The Evolution of Landscape Patterns of and Optimization Measures for Urban Core Areas Against the Background of Urbanization： A Case s tudy of YangiingDemonstration Zone

摘要

Studying the urban landscape pattern plays a crucial role in scientific land use and management and in improving the urban ecological environment. In this paper, Auto CAD, Arc GIS, Fragstats, and other software were used to analyze the data of the fourth phase of land use in the core area of Yangling Demonstration Zone. The results showed that:(1) in the core area, the percentage of construction land increased from 18.22% to 61.72%, and the percentage of agricultural land decreased from 58.36% to 11.14%. And the farm land was fragmented, and traffic connectivity was strengthened. The area of garden land was reduced from 251.89 hm2 to 50.38 hm2, and the landscape metric of forest land showed an inverted V-shaped curve.(2) The year 2009 in four phases witnessed the greatest landscape fragmentation, both Edge Density(ED) and Largest Patch Index(LPI) increased, and human interference enhanced the overall landscape complexity. Measures were formulated in terms of clear development goals, optimized al ocation of land resources, effective protection of ecological red lines, and definite ecological responsibility, so as to optimize the urban landscape pattern.