建構台灣林地蓄積量之估算-以苗栗縣為例

Abstract

1992年通過之「聯合國氣候變化綱要公約」中要求締約國承諾必須定期提報國家通訊報告（National Communication）。報告中其中一項為國家溫室氣體清冊（National Greenhouse Gas Inventory）。對於清冊的編撰規範，聯合國氣候變化政府間專家委員會（Intergovernmental Panel on Climate Change, IPCC）於2006年提出國家溫室氣體清冊指南（2006 IPCC Guideline for National Greenhouse Gas Inventory），供各國編撰參考，而指南中規範了土地利用類型、生物量及碳匯估算方法。 本研究依照 IPCC指南規範土地利用類型，整合既有各部會監測成果、林務局資源調查等資訊，發展年度森林面積增加及減少變遷估算機制，掌握每年森林面積異動變化，並結合第四次森林資源調查與公、私有林分區計畫計算蓄積量，供後續碳量估算使用，並以苗栗縣為案例進行驗證。面積推估結果森林總面積為118,934 ha，佔¬苗栗縣總面積之66%，其中森林仍維持森林（FF）之面積為118,931 ha（占苗栗縣65%）；非森林轉成森林（LF）之面積為3.7 ha，森林轉換為非森林之面積為392 ha(占苗栗縣0.2%)。總材積為3,094萬立方公尺。

According to United Nations Framework Convention on Climate Change（UNFCCC）,each contracting party should submit their National Communications report regularly.One of the required is the National Greenhouse Gas Inventory. For the inventory of compilation rules, the United Nations Intergovernmental Panel on Climate Change (IPCC) in 2006 presented IPCC Guidelines for National Greenhouse Gas Inventory, and provided the reference for other States to compile. In the guidelines, it regulates the type of land application, biomass and carbon sequestration estimated methods. Base on IPCC guidelines, this study regulates the types of land use, and integrates interministries monitoring results and Forest Service’s forest resource inventory information, and develops the annual change of the forest area estimates mechanism to grasp changes in forest area. Combining above results and the fourth national forest resources inventory and public and private forest of partition planned to calculated growing stock, the study’s finally result can provided the amount of carbon estimates for subsequent use. The estimated result of total forest area is 118,934 ha, accounting for 66% area of Miaoli. Among them, the forest land remaining forest（FF） area is 118,931 ha (account for 65% area of Miaoli)； the non-forested land converted to forest land（LF）area is 3.7 ha, the area of forest converted to non-forest is 392 ha（account for 0.2 % area of Miaoli）. The total growing stock is 30,940,822 m3.