Assessment of a landfill methane emission screening method using an unmanned aerial vehicle mounted thermal infrared camera - A field study
Assessment of a landfill methane emission screening method using an unmanned aerial vehicle mounted thermal infrared camera - A field study
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DOI：
10.1016/j.wasman.2018.05.031
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发表时间：
2019-03-15
期刊：
影响因子：
8.1
通讯作者：
Scheutz, C.
中科院分区：
文献类型：
--
作者：
Fjelsted, L.;Christensen, A. G.;Scheutz, C.
在丹麦的两个垃圾填埋场（Hedeland填埋场和Audebo填埋场）进行了现场测试，评估了无人机（UAV）安装的热红外（TIR）相机描绘垃圾填埋气（LFG）排放热点的能力。在两个站点建立了100 m(2)的试验区，并划分了约100个测点。通过4 ~ 5次测量活动，研究了土壤表面温度与土壤烟气排放的关系，以覆盖不同的大气条件以及气压的增加、减少和稳定。对于每个测量活动，获得测试区域的TIR图像，然后使用静态通量室测量每个测点的甲烷（CH4）和二氧化碳（CO2）排放量。同时，记录了地表5厘米和10厘米深度的土壤温度。在Hedeland垃圾填埋场，没有发现LFG排放与地表温度之间的关系。此外，CH4排放量非常有限，平均为0.92-4.52 g CH4 m(-2) d(-1)，并且仅在气压下降的两天内可测量到。来自黑德兰岛的TIR图像没有显示出测试区域有任何显著的温度差异。在Audebo垃圾填埋场，在TIR图像中发现了一个表面温度略高的区域，并且在10 cm深处发现了相同的温度略高的模式。地表温度较高的区域是主要的LFG排放区。Audebo的LFG排放受到气压变化的显著影响，平均CH4排放量分别在111 g m(-2) d（-1）和314 g m(-2) d（-1）之间变化，这取决于气压梯度是增加还是减少。从两个垃圾填埋场的TIR图像中观察到的温差被限制在0.7摄氏度到1.2摄氏度之间。在超过1米(2)的区域内，TIR相机识别排放热点的最小CH4排放量为150克CH(4)m(-2) d（-1）。(C) 2018 Elsevier Ltd.版权所有。
An unmanned aerial vehicle (UAV)-mounted thermal infrared (TIR) camera's ability to delineate landfill gas (LFG) emission hotspots was evaluated in a field test at two Danish landfills (Hedeland landfill and Audebo landfill). At both sites, a test area of 100 m(2) was established and divided into about 100 measuring points. The relationship between LFG emissions and soil surface temperatures were investigated through four to five measuring campaigns, in order to cover different atmospheric conditions along with increasing, decreasing and stable barometric pressure. For each measuring campaign, a TIR image of the test area was obtained followed by the measurement of methane (CH4) and carbon dioxide (CO2) emissions at each measuring point, using a static flux chamber. At the same time, soil temperatures measured on the surface, at 5 cm and 10 cm depths, were registered. At the Hedeland landfill, no relationship was found between LFG emissions and surface temperatures. In addition, CH4 emissions were very limited, on average 0.92-4.52 g CH4 m(-2) d(-1), and only measureable on the two days with decreasing barometric pressure. TIR images from Hedeland did not show any significant temperature differences in the test area. At the Audebo landfill, an area with slightly higher surface temperatures was found in the TIR images, and the same pattern with slightly higher temperatures was found at a depth of 10 cm. The main LFG emissions were found in the area with the higher surface temperatures. LFG emissions at Audebo were influenced significantly by changes in barometric pressure, and the average CH4 emissions varied between 111 g m(-2) d(-1) and 314 g m(-2) d(-1), depending on whether the barometric pressure gradient had increased or decreased, respectively. The temperature differences observed in the TIR images from both landfills were limited to between 0.7 degrees C and 1.2 degrees C. The minimum observable CH4 emission for the TIR camera to identify an emission hotspot was 150 g CH(4 )m(-2) d(-1) from an area of more than 1 m(2). (C) 2018 Elsevier Ltd. All rights reserved.