生态环境学报2018，Vol.27Issue(1)：87-92,6.DOI:10.16258/j.cnki.1674-5906.2018.01.012
浑善达克沙地大气降尘颗粒物特征研究
Study on Particle Characteristics of Atmospheric Dust Fall in Hunshandake Sandy Land
摘要
Abstract
To discuss the atmospheric dust deposition and the distributing features of particulate matter size or dust control effect of sand-fixing plants is of great significance for evaluating the ecological function of sand-fixing plants in sandy area. In this paper, through collecting the dust samples at different heights (50, 100 and 200 cm) near the ground in Duolun County by use of horizontal flux collector of dust and vertical dust deposition gauge, the atmospheric dust deposition and the distributing features of particulate matter size had been separately measured by use of weighting method and laser granulometry. The results showed that the horizontal dust flux at height of 50, 100, 150 and 200 cm was 327.1, 196.3, 199.6 and 116.4 mg·m-2·h-1, respectively. The vertical dust deposition at height of 50, 100 and 200 cm was 518.6, 270.6 and 34.6 mg·m-2·h-1, respectively. In horizontal dust flux, the particulate matter size was below 2 μm, and the content of fine particulate matter presented an increasing trend with the increase of height. The particulate matter size of vertical dust deposition was in the range of 100~250 μm, with the increase of height, the content of particulate matter at and below 200 μm presented a decreasing trend, while the one above 200 μm presented an increasing trend. The dust deposition of arbor forest was higher than natural grassland. The particulate matter size of atmospheric dust fall intercepted by natural grassland was from 50 μm to 150 μm, while the one was from 150 μm to 250 μm in arbor forest. The research results show that the vertical dust deposition or horizontal dust flux has decreased with the increasing of height, there is obvious distributing difference of particulate matter size, and the dust deposition and the particulate matter size are different from the different sand-fixing plants.关键词
浑善达克沙地/水平沙尘通量/垂直降尘量/降尘粒径/固沙植被Key words
Hunshandake Sandy Land/horizontal dust fall/vertical dust fall/particle size/sand-fixing plants分类
资源环境引用本文复制引用
闫德仁,黄海广,薛博..浑善达克沙地大气降尘颗粒物特征研究[J].生态环境学报,2018,27(1):87-92,6.基金项目
国家自然基金项目(31560239) （31560239）
多伦生态站项目(2016-LYPT-DW-013) （2016-LYPT-DW-013）
