基于TM遥感影像的广州市城区公园增湿效应研究

选取广州市城区17个公园作为研究对象,分析了公园对周边环境的增湿效应。结果表明,公园周边与公园边界点的空气湿度差随着其远离公园边界距离的增大而增加,且增长趋势逐渐减缓,拟合曲线近似于一条过原点的三次多项式（R2〉0.80）。绿化率大于50%、长宽比接近1的公园,其平均增湿范围和增湿湿度差均与绿地面积存在显著的正线性关系（R2分别为0.94和0.77）。水体面积比例较大或长宽比较大（约≥2）的公园,比同等条件下水体面积较小或长宽比较小的公园（≈1）增湿效果好。

Study on Humidifying Effects of Guangzhou Urban Parks Using TM Remote Sensing Imagery

Seventeen urban parks in Guangzhou were selected as a study area to analyze the humidifying effects surrounding these urban parks.The results showed that the air humidity differences between park surroundings and park boundaries increase as distance away from the park boundary increases with growth trend becoming slower and slower.The fitting curve is similar to a cubic polynomial passing through the origin point.The average humidification ranges and differences of urban parks,whose green areas are larger than 50% and length-width ratios are closely to 1,are both linear related to park green areas（R2 = 0.94 and 0.77,respectively）.Parks with larger proportion of water areas or larger length-width ratios（approximately≥2） have more apparent humidification effects than other parks.