Meteorological Analysis of Installation Effects of a Windbreak Net on Reducing Wind Speed at An Apple Orchard

In this study, the installation effects of a windbreak net on reducing wind speed were examined using meteorological observation data. Three automatic weather systems (AWS) were installed at the inside of the windbreak net of an apple orchard along the distance, and one AWS was located at the outside. They were set up on Oct. $25^{th}$, 2012 at the apple orchard of Geochang County, and meteorological data, which were observed at four stations for about 1 year from October 26, 2012 through October 21, 2013, were used for this study. Meteorological variables include air temperature & relative humidity at a height of 1.5 meter, and wind speed & wind direction at a height of 2 meter and 4 meter. These variables were measured and recorded every 60 seconds. The preliminary results of this study was as follows: (1) Daily mean temperature at the inside of the windbreak net was lower than that of the outside by 0.1 through $0.2^{\circ}C$. (2) Daily mean relative humidity at the inside of the windbreak net was higher than that of the outside by 0.7 through 1.7%. (3) As compared to the outside, northerly daily maximum wind speed of the inside of the windbreak net at a height of 2 and 4 meter was reduced by 0.7~1.5 $ms^{-1}$ (30.4~65.2%) and 0.3~0.7 $ms^{-1}$ (10.3~24.1%), respectively.

방풍망 설치 과수원의 강풍피해 저감효과의 기상학적 분석

본 연구는 방풍망이 설치된 사과원 주변에 자동기상관측장비를 설치하고, 이로부터 수집한 온 습도와 풍속 등 기상 관측자료를 분석하여, 방풍망을 설치한 사과원 내부의 풍속저감 효과와 군락미기상의 변화 등의 기상학적 특성을 평가하고자 수행하였다. 2012년 10월 26일부터 2013년 10월 21일까지 약 1년간 수집한 기상자료를 토대로 분석한 결과는 다음과 같다. (1) 방풍망 내부의 일평균기온은 외부보다 $0.1{\sim}0.2^{\circ}C$ 낮았고, (2) 방풍망 내부의 일평균습도는 외부보다 0.7~1.7% 범위로 높았으며, (3) 북풍계열 바람의 방풍망 내부의 일최대풍속은 외부보다 2m와 4m의 높이에서 각각 $0.7{\sim}1.5ms^{-1}$(30.4~65.2%)와 $0.3{\sim}0.7ms^{-1}$(10.3~24.1%) 범위로 감풍되는 것으로 조사되었다.