應用3S技術於台中縣烏石坑崩塌地植生復育之評估

集集地震造成台灣中部地區眾多崩塌地，在經費及技術限制下，崩塌地採用人工或自然植被重建，備受爭議。本研究應用地理資訊系統（GIS）結合四期SPOT影像、全球定位系統（GPS）測繪資料及不同空間資料，監測台中縣和平鄉烏石坑崩塌地人工植被重建之狀態，以評估其成效並提建崩塌地處理對策。就兩年監測期來看，本區崩塌地植生恢復緩慢，然因颱風豪雨的影響及監測期不夠長之故，目前尚難論斷其植生復育之成效。但崩塌地通常土層淺薄，地形險阻，植被重建施工困難，且易再崩塌，恐事倍功半。因此，崩塌地除迫切需要處置者外，建議採取非入侵式之遙測技術長期監測植生復育之狀態，不但避免干擾生態之反效果，且所費不多。

關鍵字

崩塌地；植被重建；遙測；地理資訊系統；全球定位系統

並列摘要

Chi-Chi earthquake caused many landslide scars in the central Taiwan. Under the constraints of technology and budget, adopting artificial or natural revegetation for bare lands was debatable. The objective of the study was to assess plant recovery of the bare lands at Wu-Shyr-Keng to provide the Forest Bureau with reference information for making a decision on reforestation of bare lands. The study applied GIS technique to combining four-date SPOT satellite images, GPS mapping data, and other different spatial data to achieve the goal. For the two-year period, plants of the bare lands in the study area have not yet grown strikingly. Because of the short monitoring period and the influence of typhoon's strong rain, the effect of reforestation on the bare lands is difficult to determine currently. However, reforestation may generally achieve little result despite Herculean effort owing to shallow soils and difficult terrain over bare lands. Hence, the study suggests that long-term monitoring plant recovery using remote sensing with low cost and non-invasive characteristics over bare lands be continued, except in urgent cases.

並列關鍵字

landslide scar ； revegetation ； remote sensing ； geographic information system (GIS) ； global positioning system (GPS)

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應用3S技術於台中縣烏石坑崩塌地植生復育之評估

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