基于激光雷达扫描观测的散布点污染源监测

发布时间：2018-03-02 11:14

  本文选题：激光雷达　切入点：扫描观测　出处：《中国环境科学》2017年11期 　论文类型：期刊论文

【摘要】：2015年6月11日在河北省石家庄市组织了一次激光雷达水平扫描观测实验,并通过动态阈值法提取了区域散布污染源的位置及传输路径.结果显示,近地面气溶胶空间分布不均匀,强排放点污染源的污染物水平传输距离可达4km.水平扫描观测模式不受地表类型影响,可以获得高空间分辨率的近地面气溶胶空间分布.不同高度角的测试观测表明,应尽量将观测点设置在区域高点并采用水平方式开展扫描.在污染区域提取环节,可利用代表区域本底大气的能见度来确定消光系数动态阈值,增强对于相对污染程度特征的提取效果.
[Abstract]:In June 11th 2015, a laser radar horizontal scanning observation experiment was conducted in Shijiazhuang City, Hebei Province, and the location and transmission path of regional dispersion sources were extracted by dynamic threshold method. The results show that, The spatial distribution of aerosols near the surface is not uniform, and the horizontal transport distance of pollutants from the source of strong emission points can reach 4km. the horizontal scanning observation model is not affected by the surface type. The spatial distribution of aerosols near the ground with high spatial resolution can be obtained. The measurements at different altitude angles show that the observation points should be set at the high point of the area and scan in a horizontal manner. The dynamic threshold of extinction coefficient can be determined by the visibility representing the background atmosphere of the region, and the extraction effect of the feature of relative pollution degree can be enhanced.
【作者单位】： 中国科学院遥感与数字地球研究所国家环境保护卫星遥感重点实验室;中国科学院大学;河北省环境监测中心站;
【基金】：中国科学院科技服务网络计划(STS)区域重点资助项目(KFJ-STS-QYZD-022) 国家自然科学基金资助项目(41671367) 河北省科技计划资助项目(15273909)
【分类号】：X831
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本文编号：1556283