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논문 기본 정보

자료유형
학술저널
저자정보
Nam-Do Lee (Land & Ocean Environmental ENG) Hyeon-Jeong You (Land & Ocean Environmental ENG) Chul-Hui Kwoun (Land & Ocean Environmental ENG) Sang-Woo Kim (Land & Ocean Environmental ENG)
저널정보
한국환경과학회 한국환경과학회지 한국환경과학회지 제33권 제11호
발행연도
2024.11
수록면
819 - 838 (20page)
DOI
10.5322/JESI.2024.33.11.819

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초록· 키워드

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We described the time-series and seasonal variations in water temperature and salinity in the Nakdong River estuary from 2016 to 2022 using field observations. In addition, we also utilized precipitation, air temperature and freshwater discharge data from the Korea Meteorological Administration's open meteorological data portal and MyWater from the Korea Water Resources Corporation. The relationship between freshwater discharge, precipitation, and salinity at the observation stations near the floodgates showed a stronger correlation in the Nakdong River mainstream compared to the Seonakdong River. Salinity concentrations near the western floodgates of the mainstream showed a strong correlation with freshwater discharge, indicating that salinity decreased as freshwater discharge increased, unlike the pattern observed at the other floodgates. Seasonal variations in the Nakdong estuary had a substantially impacted both water temperature and salinity. During the spring and summer flood seasons, water temperatures increased, while the increase in freshwater discharge from floodgate openings reduced salinity concentrations. However, during the autumn and winter dry seasons, water temperatures decreased, and the reduction in freshwater discharge, along with the inflow of high-salinity water from the open sea, led to relatively higher salinity concentrations. The salinity concentrations near the floodgates of the Nakdong River mainstream were lower compared to those in the Seonakdong River, where stagnant water was caused by the closed floodgates. The eastern region of the Nakdong River mainstream showed relatively higher salinity concentrations than the western region due to the influence of high-salinity water inflowing from the open sea as a result of the regular floodgate openings. The spatial distribution of salinity showed low concentrations near the floodgates and around sandbars during the flood season, while high salinity concentrations were observed in coastal areas. In particular, a strong haline front formed near the sandbar during this period, although its structure weakened in the autumn and winter.

목차

Abstract
1. Introduction
2. Materials and Methods
3. Results and Discussion
4. Conclusions
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