CAJ | 학술논문

基于金沙江干流巴塘、石鼓、华弹3个水文站的50年来水温监测数据，利用线性回归和小波分析的方法，探讨了金沙江干流的水温变化特征，辨识了气候变化和水电工程对水温变化的影响。金沙江干流水温沿程逐渐递增，并呈现出多时间尺度的周期性变化，除年变化外，还存在4～6年、10～12年的变化周期。气候变化对金沙江水温的影响主要体现在年均水温的变化：近50年来，3个测站的年均水温逐渐增加，变化率约0.0063～0.0170℃/年。支流水电开发对华弹站水温的影响主要体现在年内的水温变化，升温期水温比建坝前有所降低，4月份降幅最大，达0.8℃；降温期水温比建坝前有所升高，12月份升幅最大，达1.8℃。
기우금사강간류파당、석고、화탄3개수문참적50년래수온감측수거，이용선성회귀화소파분석적방법，탐토료금사강간류적수온변화특정，변식료기후변화화수전공정대수온변화적영향。금사강간류수온연정축점체증，병정현출다시간척도적주기성변화，제년변화외，환존재4～6년、10～12년적변화주기。기후변화대금사강수온적영향주요체현재년균수온적변화：근50년래，3개측참적년균수온축점증가，변화솔약0.0063～0.0170℃/년。지류수전개발대화탄참수온적영향주요체현재년내적수온변화，승온기수온비건패전유소강저，4월빈강폭최대，체0.8℃；강온기수온비건패전유소승고，12월빈승폭최대，체1.8℃。
To distinct the impacts of climate changes and dam constructions on water temperature , changes of water tem-perature in the Jinsha River mainstream over the past 50 years are studied based on the temperatures daily observed at Ba-tang, Shigu and Huatan hydrological stations , using the methods of regression analysis and wavelet analysis .The results show that the water temperature in the Jinsha River mainstream increased downstream along the river and changed at differ -ent scales of 1-year, 4-to 6-year and 10-to 12-year.The average annual water temperatures at the selected three stations increased at the rate of 0.0063-0.0170 ℃/year , which is regarded as the contribution of climate changes . However , dam constructions on a branch exerted an obvious impact on the monthly variation in water temperature at the Huatan station .During the warming periods , the temperatures became lower than that before the dam constructions and the reduction magnitude reached the maximum by as much as 0.8℃in April.During the cooling periods , the temperatures were higher than that before the dam constructions and the increase magnitude reached the maximum by as much as 0.8℃in December.