摘要
以2014年东莞市LandsatTM卫星影像为基础,反演地温,结合实地调查数据、气象监测站数据,分析了东莞市植被构成现状,利用温度变化指标值分析比较同一龄组下不同林分以及同一林分不同郁闭度下的降温效果。结果表明,东莞市地表植被中,其它绿地类型面积占比最大,占植被覆盖面积的51.60%,其次是荔枝林(13.16%)、阔叶混交林(11.59%)以及桉树林(10.02%)等;与无植被覆盖地区当天地表平均气温相比,在同一龄组下,荷木的降温效果最佳,温度变化指标值为21.16%;在林分水平一致的前提下,林分的郁闭度不同,产生的降温效果也不一样,郁闭度为0.8及以上时,大多数乔木林降温效果最佳。
The current situation of vegetation composition in Dongguan was analyzed based on Landsat TM satellite image of Dongguan in 2014 and the land surface temperature inversion, combined with field survey data and meteorological monitoring station data, and the cooling effects of different stands in the same age group and different canopy densities in the same stand were investigated by the temperature change index values. The results showed that the largest area of other green space types accounted for 51.60% of the vegetation cover area in Dongguan City, followed by Litchi chinensis forest (13.16%), broad - leaved mixed forest (11.59%) and Eucalyptus robusta forest (10.02%). Compared with the average surface temperature in the area without vegetation cover, the cooling effect of Schima superba was the best in the same age group with the temperature change index value of 21.16%. The cooling effects of stands were different in the same stand level but with different canopy densities. Most of arbor forests had the best cooling effect when the canopy density was 0.8 or above.
作者
苏雅丽
杨燕琼
SU Yali;YANG Yanqiong(Guangdong Forestry Survey and Planning Institute,GuangZhou 510000,China;College of Forestry and Landscape Architecture,South China Agricultural University,Guangzhou 510642,China)
出处
《林业调查规划》
2019年第3期61-66,共6页
Forest Inventory and Planning
基金
广东林业科技计划项目(2012-07)
关键词
植被
林分
遥感
地温反演
降温作用
郁闭度
东莞市
vegetation
forest stand
remote sensing
inversion of land surface temperature
cooling effect
canopy density
Dongguan City
