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題名 | 塔塔加高山生態系土壤熱擴散係數之研究=The Studies on Soil Thermal Diffusivity in Tatachia Alpine Ecosystem |
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作者 | 陳信雄; 魏聰輝; Chen, Hsin-hsiung; Wey, Tsong-huei; |
期刊 | 國立臺灣大學農學院實驗林研究報告 |
出版日期 | 20020300 |
卷期 | 16:1=235 2002.03[民91.03] |
頁次 | 頁61-70 |
分類號 | 436.193 |
語文 | chi |
關鍵詞 | 土壤熱擴散係數; 土壤阻尼深度; 正弦函數; 調和分析; 塔塔加高山生態系; Soil thermal diffusivity; Soil damping depth; Harmonic analysis; Sinusoid equation function; Tatachia alpine ecosystem; |
中文摘要 | 本研究分別蒐集塔塔加高山生態系研究站所設立的觀山、雲杉林等兩個氣象站,深度各為0.05、0.1、0.2、0.3、0.5及1.0m之土壤溫度,數據經調和分析後,應用正弦函數方程式推算各層次熱擴散係數與阻尼深度。以調和分析結果,各層次第一階及第二階調和函數的均方,佔序列總均方之比率均已逾95%,而且與深度之關係,呈現正比例增加。觀山站各層次土壤熱擴散係數介於2.85~4.65×10-3cm2s-1,雲杉林氣象站土壤熱擴散係數介於2.85×10-3~1.13×10-2cm2s-1,估測值亦隨著深度而增加。兩個站的表層阻尼深度均為169cmYr-1,代表該地區表層土壤溫度的年振幅將於這個深度消失,為了避免輸送的水源於冬季期間在水管內凍結,埋設水管的深度應達到此一深度。 |
英文摘要 | Soil temperature data were collected in depths of 0.05, 0.01, 0.2, 0.3, 0.5 and 1.0m at two established observatories of the Tatachia aloine ecosystem, Guan-Shan and Spruce Forest Observatories, respectively. After harmonic analysis, the data were calculated with sinusoid equation to obtain soil thermal diffusivity of each depth and soil damping depth. Harmonic analysis provided that the mean square of the first and the second steps of harmonic analysis in each depth is over 95% of mean square of sequence and increases with increasing soil depth. The soil thermal diffusivity at Guan-Shan Observatory ranges between 2.85 and 4.65×10-3cm2s-1, and at Spruce Forest Observatory ranges between 2.85×10-3 and 1.13×10-2cm-2s-1, respectively. The estimated value of soil thermal diffusivity also increases with increasing soil depth. The damping depth of both observatories was 169cmyr-1, suggesting that in this area annual amplitude of soil surface temperature disappeared in this depth. In order to prevent the freezing of the water source transported within the pipes, the pipes should be buried at this depth. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。