Study On Evalution And Optimization Of Shanghai Community Green Landscape Pattern

The investigation of the green landscape pattern of community hasimportant practical significance for analyzing the green space distributioncharacteristic and optimization strategy. Ruijing community, Xinchengcommunity, Fangsong community, which was constructed in different timein Shanghai, has been selected to study the green landscape pattern.Through the comparison and analysis of the status of the community greenlandscape and the landscape ecology index including the patch fractaldimension, the aggregation index, fragmentation index, connectivity indexand so, we can study the characteristic of the community green spacedistribution. And with the research of evaluation of the community greenlandscape pattern, we can provide some suggestions for the ecologicalconstruction of the green space in community. The main research resultsare as follows:1.The community green coverage rate of Ruijing community,Xincheng community, Fangsong community are19.86%, 34.77%and35.34%, of which Ruijing community green coverage rateobviously does not meet the green standards of residentialcommunity(30%). The statistical of community area and green patches, thetotal number of greenbelt patches of Ruijing community are398, and itsarea is34.11hm2; the total number of greenbelt patches of Xinchengcommunity are429, its area is63.86hm2; the total number of greenbeltpatches are563,its area is83.36hm2. Overall, the fragmentation degree ofRuijing community green landscape is supreme, and the fragmentationdegree of Fangsong community green landscape is minimum. The result ofanalyzing the patch level and landscape level shows, the proportion of thegreen patch area greater than400m2in3communities are Ruijingcommunity88.9%,Xincheng community94.4%,Fangsong community93.5%. We can find out that the medium and large patches occupy adominant position in3communities.2. The fragmentation index of3communities green landscape isRuijing community0.77, Xincheng community0.45, Fangsongcommunity0.40. The fragmentation degree of Xincheng community andFangsong community green landscape is lower than the Ruijincommunity’s. The contagion index of Ruijin community, Xinchengcommunity and Fangsong community is respectively76.16,69.02and66.14, which shows the Fangsong community green space is well-distributed. The connectivity index of Ruijin community, Xincheng community and Fangsong community is respectively40.07,53.18and70.61, which shows that various types of greenbelt patches are closely inFangsong community.3. The paper evaluates from the layout and function of the communitygreen landscape. By using the combination method of subjective andobjective, we establish the comprehensive evaluation on landscapestructure with the method evaluation and entropy to evaluate the landscapestructure of the3communities. The result of evaluation is Fangsongcommunity＞Xincheng community＞Ruijin community, which showsagreement with the investigated current situation of community greenspace. The combination of evaluation and entropy method can reflects thestatus of3community’s green space more objective.4. Based on the analyzing the landscape pattern and comprehensiveevaluation system of landscape structure of green space in3communities,it shows that there is some problem on the landscape pattern of3community green space. With these problem, we propose someoptimization strategies and construct a model of ecological communitygreen space pattern.