[Structural characteristics and heterogeneity analysis of yard-greenbelts in Shenyang city]

The analysis of the landscape and pattern of yard-greenbelts in Shenyang city indicated that residential greenbelt had the highest green path number, occupying 32.2% of all greenbelt types, but the virescence situation in residential area was the worst because its greenbelt ratio was only 19.5% in average. The average area of all yards was 4.04 hm2, with an average greenbelt of 0.93 hm2, and the green belt ratio was 23% in average that was lower than the standard established by the government. About 62.7% of all yards were lower than 15% in virescence, and 30% of them had a < 13.3% of virescence. Micro-green patch was dominant (over 70%) in Shenyang yard-greenbelts. Landscape diversity index of residential areas was the highest, while that of hospital and army units was the lowest. The dominant degrees of all yard-greenbelt types in the researched 7 districts of the city were obviously different. The dominance of factory greenbelt in Yuhong district was 31.23 times of that in Heping district. The evenness indexes were also very different, the highest in residential greenbelt and the lowest in army unit. The highest fragmentation degree was in residential greenbelt and the lowest in army unit. The fragmentation degrees of old districts, especially in Shenhe district were more serious than the new districts.