区域土地利用总体规划碳效应分析——以青海省海东市为例

Carbon Effects of Regional Land Use Planning: A Case Study of Haidong City,Qinghai

土地利用变化直接或间接地改变着陆地生态系统碳源、碳汇的分布和大小,进而影响其碳循环过程。因此,进行区域土地利用及其碳效应定量研究和评价,对区域土地资源科学管理和可持续发展具有重要意义。本文以青海高原东部的海东市为研究区,在确定土地利用类型碳循环参数的基础上,对规划情景下土地利用变化引起的碳平衡进行分析测算。研究结果表明,在规划情景下,到2020年土地利用结构调整对区域碳平衡有较大的影响。相对于2009年,规划目标年土地利用变化导致区域碳储量增加628.79万t,并以农用地的碳储量为主;规划情景下,区域碳排放量呈增长趋势,碳排放量增加191.91万t。虽然规划情景下,土地利用变化导致区域碳排放的增加,但土地利用结构的优化调整却有利于区域碳储量增加。

As reported in literature,the land use / cover change may influence the regional carbon balance directly or indirectly. Therefore,quantitative research and evaluation of carbon effect caused by regional land use change is of vital significance to improve the regional environment. Based on the discussion of carbon cycle parameters,this paper took Haidong city as a case study to investigate land use / cover change and regional carbon balance under general land use planning in Haidong( 2009- 2020),and adopted the method of ecological system type to estimate the incremental trend of carbon effect of study area from 2009 to 2020,which indicates that carbon storage has being rising year by year. The increment of carbon storage caused by land use / cover changes is 6. 2879 million tons. Besides,the expansion of construction land causes carbon emission increased by 1. 9191 million tons. The increment of carbon storage and carbon emission caused by land use / cover changes which indicates that land use changes under general land use planning in Haidong can exercise remarkable impact on carbon balance and sustainable development.