CAJ | 학술논문

为了从气象学角度揭示中小洪水的形成机理，将降雨与中小洪水结合起来展开分析。利用1981~2012年国家气象站逐日雨量和长江上游主要河段及干支流控制站日平均流量资料，结合三峡水库调度运行特征，采用自定义条件筛选出了长江上游中小洪水过程，并从中小洪水的分布特征、雨洪特征两方面进行研究。结果表明：自定义筛选条件合理可行；中小洪水呈逐渐减少的趋势；洪水主要集中在6~9月的汛期，三峡水库消落期无中小洪水出现；6个流域(区间)6月中小洪水过程平均面雨量自西向东增加。
위료종기상학각도게시중소홍수적형성궤리，장강우여중소홍수결합기래전개분석。이용1981~2012년국가기상참축일우량화장강상유주요하단급간지류공제참일평균류량자료，결합삼협수고조도운행특정，채용자정의조건사선출료장강상유중소홍수과정，병종중소홍수적분포특정、우홍특정량방면진행연구。결과표명：자정의사선조건합리가행；중소홍수정축점감소적추세；홍수주요집중재6~9월적신기，삼협수고소락기무중소홍수출현；6개류역(구간)6월중소홍수과정평균면우량자서향동증가。
To disclose the formation mechanism of small-medium rainfall flood from the perspective of synoptic meteorology, the two are combined in the analysis. Based on the daily rainfall data of meteorological stations and daily-mean-discharge data of the main control stations on the mainstream and tributaries of the Yangtze River from 1981 to 2012, by consideration of the Three Gorges Reservoir operation, we selected the small-medium floods in the upper Yangtze River by self-defined conditions. The analysis of the distributuion of small-medium flood and rainfall flood characteristics shows that the self-defined conditions are reasonable;the medium and small floods decreased gradually;the floods are in June to September mostly and no flood occurs in level fall period of Three Gorges Reservoir;the areal rainfall of middle and small floods in the six major river basins ( regions) in June increase are from the west to the east.