摘要
本研究係在澎湖本島地區勘選貫穿南北兩岸之測線，並分別自北岸超量測不同距離、不同高度之風速及鹽份分布剖面，以了解飄鹽量受地形、地物影響之程度，同時於南北兩岸觀測潮汐變化與飄鹽分布之關係，並將觀測期間之氣象條件，納入影響鹽份分布之因子中分析。此外，有鑑於澎湖造林不易成功，故本研究特地測定現地植物葉面鹽份附著量與土壤含鹽量，並比較其與飄鹽量之關係，藉以瞭解澎湖鹽害之原因。由研究結果發現，飄鹽量與高度間存在對數之關係，而與風速間則存在指數關係，但潮汐變化使海岸汀線附近之飄鹽量並非完全遵循此一關係。再者，飄鹽量之變化與地形起伏之趨勢一致，故在較內陸地區，亦可能因地形之變化，造成鹽份量突增之現象；而在貫穿南北兩岸之測線上，空中鹽份消減量比風速消減量高出約30％。又防風林帶內單位葉面鹽份附著量，在北岸地區距海岸線愈遠，附著量愈少，且所有樣本中，以東北季風期間之附著量最大，但在同一時期，南岸地區植物葉面之鹽份附著量幾與北岸等值。在土壤鹽份分布之資料中顯示，其與地形間並無明顯關係，且受採樣時期影響，彼此差異頗大。
並列摘要
The main objectives of this study are (1) to choose a observed line through the south and the north of Peng-Hu to assess the influences of the tenrain and the obetacles above the ground on the salt distributional characterictics under the different distances, wind velocity of different heights and different sections of salt, and (2) to analyze the influences of the weather on the distribution of the salt, under the changes of tides and the different weather condition in Peng-Hu area. Because it is difficult to reforest in Peng-hu, the amounts of the salt on the leaves and in the soil are compared with those in the air to investigate the salt demages to trees in Peng-Hu. The experiment results indicate that there exist a logarithm relation between the amount of the salt in the air and the height and an exponential relation between the salt and the wind velocity. However this relationship does not apply to area near shore line due to the influence of the tide. It is also observed that the change of the salt amount in the air closely follows the ups and downs of the terrain. Therefore, in the inner area of Peng-Hu, it is possible that the amount of the salt increases sharply due to the terrain change. The reduced amount of the salt in the air is about 30% higher than the reduced wind velocity. The data also reveals that farther away from the seashore of the north the windbreak is the less amount of the salt the unit leaf has. The amount of the salt on a leaf at the south is about the same as that at the north. The amount of the salt in the sand is related more to the sampling dates than to the terrain changes