Optimization of the Method of Constructing Ecological Security Pattern with Rapid Urban Expansion

The contradiction between urban development and ecological environment protection is particularly obvious in rapidly expanding areas. It necessary to build a reasonable security pattern. balance expansion security. This paper takes Zhengzhou as an example, based on spatial principal component analysis, comprehensive assessment of carried out by using natural characteristics, human interaction sources are extracted; Based the corridors extracted minimal cumulative resistance (MCR) model, edge-betweenness index used optimize redundant eliminated, first-level nodes corridor extracted. Through experiments, 25 important sources, 24 corridors, 32 were Important constitute basic pattern Zhengzhou, which effectively alleviate rapid protection, ensuring at same time.