硬化地面增强夏季热岛的敏感尺度和预警参数分析

Analysis of landscape scale response mechanism of hardened ground and summer urban heat island and prevention early warning parameters

基于3S技术、高精地图数据、高精温湿测试仪器等,利用Arc GIS,MATLAB,SPSS数据分析平台,定量研究日间硬化地面与热岛的景观尺度响应机制及防控预警参数.结论如下：1）基于核硬面率的概念发现了热岛的尺度敏感性,通过算法构建明确了其测度方法;2）在15 m的半径尺度,核硬面率对热岛增强作用最大;3）相关分析表明,核硬面率与夏季热岛呈正相关,增强作用上午较弱、中午最强、下午较强;4）回归拟合结果显示线性函数最佳,日间平均核硬面率每增加10%,热岛强度增强0.15℃,12∶00-14∶00高温时段达到0.22℃;最后,根据本研究成果和国家相关规定,提出了硬化地面增强夏季热岛的日间和高温时段的双重预警体系和防控预警参数,分黄色、橙色、红色三级.

Based on 3S technology, HD map data, high-precision measuring instrument, etc., using AreGIS, MATLAB, SPSS data analysis platform, the scale response mechanism and the key control parameter, about hardened ground and summer urban heat island （UHI）, was analyzed. Conclusion drawn that： first, the scale sensitivity is founded and measurement algorithm is proposed, under the base of proposed the concept and measurement algorithm of core hardened ground rate; second, the best sensitivity scale radius of core hardened ground rate caused summer UHI is 15 m which enhanced UHI intensity greatest; third, the relationship between hardened ground and summer UHI in daytime is positive, and enhancement showed weaker in the morning, the strongest at noon and stronger in the afternoon; fourth, regression analysis showed that they are in a linear relationship： UHI intensity in the daytime increase 0.15 ℃ and significant time is up to 0.22 ℃ for every 10% increase of the average core hardened ground rate; finally, according to the conclusion and the state regulations, hardened ground warning mechanism and its control parameter for daytime and 12 ： 00-14 ： 00 is proposed, and warning grads are yellow, orange, red.