Atmosphere (대기)
- Volume 16 Issue 3
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- Pages.169-185
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- 2006
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- 1598-3560(pISSN)
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- 2288-3266(eISSN)
Variation of Wind Field over the Leeward Area According to the Local-scale Geographical Variation under Strong Wind Condition
강풍조건에서 국지규모 지형 변화에 따른 풍하측 바람장 변화
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Jung, Woo-Sik
(Department of Atmospheric Environment Information Engineering/Atmospheric Environment Information Research Center, Inje University) ;
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Park, Jong-Kil
(Department of Environment Sciences Engineering/Atmospheric Environment Information Research Center, Inje University) ;
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Lee, Hwa Woon
(Department of Atmospheric Sciences, Pusan National University) ;
- Kim, Eun-Byul (Department of Atmospheric Environment Information Engineering/Atmospheric Environment Information Research Center, Inje University)
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정우식
(인제대학교 대기환경정보공학과/대기환경정보연구센터) ;
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박종길
(인제대학교 환경공학부/대기환경정보연구센터) ;
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이화운
(부산대학교 대기과학과) ;
- 김은별 (인제대학교 대기환경정보공학과/대기환경정보연구센터)
- Received : 2006.06.07
- Accepted : 2006.08.02
- Published : 2006.09.30
Abstract
We have investigated the wind speed variations over the leeward region when the strong wind blows. In this study we employ Envi-met numerical model to simulate the effect of surface boundary conditions. This model is applied for three cases which are characterized by land use and terrain height. The base case having natural geographical condition shows the weakest wind speed around lee side of Chunsudae. The others which remove the vegetation and cut off the terrain above 20 m ASL represent the stronger wind speed than base case. The main factor of this result is the surface friction. The distinct variation of wind is found at offshore area between Chunsudae and the southern part of village, but the northern part where is apart from Chunsudae shows a small variation of wind pattern. The weakening of wind speed around residential area is a maximum of 4~10 m/s when the wind blows in the village as strong as 55 m/s. The gust wind speed is weakened about 7~17 m/s in this case if the coefficient of gust wind adapted as 1.75.