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首页> 外文期刊>Landscape and Urban Planning >Spatial scaling of urban impervious surfaces across evolving landscapes: From cities to urban regions
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Spatial scaling of urban impervious surfaces across evolving landscapes: From cities to urban regions

机译：城市不透水表面的空间缩放横跨发展景观：从城市到城市地区

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Urban impervious surfaces (UIS) influence the structure and function of urban systems, and are widely considered a key indicator of urban environmental conditions. However, the amount and pattern of UIS both change with spatial scale, which complicates the computation and interpretation of UIS as an indicator. A better understanding of the spatial scaling relations of UIS is needed to resolve this predicament. Thus, the main objective of this study was to explore how UIS would change with increasing spatial extent and population size across urban hierarchical levels, using data from the three largest urban agglomerations in China. In addition, a comparative analysis of six world metropolitan regions was conducted to test the generality of the UIS scaling relations. Scalograms and standardized major axis regression were used to investigate the scaling relations with respect to spatial extent and city size, respectively. Our major findings include: (1) the total amount of UIS increased, whereas the percentage of UIS decreased, in a staircase-like fashion when the spatial extent of analysis expanded from within a local city to the entire urban agglomeration; (2) the spatial scaling of UIS followed a rather consistent and tight power law function within a local city, but became less consistent and less tight beyond a local city; (3) the scaling relations of the total amount of UIS were more consistent than those of the percentage of UIS, and the total amount of UIS scaled more tightly with urban area than with urban population size. These findings shed new light on the scale dependence of UIS, suggesting that a multiscale approach should be adopted for quantifying UIS and for using it as an urban environmental indicator.
机译：城市不受欢迎的表面（UIS）影响城市系统的结构和功能，并广泛地考虑了城市环境条件的关键指标。然而，UIS的数量和模式与空间尺度变化，使UIS作为指标的计算和解释使UIS复杂化。需要更好地理解UIS的空间缩放关系来解决这个困境。因此，本研究的主要目标是探讨UIS如何随着城市分层水平的增加，利用来自中国三大城市集群的数据而增加的空间范围和人口规模。此外，对六届世界大都市区进行了比较分析，以测试UIS扩大关系的一般性。缩放和标准化的主要轴回归分别用于分别研究了空间范围和城市规模的扩展关系。我们的主要调查结果包括：（1）UI的总量增加，而UI的百分比减少，以楼梯状况在当地城市内部扩展到整个城市集群的空间范围内; （2）UIS的空间缩放遵循当地城市内相当一致而紧张的电力法，但在当地城市之外变得不那么一致，更严重; （3）UIS总量的扩大关系比UI的百分比更加一致，UIS的总量与城市地区更紧密地比城市人口规模更紧张。这些调查结果阐述了UI的规模依赖性的新光，这表明应采用多尺度方法来量化UIS并将其用作城市环境指标。

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