摘要
建立煤矿瓦斯碳源温室效应潜能及区域生态系统碳汇的计算模型;依据煤矿瓦斯涌出数据估算出我国开采吨煤瓦斯碳源温室效应潜能值及徐州贾汪矿区瓦斯碳源温室效应潜能值;结合土地利用数据对贾汪区1990—2010年期间煤炭开采形成的碳源/碳汇效应进行了研究,认为煤炭开采过程中瓦斯碳源温室效应明显,研究区植被-土壤碳汇量逐年降低,水域负碳汇量逐年增加,这两种变化趋势随煤矿产量减少仍持续存在.研究结果表明:1)煤矿瓦斯是研究区域的主要碳源之一,我国吨煤瓦斯碳源温室效应潜能值为108.11kg CO_2当量,研究期贾汪区瓦斯碳源温室效应潜能总值为CO_2当量126.79万t,是其同期植被-土壤碳汇总量187.49万t的67.66%;2)煤炭开采活动削弱了区域生态系统的碳汇能力,贾汪区2010年植被-碳汇能力比1990年下降了10.23%,而同期徐州整体植被碳汇能力相对稳定;3)煤炭开采活动影响区域生态类型,水域负碳汇影响大幅度增强,贾汪区水域负碳汇量以3.51%的速度逐年递增,累计增幅达73.79%,而同期徐州水域负碳汇则整体减少;4)水域面积和建设面积在开采期单调增加,在大量煤矿闭矿后碳汇衰减趋势并未减弱,水域负碳汇量仍然呈上升趋势.在1990—2000年的贾汪区煤矿扩产阶段及2000—2010年的煤矿陆续闭矿阶段,贾汪区年植被-土壤碳汇量分别减少4.10%和6.39%,年水域负碳汇量分别增加55.33%和11.89%.
The calculation models of the greenhouse effect potential of gas carbon source and carbon sink of regional ecosystem were established respectively.The greenhouse effect potential of gas carbon source per ton coal in China and the total greenhouse effect potential of carbon source in Jiawang mining area,Xuzhou,were estimated according to the gas emission and utilization data of China＇s coal industry.Moreover,the carbon source and carbon sink effects formed in coal mining process in Jiawang from 1990 to 2010were investigated combined withthe land utilization data in Jiawang and Xuzhou.The study considers that the greenhouse effect of gas source is obvious during the coal mining process;the vegetation-soil carbon sink decreases annually while the negative water carbon sink in the study area increases year by year,and both variation trends continue with the reduction of coal production.The research results show that：1）The coal-mine gas is one of the major carbon sources in the study area,the greenhouse effect potential per ton coal in China is estimated as 108.11 kg CO2equivalently,and the total greenhouse effect potential in Jiawang is 1 267.90 kiloton CO2equivalently,which reaches 67.66% of the regional vegetation-soil carbon sink（1 874.90 kiloton CO2equivalently）in research period.2）The carbon sink capability is apparently weakened due to the coal mining activities,and the annual vegetation-soil carbon sink is decreased by 10.23% in Jiawang from 1990to2010,while that of Xuzhou is stable in the same period.3）Coal mining activities have influences on regional ecological types,and the effects on negative carbon sink are greatly enhanced.The negative carbon sink in water area is increased by 3.51% yearly,and the total increment reaches 73.79%in Jiawang,contrary to the overall declining trend in Xuzhou.4）Water area and construction area increase monotonically in the mining process,however,the decay trend of carbon sink is not weakened after a great number of mines closing,and an upward trend still exists in the negative carbon sink of water area.During the period of coal mine expansion from 1990 to 2000and the subsequent closure of coal mines from 2000 to 2010,the annual vegetation-soil carbon sink in Jiawang area is decreased by 4.10% and 6.39%,while the annual negative water carbon sink is increased by 55.33% and 11.89%respectively.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2017年第2期415-422,共8页
Journal of China University of Mining & Technology
基金
国家科技基础性工作专项(2014FY110800)
国家自然科学基金项目(51374208)
关键词
煤炭开采
瓦斯碳源
土壤碳汇
碳收支
贾汪矿区
coal mining
gas carbon source
soil carbon sink
carbon budget
Jiawang mining area
