以高光譜資料分析藻華現象之可行性研究

The Feasibility Study of Using Hyperspectral Data to Analyze Algal Bloom Phenomenon

章國威(Kuo-Wei Chang) ； 陳伯中(Pei-Chung Chen) ； 申雍(Yuan Shen) ； 郭寶錚(Bo-Jein Kuo)

《作物、環境與生物資訊》 4卷3期 (2007/09) Pp. 173-184

https://doi.org/10.30061/CEB.200709.0001

摘要

隨著科技進步之日新月異，人造衛星上之酬載感測儀的空間解析度與波譜解析度不斷地精進改良。高光譜與高解析衛星雖然提供了大量且複雜之空間與光譜資訊，但如何從其中挑選出可供使用之有用資訊，則是使用者在使用這些高解析與高光譜衛星資料時所需面對之課題。本研究以可攜式光譜儀量測甲藻、矽藻及綠藻在不同濃度下之藻體懸浮液與藻色素粗萃液之高光譜資料，同時測定甲藻、矽藻及綠藻之生物量與其藻色素含量。並進一步建立甲藻、矽藻及綠藻之生物量及其藻色素含量與高光譜資料之關連性，從而建立選取高光譜資料的模式，未來將再進而以高光譜資料分析德基水庫之藻華現象。

關鍵字

高光譜 ； 藻華 ； 甲藻 ； 矽藻 ； 綠藻

並列摘要

The spatial resolution and spectral sensitivity of payloads on satellites have been constantly developed with technique improvement. The high spatial and hyperspectral satellites afford quantitative and complicated spatial and spectral information, but how to select useful information is a challenge for the users trying to use these high spatial and hyperspectral data. In this study, we used a portable spectroradiometer to acquire hyperspectral data of dinophyte, diatom, and chlorophyte suspensions at different concentrations. The biomass and algal pigments of dinophyte, diatom, and chlorophyte were also measured. Furthermore, the relationships between the biomass and algal pigments of dinophyte, diatom, and chlorophyte and their hyperspectral data were established. Finally, we extracted the needed information from the relationships and used the hyperspectral data to analyze the algal bloom phenomenon in Techi Reservoir.

並列關鍵字

Hyperspectral data ； Algal Bloom ； Dinophyte ； Diatom ； Chlorophyte