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장막기의 강우가 낙동강 하류 ( 물금 ) 수질에 미치는 영향
박성배(Sung Bae Park),이상균(Sang Kyun Lee),장광현(Kwang Hyeon Chang),정광석(Kwang Suek Jeong),주기재(Gea Jae Joo) 한국하천호수학회 2002 생태와 환경 Vol.35 No.3
The impact of summer monsoon on water quality of the lower Nakdong River was evaluated during the summer(June∼August) in 1997. Several limnological variables were measured in the interval of 1∼3 day using an automatic monitoring system(Hydrolab Recorder^TM) to detect water quality changes caused by rainfall on one-hour basis. During the monsoon period(from late June to mid July), 5 times of major rainfall events of >50㎜ were recorded in the river basin. Dynamic changes of water quality were observed during the monsoon, and the first rainfall event(June 25∼27) had a significant influence on the water quality at the lower part of the river. All parameters were largely changed due to the first rain event, and the changed level was maintained until the end of monsoon period. Nutrient concentrations and turbidity increased and values of the other parameters were declined as a result of water dilution. This rainfall event, Changma, is a meteorological phenomenon caused by the East-Asian monsoon climate. The magnitude and frequency of the rainfall during the early monsoon play an important role in change of water quality and ecosystem characteristics of large river system.
ScienceON
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