以SPOT衛星影像探討淡水河紅樹林自然保留區植生指標之變化

Using SPOT Satellite Image to Study the Variation of Vegetation Index for Tamsui River Mangrove Natural Reserve

王慈憶(Tzu-Yi Wang) ； 陳建璋(Jan-Chang Chen) ； 陳朝圳(Chaur-Tzuhn Chen)

《作物、環境與生物資訊》 3卷3期 (2006/09) Pp. 229-238

https://doi.org/10.30061/CEB.200609.0004

摘要

利用衛星影像之光譜特性所推算之植生指標，不但可表示植生量的高低，亦可供為植群健康監測之指標。本研究以淡水竹圍紅樹林為研究區域，利用1994年至2005年之不同生長季節之多期SPOT衛星影像，進行常態化差異植生指標(NDVI)分析，以NDVI影像推估淡水河紅樹林生育地在十年間之變異及季節性變化，並配合水文及水質資料，探討淡水河紅樹林之保育問題。結果顯示近十年紅樹林NDVI由0.265增加為0.465，各不同季節間具有顯著差異，而雖然水污染程度有逐漸嚴重之趨勢，但對紅樹林的生長並不產生影響，唯水質污染是否造成紅樹林棲地其他生物之影響，則有待研究。

關鍵字

水筆仔 ； 常態化差異植生指標 ； 健康監測 ； 衛星影像 ； 水質污染

並列摘要

Using the spectral characteristic of satellite images to estimate vegetation indices not only can show the level of vegetation biomass, but also can be applied to the monitoring index of plant health. This study was conducted in Tamsui River Mangrove Natural Reserve, and utilized the multi-temporal SPOT images in different growing seasons from 1994 to 2005. We applied normalized difference vegetation index (NDVI) to detect the changes in vegetation of decennium and seasonal variation in Tamsui River Mangrove Natural Reserve. The NDVI information was incorporated with hydrology and water quality data to study the conservation issue of the Tamsui River Mangrove. The results revealed that mangrove NDVI increased from 0.265 to 0.465 in the past ten years and there existed differences among seasons. The influence of water pollution on mangrove is not clear from the images, and needs to be further studied.

並列關鍵字

Kandelia obovata ； Normalized difference vegetation index ； Health monitor ； Satellite image ； Water pollution