坡面盤固拉牧草地之近地表氣流分布研究

Study on the Variation of Air Flow above the Pangola Pasture of Slopeland Surface

唐琦(Chi Tang) ； 陳誌良(Zhi-Liang Chen)

《作物、環境與生物資訊》 3卷2期 (2006/06) Pp. 185-192

https://doi.org/10.30061/CEB.200606.0007

摘要

本研究自2004年10月及2005年1、4、8月間於國立屏東科技大學畜牧場內之坡面盤固拉牧草地，以觀測鐵塔於離地面0.5、2、5、8、10m處進行不同高度之風速及風向測定，期能利於了解坡面牧草地之近地表空氣層氣流分布特性。初步研究獲知，坡面盤固拉牧草地於日出前及日沒後各出現一次平均風速低於0.5ms^(-1)之弱風狀態，顯示夜間之氣流行進異於晝間者，即晝、夜間分別會出現上、下坡氣流，而各季中不同高度之風速與高度間具對數遞增趨勢。

關鍵字

盤固拉牧草地 ； 上坡氣流 ； 下坡氣流

並列摘要

This study aimed at studying the variation on the nearby airflow above the slopeland pasture. There were four observations on the wind profile in October of 2004, and January, April and August of 2005. Data of wind speed and wind direction were collected at the observation tower, which located in the middle site of Pangola pasture of National Pingtung University of Science and Technology, Taiwan (elevation 90-55 m, area 33.2 ha, 22°38'54”N, 120°36'29”E). Results were summarized as followings. The weakened air turbulence of wind speed was less than 0.5 ms^(-1), which might appear either before sunrise or after sunset. Therefore, the airflow over the slopeland appeared as uphill breeze during the day and downhill breeze at night. The logarithmic relationship between the height above ground surface and the wind speed was positively correlated.

並列關鍵字

Pangola pasture ； Uphill breeze ； Downhill breeze