台灣地區林業部門溫室氣體減量推估之研究-以桃園縣為例

The Computation of Greenhouse Gas (GHGs) Reduction from Taiwan Frorest Department: A Case Study of Taoyuan County

陳敏葳(Ming-Wei Chen)

指導教授 ： 於幼華

國立臺灣大學/工學院/環境工程學研究所/碩士(2009年)

https://doi.org/10.6342/NTU.2009.10722

摘要

桃園縣為台灣第一大縣，歷來工商業發達，至2006年止人口數達191.12萬，且近來另有規劃將桃園國際機場、台灣高鐵青埔站搭配興建中之機場捷運線，建構一航空城，因此需了解其溫室氣體排放現況，以利後續減量政策的執行。桃園縣2006年溫室氣體排放量為3,658.01萬公噸，為降低其溫室氣體排放所造成之衝擊，可由二氧化碳減量(mitigation)及環境適應(adaptation)兩個主要方向著手，環境適應即為營造可持續的綠色環境，造林並強化森林經營，此一方向雖短時間無法看出其效果，但其對產業衝擊較小，長時間累積之碳吸收量仍相當可觀。
台灣杉為台灣原生物種，由於其本土研究資料較為完整，因此本研究採用台灣杉作一完整碳匯推估計算，設計造林密度2000株/公頃，推估其於造林20年後之總蓄積量與碳吸存量，由結果可以林齡20年時總蓄積量為42萬公噸CO2e/公頃，碳吸收量為46萬公噸CO2e/公頃;另一規劃方案為每年持續造林1公頃，周期20年，則於20年後總碳吸收量達434萬公噸CO2e/公頃，可吸收現有桃園縣溫室氣體總排放量約12%，因此持續的造林，長時間下來對溫室氣體減量仍有一定效益。
桃園縣土地使用與林業部門之CO2排放量主要來自森林及草原的變更，包含焚燒與腐朽釋出的二氧化碳；森林及其他木質生物蓄積量的改變、棄置的經營用地、森林土壤是主要的CO2吸收源。2006年桃園縣土地使用與林業部門之二氧化碳淨吸收量約為1,600萬公噸，平均每公頃森林面積可吸收378公噸的二氧化碳。

關鍵字

溫室氣體 ； 系統動態 ； 林業

並列摘要

Taoyuan County is one of the major counties in Taiwan. In 2006, the population has exceeded 1.91 million. There was an aviation town under construction, combining just as followed: the Taiwan Tao-Yuan International Airport, located in this region; the Ching-pu Station of Taiwan High Speed Rail Corporation (THSRC) and the Mass Rapid Transit (MRT) system. Therefore, it is necessary for the interrogation of Greenhouse Gases (GHG) in present for advanced enforcement of reduction policy in the future. The GHG emission amount of Tao-Yuan County is around 37 million tons. There are two directions for the purposes of decreasing the impact caused by GHG emission are the mitigation of carbon dioxide (CO2) and environmental adaptation. The latter one, namely, the construction of sustainable green environment, such as afforestation and intensification the operation of forest. It requires long time available and less impact to industry. However, the long-term accumulative of carbon absorption is considerably significant.
Due to the completeness of locally study supported by Taiwan Fir, an aboriginal species in Taiwan, this study focused on this kind of species for fully carbon sink simulation-calculation. Assumed that the density of afforestation is 2,000 trunk/hectare, and the total accumulation amount and carbon absorption amount after 20 years are 0.42 million tons CO2e/hectare and 0.46 million tons CO2e/hectare, respectively. Another planning project is continuously afforestation. After 20 years, also defined as afforestation cycle, it would reach about four hundred million tons CO2e/hectare. This amount is around 12% total GHG emissions for Tao-Yuan County. Therefore, in the long run, it is profitable for GHG reduction caused by continuously afforestation.
The land use and forest department of CO2 emission were mainly originated from the alternation of forest and pasture, inclusive of combustion and corruption. The major source of CO2 absorption are the change of forest and other woody carbon stocks , disgarded land, and forest soil. The net carbon absorption of Tao-Yuan County’s land use and Forest in 2006 was 1.6 million tons, and the average CO2 absorption is 378 tons per hectare.

並列關鍵字

Green House Gas ； STELLA ； Forest

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