Abstract:

In order to better understand the significances of river corridors in urban landscape ecology, the spatial clustering characteristics of landscape type diversity and landscape pattern of Qionglai city were calculated. Results showed as follows. (1) The local spatial autocorrelation index GetisOrd Gi* displayed that high value clustering areas of the landscape type diversity scattered all over the study area, which accounted for 506% of the total area of Qionglai city. The distribution of the hot spot areas was similar to the spatial pattern of the rivers. (2) The buffer area of the river corridors were mainly farmland and forests, and the average patch area of forests was larger. While the buffer area of the road corridors were mainly the farmland and building land, and the overall landscape was more fragmentized. River corridors were more directly adjacent to farmland and forests, while the road corridors were more directly adjacent to farmland and building land. (3) The terrain factor impacted on the landscape pattern in mountainous areas of the west region of Qionglai, where the hot spot areas of landscape type diversity scattered mainly in river terraces. Thus, the city river corridors play a positive role in the landscape diversity of Qionglai. Protecting the landscape diversity of river corridors and strengthening the connectivity of the river and forest, are the main means to protect the ecological functions of river corridors in Qionglai