Abstract
본 연구에서는 서울지역에서의 강우의 시 공간적 특성을 파악하기 위하여 크리깅 기법과 이동평균법을 적용하였다. 강우의 시간적 특성을 분석하기 위하여 가중이동평균법과 지수이동평균법을 적용하여 각각의 가중치에 따른 오차를 분석하였다. 최소오차가 발생하는 가중이동 평균법을 이용하여 서울기상대와 AWS자료를 분석한 결과, 여름강우 중 장마를 제외한 나머지 기간에 강우가 집중되고 있으며, 강우량 또한 증가하는 추세를 보였다. 강우의 공간적 특성을 분석하기 위하여 크리깅 기법을 적용하였으며, 크리깅 기법 중 spherical model이 대상지역의 집중호우에 대한 공간적 분포를 가장 잘 묘사하였다. 그리고 강우강도에 따라 매개변수를 산정하여 비교하였다. 분석결과 크리깅 기법을 적용한 면적평균강우량이 티센가중법에 의한 면적평균강우량 산정으로 인한 과대추정의 위험을 줄일 수 있을 것으로 판단된다. In this study, kriging and moving average method were applied in order to comprehend temporal and spatial characteristics of rainfall in Seoul area. Errors were estimated depending on weights of weighted moving average model and exponential moving average model for analyzing temporal characteristics of rainfall. According to the results of the analysis of rainfall database of the Seoul Meteorology Station and AWS(Automatic Weather Station) by using the weighted moving average model having minimum errors, rainfall was concentrated in the summer months except for the rainy season and tend to increase the total amount of rainfall. The kriging was applied for analyzing spatial characteristics of rainfall and the spherical model well depicted spatial distribution of urban heavy rain in target area. And parameters were calculated and analyzed in accordance with rainfall intensity. The result show area-averaged rainfall using kriging reduced risk of overestimation of area-averaged rainfall using Thiessen weighting method.
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