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題 名 | 海岸林帶前後環境應力差異之調查研究--以新北市淡水區保安林為例=Study on the Difference of Environmental Stress between the Front and Rear of Coastal Protection Forests:A Case of Protection Forests in Danshui District, New Taipei City |
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作 者 | 游永清; 蔡志偉; 林信輝; | 書刊名 | 水土保持學報 |
卷 期 | 44:3 2012.09[民101.09] |
頁 次 | 頁267-282 |
分類號 | 436.285 |
關鍵詞 | 海岸林; 環境應力; 風速折減率; 環境差異; Coastal forests; Environmental stress; Environmental difference; Wind speed reduction ratio; |
語 文 | 中文(Chinese) |
中文摘要 | 臺灣地區現存保安林帶因環境應力、人為干擾等因素造成現存海岸保安林之受損與枯死, 進而影響保安林帶完整性;因此本研究以新北市淡水區1074 號保安林為調查區域,藉由探討 海岸保安林前、中、後對於環境應力之折減率,環境應力測定包括風速、溫度、相對濕度、噪 音、鹽霧量、飛砂量等六項,從而得知海岸保安林帶之環境保育效益,並比較有無保安林帶間 之效益差異,其可說明完整林帶之重要性。試驗結果發現,於定砂植物生長點之後,飛砂量折 減率可提高到66%,於有林木生長點後之飛砂量折減率更可達到95%以上,又鹽霧量、飛砂量 之主要影響來源為風速,風速之增減影響環境應力之遞移量,在無植物生長之樣線中更能顯現 出此現象,而在有保安林之樣線上呈現林前效益最低,林內效益最高,林後效益次之之狀況, 顯現保安林之存在對於保安林內及其後之範圍有保護之效用,研究結果顯示保安林內防風效益 可以達到平均90%,且能維持到林帶結束,而在完整之保安林帶後也可以達到防風效益70%左 右,更可見完整保安林存在之必要性。 |
英文摘要 | The protection forests in Taiwan have been damaged and withered because ofcauses such as environmental stress, human disturbances and so forth, and then the integrity of protection forests has been influenced. Therefore, this study investigates 1074 protection forests in Danshui District, New Taipei City. By exploring the reduction ratio of environmental stress of areas in front of the forest, in the middle of the forest and at the back of the forest, which includes wind speed, temperature, relative humidity, noise, capacity of saline fog and windblown sand, it is the objective to understand the reduction efficacy of the coastline protection forest and by comparing the difference of areas without the protection forest, the importance of forest integrity is illustrated. The consequence shows that the windblown sand reduction ratio can rise up to 66% after the plant that can stable sand, and after the growth point of forests, the windblown sand reduction ratio can reach over 95%, in addition to, the main factor of capacity of saline fog and windblown sand is wind speed, the fluctuation of wind speed affects the sediment delivery ratio of environment stress, and the capacity of saline fog and windblown sand is much higher in the area where no plants are grown than in the area where there are many plants. And the consequence of exploring the difference between the area in front of the forest and the area at the back shows that the reduction efficacy is the lowest in the front area and highest in the middle of the forest and thus indicates that the existence of protection forests has protection function for the area in the middle forest and its back area. The study shows that the reduction efficacy in the forests can reach 90% on average and can maintain until the end of the forests, and even behind the intact protection forests the reduction efficacy can reach 70%, which reveals the necessity of the existence of intact protection forests. |
本系統中英文摘要資訊取自各篇刊載內容。