Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Multi-site Daily Precipitation Generator: Application to Nakdong River Basin Precipitation Gage Network

다지점 일강수 발생모형: 낙동강유역 강수관측망에의 적용

  • Keem, Munsung (Department of Environmental System Engineering, Pukyong National University) ;
  • Ahn, Jae Hyun (Department of Civil Engineering, Seokyeong University) ;
  • Shin, Hyun Suk (Department of Civil Engineering, Pusan National University) ;
  • Han, Suhee (Department of Environmental System Engineering, Pukyong National University) ;
  • Kim, Sangdan (Department of Environmental System Engineering, Pukyong National University)
  • 김문성 (부경대학교 환경시스템공학부) ;
  • 안재현 (서경대학교 토목공학과) ;
  • 신현석 (부산대학교 사회환경시스템공학부) ;
  • 한수희 (부경대학교 환경시스템공학부) ;
  • 김상단 (부경대학교 환경시스템공학부)
  • Received : 2008.07.07
  • Accepted : 2008.10.14
  • Published : 2008.11.30
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Abstract

In this study a multi-site daily precipitation generator which generates the precipitation with similar spatial correlation, and at the same time, with conserving statistical properties of the observed data is developed. The proposed generator is intended to be a tool for down-scaling the data obtained from GCMs or RCMs into local scales. The occurrences of precipitation are simultaneously modeled in multi-sites by 2-parameter first-order Markov chain using random variables of spatially correlated while temporally independent, and then, the amount of precipitation is simulated by 3-parameter mixed exponential probability density function that resolves the issue of maintaining intermittence of precipitation field. This approach is applied to the Nakdong river basin and the observed data are daily precipitation data of 19 locations. The results show that spatial correlations of precipitation series are relatively well simulated and statistical properties of observed precipitation series are simulated properly.

Keywords

Acknowledgement

Grant : 기후변화에 따른 수자원영향평가 및 관리방안 수립

Supported by : 한국수자원공사

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