煤矿区土地利用变化对生态系统植被碳储量的影响——以徐州垞城矿为例  

Impact on vegetation carbon storage in ecosystem from land use change in coal mine area:A case study at Chacheng Mine in Xuzhou mining area

作　　者：侯湖平[1] 张绍良[1] 丁忠义[1] 马昌忠[1] 黄安平[1] 

机构地区：[1]中国矿业大学环境与测绘学院,江苏徐州221116

出　　处：《煤炭学报》2013年第10期1850-1855,共6页Journal of China Coal Society

基　　金：国家自然科学基金资助项目(51074154);江苏高校优势学科建设工程资助项目(PAPD)

摘　　要：以徐州垞城矿为例,通过RS和GIS技术,采用改进的CASA模型对煤矿区1987年、1998年、2005年、2008年的植被碳储量进行了测算研究,结果表明:矿区碳储量的年平均值的变化量与采矿生产能力呈高度负相关,相关系数为-0.902,随着矿区生产能力从45万t/a提高到100万t/a,植被碳量的年平均碳密度值从181.24 g/m2下降到111.43 g/m2,矿区总碳储量从443.53 Pg下降到272.68 Pg;不同土地覆盖类型植被碳密度分析得出,耕地的碳密度降低了43.91 g/m2,林地碳密度降低了53.52 g/m2,水域用地碳密度降低了81.44 g/m2;分析矿区采矿活动导致的土地利用变化对矿区碳储量的影响表明,在1987—2008年间矿区碳总量降低了170.85 Pg,其中耕地碳总量降低了203.90 Pg,是矿区碳总量降低的主要原因,是因为采矿活动导致矿区耕地面积的减少和耕地碳密度降低所导致的,林地碳总量增加了25.39 Pg,是因为采矿活动导致耕地转变为林地,林地面积增大所引起的。This study investigated the vegetation carbon storage in 1987,1998,2005 and 2008 at Chacheng Mine in Xuzhou mining area using the techniques of RS and GIS and the modified CASA model. The results show that the aver- age annual value of vegetation carbon storage in the mining area is highly negatively correlated with the mining produc- tion capacity, and the correlation coefficient is -0. 902. As the production capacity increases from 0. 45 Mt/a to 1 Mt/ a, the average annual carbon density value of vegetation carbon storage decreases from 181.24 g/m2 to 111.43 g/m2, and the total vegetation carbon storage decreases from 443.53 Pg to 272.68 Pg; By analyzing the vegetation carbon density of different land cover types in the study period, it is found that the carbon density of cultivated land, forest land,and water plot decreases by 43.91 g/m2 ,53.52 g/m2 ,and 81.44 g/m2 respectively; By analyzing the influence on vegetation carbon storage in the mining area by land use changes caused by mining activities, it demonstrates that during the period from 1987 to 2008, the total carbon reserves decreases by 170. 85 Pg,while the carbon storage of cultivated land decreases by 203.90 Pg which becomes the main factor for the total carbon storage decrease in the are- a. This means that the mining activities can lead to the reduction of cultivated land and the decrease of carbon density in cultivated land. As for the increased 25.39 Pg at forest land ,the reason is that the mining activities make cultivated land into forest land.

关 键 词：煤矿区 土地利用变化 植被碳储量 垞城矿 

分 类 号：X171[环境科学与工程—环境科学]