摘要
建立了准好氧填埋模拟装置,对其中心剖面内的填埋气进行网格采样.采用经典统计学和地统计学相结合的方法,研究了剖面内φ(CH4)和φ(CO2)的空间分布及其变异性.结果表明:φ(CH4)和φ(CO2)的变异系数分别为0.64和0.30;剖面内从上到下φ(CH4)和φ(CO2)呈上升趋势,其空间分布均表现出较大的变异性和较强的空间自相关性,且呈各向异性变化,即竖直方向填埋气空间变异性和自相关性均强于水平方向;φ(CH4)的空间分布变化比φ(CO2)更易受填埋场结构的影响,其空间变异性和自相关性均大于φ(CO2).
A semi-aerobic landfill simulating facility was set up, and the landfill gas in its central section sampled with the gridding method. The spatial distribution and variation of CH4 and CO2 in the section were researched using combined geostatistic and classical statistic method. The result showed that the variation coefficient of concentration CH4 and CO2 was 0.64 and 0.30 respectively. From up to down in section, the concentration of CH4 and CO2 had the increasing trend. Their distribution of both gases showed large spatial variation, strong self-correlation and anisotropic variability, i.e. the spatial variability and self correlation in vertical direction were both stronger than that in horizontal direction. The spatial distribution of concentration CH4 was more easily effected than that of CO2 , and its spatial variability and self-correlation were stronger than that of CO2.
出处
《环境科学研究》
EI
CAS
CSCD
北大核心
2006年第5期184-188,共5页
Research of Environmental Sciences
基金
国家自然科学基金资助项目(50508042)
国家高技术研究发展计划(863)项目(2001AA644010)
关键词
空间变异性
地统计学
准好氧
填埋气
spatial variability
geostatlstics
semi-aerobic
landfill gas
