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題 名 | 合歡山臺灣冷杉林降水再分配=Precipitation Redistribution of the Taiwanese Fir Forest at Mt. Hehuan |
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作 者 | 金佐蒔; 久米朋宣; 王立志; | 書刊名 | 國立臺灣大學生物資源暨農學院實驗林研究報告 |
卷 期 | 31:3=297 2017.09[民106.09] |
頁 次 | 頁143-152 |
分類號 | 436.19 |
關鍵詞 | 降水; 穿落水; 幹流水; 截留; 臺灣冷杉; Precipitation; Throughfall; Stemflow; Interception; Taiwanese fir; Abies kawakamii; |
語 文 | 中文(Chinese) |
中文摘要 | 當雨水降落森林受到冠層攔截,部分降水將留存於冠層之中,而改變降水到達地面時間延遲或改變空間上分佈。本研究於合歡山台14甲線35.5 km,近小風口處,對臺灣冷杉林進行降水再分配研究。研究期間(2011.3〜2012.2)合歡山臺灣冷杉樣區之林外年降水量為3,560 ± 110 mm,經林冠交互作用後,穿落水量為3,070 ± 90 mm(86 %年林外降水 量),幹流水量為200 ± 10 mm(6 %年林外降水量),若以截留量=林外降水量-穿落水量-幹流水量計算,則林冠截留量為290 mm(8 %年林外降水量)。而穿落水量與林外降水量呈現顯著線性關係(穿落水量(mm)=0.85林外降水量(mm)+1.76,R^2=0.97,n=28,1 3≦ 林外降水量≦3 6 3)。另幹流水量也與林外降水量呈現顯著線性關係(幹流水量 (mm)=0.05林外降水量(mm)+0.41,R^2=0.53,n=28,13≦林外降水量≦363)。至於,雙週截留率(雙週截留量/雙週林外降水量)變化顯示臺灣冷杉林冠在夏、秋季時期因降雨日數較少,且氣溫較高,而冠層較為乾燥,致使截留能力較佳。 |
英文摘要 | When forest canopy intercepts rainfall, water could be partially kept in the canopy, which could change the timing and redistribution of rainfall reaching forest floor. In order to understand the precipitation redistribution of the Taiwanese fir (Abies kawakamii) forests, this research was conducted at the 35.5 km mark of highway 14A near Xiao-Feng-Kou tourist center at Mt. Hehuan, from Mar-2011 to Feb-2012. Results showed that annual precipitation was 3,560 ± 90 mm, throughfall was 3,070 ± 110 mm (86% of annual precipitation), and stemflow was 200±10 mm (6% of annual precipitation) for the Taiwanese fir forests during the studied period. According to the water balance formula (interception = precipitation - throughfall - stemflow), the annual interception was calculated to be 290 mm (8% of annual precipitation) for this Taiwanese fir stand. A good linear relationship was found between throughfall and precipitation (throughfall=0.85 precipitation+1.76, R^2=0.97, n=28, 13≦precipitation≦363). A good linear relationship was also found between stemflow and precipitation (stemflow=0.05 precipitation+ 1.76, R^2=0.53, n=28, 13≦precipitation≦363). Higher bi-weekly interception rate (bi-weekly interception/precipitation) could also be found during summer and fall due to fewer rainy days and higher air temperature that resulted in drier canopy. |
本系統中英文摘要資訊取自各篇刊載內容。