矢量景观指数在资源型城镇景观格局分析中的应用

Application of Vector Landscape Metrics on Landscape Pattern Analysis for Resource-Based Cities

景观方向性是景观空间格局的重要特征,能够反映和影响景观的生态流,对于景观的异质性分析和驱动机制分析等都具有重要意义。该文将两种矢量景观指数PO和VPO应用于通过遥感影像获取的2005年大庆市城镇景观斑块,提取斑块的方向性信息,探讨其形成机理。研究结果表明,以萨尔图、让胡路、红岗区为主的油田开发区,大部分城镇景观的走向是由北向南,建成区景观的塑造主要受到油田建设的影响;以大同镇为中心的农业区景观斑块大多数为东南—西北走向,与油田开发区相比表现出明显的差异,主要特点是面积较小,且分布分散。该研究不仅丰富了矢量景观理论应用领域,而且为揭示资源型城镇景观格局的形成机理提供依据。

Pattern directionality is a key characteristic of landscape pattern.It both reflects and affects ecological flow within the landscape,and is very important for landscape heterogeneity analysis and driving mechanism analysis.The Patch Orientation and Vectorized Patch Orientation landscape pattern metrics which are developed by Shuqing Zhang are applied to extract the directional information of build-up land patches based on the Landsat TM imagery in 2005.The results show that most of the build-up land patches trends are from north to south in the oil development zone centered on Saertu,Ranghulu and Honggang.The shape of build-up landscape is influenced by the built of oil field in a large extent.In contrast,most of the build-up land patches trends in agriculture area centered on Datong are from southeast to northwest or from northwest to southeast.The main characteristics of build-up landscape patches are quite small and distribute quite separately.This study not only develops the application fields of vector landscape pattern theory but also reveals the formulation mechanisms of build-up landscape in resource-based city.