南方丘陵区小城镇热岛效应空间分布研究——以赣州市南康区为例

Research on the Spatial Distribution of the Urban Heat Island Effect of the Small Towns in the Mountain Districts of South China——A Case Study of Nankang District,Ganzhou city

以江西省赣州市南康区为例,采用landsat5 TM影像研究南方丘陵区小城镇热岛效应空间分布的特点.研究表明,由于丘陵地区海拔高度的差异性、城市发展规模和小流域水体性质的空间差异性,使得这一类型地区地表热力空间分布有着明显区别于大流域或平原地区大城市的特点:1.热岛强度明显不如大城市;2.分布于丘陵地带的裸岩和林地表现出了较高的热力性质空间分异;3.同一地区的清洁水体和浑浊水体呈现出明显不同的热力性质空间分布特征,清洁水体平均温度较低,空间变化缓慢,浑浊水体则与之相反.

The Nan Kang district, Ganzhou city, is taken as a case to study the urban heat island effect of the small towns in the mountains district of south China with the data of Landsat5 Tm images. The results show some characteristics of the land surface heat spatial distribution different from those of big cities due to the spatial divergence of the elevation in mountain districts, the city scale and the water properties of small drainage ： 1. the urban heat island intense is lower than that of big city ; 2. the naked rock and wood- land distributing in the mountains appear high spatial divergences of heat field ; 3. There exists obvious differences between the spatial distribution properties of the heat fields of the clean water and muddy water： the clean water has lower average temperature and spatial changing rate, while the muddy water has contrary properties.