CAJ | 학술논문

采用地统计学和 GIS 相结合的方法，研究了北京城区24年来2个阶段（1987-2005年，2005-2011年）土壤汞含量的时空变化特征。结果表明，随着能源消费结构的变化，研究区不同时期土壤汞含量发生了明显的变化，随着时间的推移呈现下降的趋势。1987-2005年，由于工厂搬迁、煤改气等措施的大力实施，土壤汞含量呈现明显的下降，从1.291μg/g 减少到0.556μg/g。而2005-2011年，土壤汞含量变化并不显著，从0.556μg/g 减少到0.490μg/g。空间上，从1987年至今，研究区二环内土壤汞含量高值区的范围在不断缩小。从1987年到2005年，二环内土壤汞贫化明显，土壤 Hg 含量下降了1μg/g 以上，Ⅲ级和超Ⅲ级区域面积从142.22 km2，经过18年后减小到53.59 km2。相对于2005年，2011年研究区只有二环内中北部和西南三环区域土壤汞贫化相对较明显，土壤 Hg 含量下降了0.3μg/g 以上，Ⅲ级和超Ⅲ级区域面积经过6年后减小到40.51 km2。
채용지통계학화 GIS 상결합적방법，연구료북경성구24년래2개계단（1987-2005년，2005-2011년）토양홍함량적시공변화특정。결과표명，수착능원소비결구적변화，연구구불동시기토양홍함량발생료명현적변화，수착시간적추이정현하강적추세。1987-2005년，유우공엄반천、매개기등조시적대력실시，토양홍함량정현명현적하강，종1.291μg/g 감소도0.556μg/g。이2005-2011년，토양홍함량변화병불현저，종0.556μg/g 감소도0.490μg/g。공간상，종1987년지금，연구구이배내토양홍함량고치구적범위재불단축소。종1987년도2005년，이배내토양홍빈화명현，토양 Hg 함량하강료1μg/g 이상，Ⅲ급화초Ⅲ급구역면적종142.22 km2，경과18년후감소도53.59 km2。상대우2005년，2011년연구구지유이배내중북부화서남삼배구역토양홍빈화상대교명현，토양 Hg 함량하강료0.3μg/g 이상，Ⅲ급화초Ⅲ급구역면적경과6년후감소도40.51 km2。
Temporal and spatial variability characteristics of soil mercury content in Beijing urban for 24 year in-terval (1987-2011)were evaluated using geostatistics and geographic information system(GIS).Results indi-cate that there is remarkable change that soil mercury content presents obvious decline along with temporal process because of the Energy Consumption Structure’s change of Beijing City.From 1987 to 2005,soil mercury content decreased markedly in the study area mainly because of energetically implementing the measure of facto-ry relocation and Coal to Gas.The average content of soil mercury decreased from 1.291 μg/g to 0.556 μg/g. But there is slight change that soil mercury content decreased from 0.556 μg/g to 0.490 μg/g in the period of 2005-2011.The range of high value area of soil mercury content is reducing within the second ring road of Beijing from 1987 to this day.From 1987 to 2005,soil mercury within the second ring road showed visible de-pletion that soil mercury content decreased by more than 1 μg/g.After 18 years the area of Grade Ⅲ and over Grade Ⅲ standard diminished from 142.22 square kilometers to 53.59 square kilometers.Compared with 2005, only soil mercury in the area of north-central part within the second ring road and southwest within the third ring road has relatively significant depletion in 2011 that soil mercury content decreased by more than 0.3 μg/g. The area of Grade Ⅲ and over Grade Ⅲ standard has diminished to 40.51 square kilometers after 6 years.