title: [Ecological benefits of greening and related controlling factors in urban residential areas of Hangzhou: a quantitative analysis].
abstract: Based on the 1 m x 1 m high resolution aerial images in 2007 and the 30 m x 30 m Landsat 5 TM images in summer 2007, and with the help of GIS and remote sensing image interpretation, this paper calculated the normalized difference vegetation indices (NDVI) representing the overall ecological benefits of greening as well as the six controlling factors, i.e., multilayer structure height, area ratio of softness to hardness, greening rate, floor area ratio, greening area, and building density, in 30 typical urban residential quarters of west Hangzhou. The contributions of the controlling factors to the ecological benefits of greening as well as the quantitative relationships between the overall ecological benefits and the six controlling factors were analyzed by multiple linear regression and correspondence analysis, and some advises were given for the improvement of the ecological benefits. The contribution rate of the six factors was in the order of multilayer structure height > area ratio of softness to hardness > greening rate > floor area ratio > greening area > building density, and the contribution of multilayer structure height was far greater than that of the others whereas building density had the weakest effect on the ecological benefits. Correspondence analysis was effective in simplifying a complex data table into an intuitive two-dimensional chart, and thus, a potential powerful tool in decision-making for the improvement of ecological benefits of greening in urban residential quarters.
authors: Institute of Urban Planning Engineering and Information Technology, Zhejiang University, Hangzhou 310058, China. weiwuwang@zju.edu.cn
authors: Yong-guang
authors: YG
authors: Sun
authors: Xiu-zhen
authors: XZ
authors: Li
authors: Wen-yong
authors: WY
authors: Guo
authors: Yan-long
authors: YL
authors: He
authors: Yue
authors: Y
authors: Jia
mesh_terms: D002681:China; D002947:Cities; D002958:City Planning; D017753:Ecosystem; D004779:Environment Design; D040362:Geographic Information Systems; D063245:Plant Development; D058998:Remote Sensing Technology