Relationship between Park Composition, Vegetation Characteristics and Cool Island Effect

Sustainability

卷:10

Yanwen Zhao¹  Guoying Yang¹  Xinjun Wang¹  Haoming Cheng¹  Juan Xi² 

[1] College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China;

[2] Zhou Youguang School of Languages and Cultures, Changzhou University, Changzhou 213022, China;

关键词: parks;    cool island effect;    Landsat-8;    i-Tree Eco;    urban heat island;    land surface temperature;   

DOI  :  10.3390/su10030587

来源: DOAJ

【 摘 要 】

The Land Surface Temperature (LST) of a park is lower than the surrounding environment, and thus the parkland forms a Park Cool Island (PCI). However, more case studies are needed to reveal the relationship between park composition, vegetation characteristic and PCI development. The LST and Land Use/Land Cover (LULC) of 18 different sized parks in Changzhou, China were obtained from Landsat-8 and Mapworld Changzhou data. Then, a sample investigation method was used to calculate vegetation characteristics of these parks by an i-Tree Eco model. In order to reduce the impact from the external environment on PCI, the Temperature Drop Amplitude (TDA) and Temperature Drop Range (TR) inside the parks were analyzed by ArcGIS 9.3. Impact factors were tested by Pearson correlation analysis and curve fit to reveal the relationship between these factors and PCI formation. The result shows that a park area threshold of 1.34 to 17 hectares provides the best PCI effect, that park shape (perimeter/area), Leaf Area Index (LAI), density, tree cover, water cover, and impervious surface cover have significant correlation with PCI development, vegetation health and global climate change affect the PCI development. Advice is proposed to improve and maintain PCI effects.

【 授权许可】

Unknown