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題名 | 數值高程模型應用於日輻射潛能之推估--以大武山自然保留區為例=Using Digital Elevation Model to Estimate Potential Solar Irradiance--An Illustration of Tawushan Nature Reserve |
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作者 | 陳朝圳; Chen, Chaur-tzuhn; |
期刊 | 中華林學季刊 |
出版日期 | 19970300 |
卷期 | 30:1=116 1997.03[民86.03] |
頁次 | 頁93-104 |
分類號 | 449.62、449.62 |
語文 | chi |
關鍵詞 | 數位高程模型; 日輻射; 生態系; Digital elevation model; Solar radiation; Ecosystem; |
中文摘要 | 大武自然保留區為臺灣南部地區動植物生態系之代表,在生態系研究上有其重要意義,由於保留區之地形變化會影響局部之微氣侯,進而造成不同的生物棲息環,因此藉由數位高程模型推導空間性之物理環境因子為整體生態系研究之基礎。在複雜的物理環境因子中,太陽輻射為生態系之主要能量來源,其為野生生物生態環境研究之有效變數,亦為整體生態系能量流轉、養份循環及食物鏈關係之影響機制,因此如何掌握空間性之太陽輻射能為研究之重點。本研究以大武山自然保留區之數值高程為材料,先以VGA/ERADS影像處理軟體推估各網格點之坡向、坡度資料,以Quick Basic電腦語言發展幾何運算程式,計算各網格點位置受地形遮蔽之影響程度,再配合天文運算公式開發空間性日輻射潛能自動化推估程式,資料檔以VGA/ERDAS、PC-ARC/INFO兩種不同類型軟體之資料格式產生,以提高資料之共通性。研究結果可將已往所推估之單點日輻射潛能,拓展為面型日輻射潛能分布,且已考慮地形遮蔽影響,其對於整體生態系研究,將可提供一有效之物理環境變數。 |
英文摘要 | Tawushan Nature Reserve is a typical ecosystem of animal and plant in southern Taiwan which that has an important meaning for ecological research. Since the micro-climate effected by the terrain makes different habitat environment, derivation of spatial physical environment factors from a digital elevation model is basic to the sutdy of whole ecosystem. Among the complexities of the physical environment factors, solar irradiance is the source of energy in the ecosystem. It is also an effective variable in ecological research as well as an effective mechanism among energy flow, nutrient cycle and food chain in the whole ecosystem. Therefore, how to deduce spatial solar irradiance is essential in this project. In this study, a digital elevation model of Tawushan Nature Reserve was used to derive the aspect and slope data for each pixel by using a image processing system, the VGA/ERDAS. Program for terrain analysis was deveoped by the author using quick Basic. Furthermore, the formulas use by Frank and Lee(1966), Buffe et al.(1972), and Swift (1976) were extended to provide more details for the calculation procedures, particularly with regard to special problem and the effects of intervening obsturction by terrain. The results of this study suggest that it is feasible to calculate both instantaneous and total direct beam irradiance. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。