경남지역 강우량의 분포 특성
Distribution characteristics of rainfall over Gyeongnam area
vi, 45, xxxiiip.
경남지역 강우량 건설공학 토목공학 수리공학;
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A Rainfall distribution is very complicates owing to topographic influence in Korea. Hence, the variations in the distribution of rainfall are required precise analysis in order to predict a flood control and secure a sufficient capacity of water. This study which has been conducted on 32 sites, classified into two climatologically homogeneous regions by cluster analysis for the annual rainfall series, analyzed the features of rainfall distribution regarding the annual and rainy rainfall series, in the Gyeongnam Area delivers as follows; 1. According to the rainfall statistical data for the two regions classified through cluster analysis, Region I(Gyeongnam's inland area) shows big fluctuation between November and February, on the other way, Region II(western mountain & southern coastal area) show it between March and September. It seems to be attributed to the difference of generation mechanism occurring these area. 2. The long-term fluctuation trend analysis for the rainfall series in Gyeongnam tends to be reduced more or less than the average value, getting shorter fluctuation period lately, it is considered to be caused by abnormal climate existing all over the world. In line with this result, we expect the increase of precipitation for further 6 to 9 years. 3. The tendency analysis didn't show a noted feature in terms of Gyeongnam's overall rainfall series, however, linear trends has about 1.6 or 2.1 times of (+) slope values compared to Region I and II. 4. The result of the analysis of the persistence of rainfall series by taking measure of lag-1 serial correlation and correlogram says Gyeongnam's rainfall series is random one despite showing short-term persistence. 5. The analysis of circulation and periodicity regarding to the annual and rainy rainfall sereis shows that there are QBO (quasi-biennial oscillations) at all areas, and the second period of Region I and II are 5.1 and 9 years which have different periodic circulation.