논문 상세보기
pp.1417-1430
In this study we were to explore the seasonal variation of water temperature distributions before and after weir construction at Gumi, Chilgok, Gangjung(Goryung), Dalsung in the Nakdong River using Landsat satellite images. Relationship between in-situ water temperature and radiance values of Landsat-5, 7, 8 satellite images showed high correlation. Seasonal variation of water temperature in Nakdong River showed that the fluctuation ranges of water temperature before weir construction were larger than those after weir construction. This indicated that the variation of water temperature is due to the difference of heat storage volume by weir construction and dredging work. In particular, the water temperature after weirs construction in autumn was 4-8 times lower than that before weirs construction. Water temperature after weir construction decreased in spring and summer at the downstream of Gumi weir and Gangjung(Goryung) weir, and the upstream of Dalsung weir. In autumn and winter, the water temperature after weir construction increased in the upstream and downstream of the whole weirs except upstream of Gumi weir. Relationship between water temperature and meteorological elements (air temperature, wind speed, sunshine, radiation) showed high correlation of above 94% in air temperature, and then radiation was high correlation before and after 65%.
1. 서 론
2. 자료 및 방법
2.1. 연구 해역
2.2. 현장관측 및 위성관측
3. 결과 및 고찰
3.1. 낙동강유역 보 주변 현장관측 수온의 계절변화
3.2. 위성자료를 이용한 계절별 표층 수온 추정 알고리즘
3.3. 낙동강유역 보 건설 전후 수온의 계절변화
3.4. 보의 상·하류 수온의 계절변화
3.5. 위성 추정 수온과 기상 요소와의 관계
4. 결 론
REFERENCE
