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題 名 | 地形效應對於全天光空域影響之研究=A Study on Topographic Influences on Whole Light Sky Space |
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作 者 | 陳信雄; 邱祈榮; 賴彥任; | 書刊名 | 國立臺灣大學農學院實驗林研究報告 |
卷 期 | 14:1=227 2000.03[民89.03] |
頁 次 | 頁1-9 |
分類號 | 328.481 |
關鍵詞 | 太陽輻射; 地形效應; 全天光空域; Solar radiation; Topographic influence; Whole light sky space; |
語 文 | 中文(Chinese) |
中文摘要 | 太陽輻射為生態系之主要能量來源,影響並控制著植群分佈,在生態系研究常將其視為主要變數之一。然而,許多研究人員經常將研究區域假設在平坦的環境,卻忽略了地形所可能造成的遮蔽。尤其是臺灣的山區,地形起伏量十分大,對於太陽輻射量的遮蔽可能有著相當大的影響。因此本研究目的希望藉由數值地形資料發展自動化模式來分析地形遮蔽效應對各網路點的全天光空域之影響,以供生態系研究上之參考。 經由開發之程式計算結果顯示,因地形起伏不定,影響之地形不止是鄰近地形,也有可能是附近山脊或集水區分水嶺。而於陳有蘭溪集水區之全天光比例因子,平均約為0.78,即地形遮蔽效應使研究區域之平均全天光空域面積減少22.3%。 |
英文摘要 | Solar radiation is the primary driving force in forest ecosystem, which influences the distribution of vegetation. Usually, it was thought one of the important variables in the research of ecological modeling. However, most researchers always assumed their study sites as horizontal and unobstructed area, and ignored the topography effect on the insolateion at a given location in the mountainous area in Taiwan. In this study, based on the DTM data, a program was developed for caculating the whole light sky space. The results show that topographic influences don't cause only by close terrain, but also cause by ridgeline or watershed. The results of this study also indicate that average skyview factor is about 0.78 on the Chen-Yu-Lan Watershed. In the other hand, because of topographic effects, the average of whole light sky space area of the whole study area could reduce 22.3%. |
本系統中英文摘要資訊取自各篇刊載內容。