Long-Term Variations in Water Quality and Sediment Characteristics in the Open Estuary of the Seomjin River and the Closed Estuary of the Yeongsan River

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This research aims to compare long-term variations in water quality and sediment characteristics between an open estuary and a closed estuary.
Utilized marine environment measurement data from 2015 to 2024
Applied generalized additive models (GAM) for long-term trend estimation
Assessed spatial changes based on significance levels of variations
Salinity decreased in both estuaries
COD and DIN increased overall, with a notable spike in Seomjin River
DIP showed a significant increase in Yeongsan River, while trends in Seomjin River were unclear
Chl-a exhibited a mild overall decline, but increases occurred after Typhoon in Seomjin River
SPM was higher and more variable in Yeongsan River compared to a stable lower concentration in Seomjin River

Analysis reveals water quality changes in open and closed estuaries, suggesting tailored management strategies.

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Lee et al. (2026) studied this question.

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