泰山区地表温度及植被覆盖度的关系分析

为研究泰山区城市热岛状况与植被覆盖度之间的关系,本文基于Landsat OLI数据,通过辐射传输方程法对泰山区2009年和2018年地表温度进行反演,同时利用NDVI结合像元二分模型,计算泰山区植被覆盖度,得到泰山区植被覆盖的空间分布格局,在此基础上分析地表温度与植被覆盖度的关系。研究结果表明:泰山区2009年地表温度最低为14.913℃,最高为40.169℃,平均值为27.540℃,2018年地表温度最低为16.745℃,最高为42.798℃,平均值为28.689℃,城市热岛效应增强,地温分布呈现“北低南高”的空间分布格局;泰山区植被覆盖度在-0.114至1.065的范围内,植被可以有效地控制地表温度上升,此外,下垫面性质、人为因素等也会对地温产生多重影响;中部老城区地表温度普遍高于新开发城区,未来城区热环境向低温、健康方向发展。

For the study of Taishan district urban heat island and vegetation coverage,the relationship between the based on t he Landsat OLI data,t hrough t he r adiative tr ansfer equation method for Taishan district in 2009 and 2018,land surface temperature inversion,at the same time using the NDVI as binary model,calculation of Taishan district of vegetation coverage,get Taishan district spatial distribution pattern of vegetation coverage,on the basis of the analysis of the surface temperature and vegetation coverage.The results showed that the lowest surface temperature in Taishan district in 2009 was 14.913℃,the highest 40.169℃,and the average value was 27.540℃.The lowest surface temperature in 2018 was 16.745℃,the highest 42.798℃,and the average value was 28.689℃.Vegetation can effectively control the rise of the surface temperature,the nature of the underlying surface and human factors will also have multiple effects on the surface temperature.The surface temperature of the old city in central area is generally higher than that of the newly developed city.In the future,the thermal environment of the city will develop in the direction of low temperature and health.