

被引:0
作者
Kwon, Yongju [1 ]
Kim, Jongyeong [1 ]
Choi, Joowon [1 ]
Kim, Taeyang [1 ]
Cha, Sung Min [2 ]
Kwon, Soonchul [1 ]
机构
[1] Pusan Natl Univ, 2 Busandaehak Ro 63Beon Gil, Busan 46241, South Korea
[2] Green Land & Water Res Inst, Busan, South Korea
关键词
artificial weir; hydrological environment; self-organizing map; water quality changes; YEONGSAN RIVER; MANAGEMENT; WEIRS; RESERVOIR; WETLANDS; DAMS;
D O I
10.1002/wer.11120
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
When an artificial structure is built in a river, the river changes significantly in water quality and hydraulic properties. In this study, the effects of the weirs constructed in the middle section of a river as a four major rivers restoration project in Korea on water quality and hydrological characteristics were analyzed. For multi-dimensional data analysis, a self-organizing map was applied, and statistical techniques including analysis of variation were used. As a result of analysis, the cross-sectional area of the river increased significantly after the construction of the weir compared to before the construction of the weir, and the flow velocity decreased at a statistically significant level. In the case of water quality, nitrogen, phosphorus, and suspended solids tended to improve after weir construction, and chlorophyll-a and bacteria tended to deteriorate. Some water quality parameters such as chlorophyll-a were also affected by seasonal influences. In order to improve the water quality deteriorated by the construction of the weir, it is necessary to consider how to improve the flow velocity of the river through partial opening or operation of the weir. In addition, in order to determine the effect of sedimentation of particulate matter due to the decrease in flow rate, it is necessary to conduct investigations on sediments around weirs in the future.
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页数:14
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