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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%.
Based on the gas emission data of coal mine, the greenhouse potential energy value of methane carbon source of China’s mined coal and the carbon potential of greenhouse gas of Jiawang mine in Xuzhou were estimated. Combining with the land use data, the carbon source / sink effect of coal mining in Jiawang from 1990 to 2010 was studied. It is concluded that the greenhouse effect of methane carbon source is obvious during the process of coal mining, the vegetation carbon sequestration in the study area is decreasing year by year, The negative carbon sinks in the water area have been increasing year by year, and these two trends continue with the decrease of coal mine production.The results show that: 1) Coal mine gas is one of the main carbon sources in the study area, and the greenhouse gas potential potential 108.11kg CO_2 equivalent. During the study period, the total greenhouse gas potential potential of methane carbon in Jiawang District was 1,267,900 tons of CO 2 equivalent, accounting for 67.66% of the total amount of 18,749,000 tons of vegetation-soil carbon sequestration in the same period. 2) Coal mining activity weakened the regional ecosystem System of carbon sink capacity, Jiawang District 2010 vegetation-carbon sink capacity decreased by 10.23% over 1990, while the overall vegetation carbon sink capacity over the same period Xuzhou relatively stable; 3) coal mining activity The negative carbon sequestration in the waters of Jiawang District increased by 3.51% year-on-year, with a cumulative increase of 73.79%, while the negative carbon sequestration in Xuzhou waters decreased overall; 4) The water area The area and the construction area increased monotonously during the mining period, the decay of carbon sink did not decrease after the closure of a large number of coal mines, and the negative carbon sink in the water area was still on the upward trend.In 1990-2000, In 2010, coal mines closed in succession, Jiawang District annual vegetation - soil carbon sinks decreased by 4.10% and 6.39% respectively, the annual negative carbon sinks increased 55.33% and 11.89% respectively.