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An investigation of dust emissions from unpaved surfaces in Taiwan

机译：台湾未铺面灰尘排放的调查

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One of the critical problems in making an effective to control fugitive road dust is to estimate the emission factor accuraely.The apper presents measured results of emission factor at field and in a wind tunnel.For the field study,three unpaved roads in Hsin Chu,Taiwan were tested.For the wind tunnel testing,the tested road dust was also collected from the field.Results of field study indicate that the emission factor of unpaved roads increases with the increasing wind speed,the number of vehicles and the speed of vehicles.It can be predicted as e by the multi-variable regression technique.The fractions of PM_(10) and PM_(2.5) in the TSP reentrained fromthe unpaved roads are 20.6+-12.9% and 2.3+-1.2%,respectivley.The wind tunnel test results show that air acceleration rate and edge effect of the dust surface increase the emission factors considerably.As air acceleration rate increases from 0.1 to 1.5 m/s~2,the emission factor increaes linearly from 1.0*10~(-4) to 7.0*10~(-4) kg/m~2 s.However,test results show no significant effect of air acceleration and edge effect of dust surface on the threshold wind speed of reentrainment.
机译：准确估算排放因子是有效控制短途道路扬尘的关键问题之一。作者介绍了实地和风洞中排放因子的测量结果。为进行实地研究，新竹市有3条未铺设道路台湾进行了测试。在风洞测试中，还从现场收集了被测试的道路扬尘。现场研究结果表明，未铺设道路的排放因子随风速，车辆数量和车辆速度的增加而增加。可以通过多变量回归技术将其预测为e。从未铺设的道路重新夹带的TSP中的PM_（10）和PM_（2.5）的比例分别为20.6 + -12.9％和2.3 + -1.2％。隧道试验结果表明，空气加速速率和粉尘表面的边缘效应使排放因子显着增加。随着空气加速速率从0.1增加到1.5 m / s〜2，排放因子从1.0 * 10〜（-4）线性增加。至7.0 * 10〜（-4）kg / m〜2 s。然而，试验结果表明，空气加速和粉尘表面的边缘效应对再夹带的临界风速没有显着影响。

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