澎湖海岸防風構造物之研究（I）海岸防風林與防風牆之防風防塩功效比較實驗

Investigation on the Coastal Windbreak constructions in Peng Hu (I) The comparitive Experiments on the Effects of wind Reduction and Flying Salt Control of Coast windbreak and the Windbreak Wall

江永哲(Yung-Cheh Chiang) ； 黃隆明(Long-Ming Huang) ； 邱啓芳(Chii-Fang Chiou)

《中華水土保持學報》 19卷1期 (1988/05) Pp. 3-27

https://doi.org/10.29417/JCSWC.198805_19(1).0002

摘要

本實驗係針對澎湖縣防風牆，探討其防風及防鹽之功效，並配合防風林及空曠地，加以比較，俾能整理出有系統之資料，以提供林業機構規劃防風及防鹽設施之準則，經實驗結果如下：1.防風牆與誨岸防風林之防風及防鹽效果，隨背風面水平距離增加而減少。2.在防風效果方面：以海岸防風林最佳，有效範圍達13倍林高距離；防風牆次之，有效範圍達8.5倍牆高距離；最差者爲空曠地。3.在防鹽效果方面：以海岸防風林最佳，有效範圍達10.5倍林高距離；防風牆次之，有效範圍達7〜8倍牆高距離；最差者爲空曠地。防風牆與海岸防風林背風面有下列特性：（1）風速及鹽分剖面皆符合對數法則。（2）鹽分對數值與風速成正比。（3）防風效果與防鹽效果成正比。

關鍵字

海岸防風林 ； 防風牆

並列摘要

The experiment is primarily to study the effects of windbreak walls on wind reduction and flying salt control at Peng-Hu County. The effects of windbreak and wild field are also studied and compared with one another. By doing so, we can get systematic data for forest management. The results were found as follows: 1. Effects of wind reduction and flying salt control decreased with the increase of distance behind the windbreak wall and windbreak 2. For wind reduction, windbreak was the best. Its protected distance was about 13 times of the height of windbreak. The windbreak wall, protected 8.5 times of the height of the windbreak wall, was not better than the windbreak. The wild field was even worse. 3. For flying salt control, results were similar as those for wind reduction. 4. The characteristics of windbreak and the windbreak wall are listed as follows (1) The logarithm law could be applied to both the relationships between wind velocity and vertical profile and between flying salt and vertical profile. (2) The logarithm of salt content is in direct proportion to the wind velocity (3) The effect of wind reduction is in direct proportion to the effect of flying salt control.

並列關鍵字

Coast windbreak ； Windbreak wall