| In recent years,China has gradually focused on urban ecological problems.Greenway is a land use type created by people’s subjective initiative with many functions such as ecological protection,recreation and entertainment,Landscape aesthetics and so on.Greenway construction has become an effective way to solve the urban ecological crisis,also there are some problems in the construction,such as ignoring ecological benefits,monotonous landscape,lack of feedback evaluation,etc.Based on the previous research results,this article has studied the urban riverside greenway system and elaborated its concept and characteristics of ecological integrity.On this basis,the evaluation index system of riverside greenway has been constructed,and the weight of each index was calculated by analytic hierarchy process.Then,we got the integrity index.Finally we made a systematic ecological integrity evaluation method successfully.The main research results are as follows:(1)Based on previous studies,the urban riverside greenway system should be a linear composite system formed by the synergy of natural ecosystem and landscape Humanities system in the built-up area of the city with some functions including ecology,recreation,leisure,aesthetics and popular science.The integrity of riverside greenway system means that under the interference of the overall urban environment,the riverside greenway system can keep its complexity and self-organizing ability for a long time and maintain the integrity of its system structure and function.Also it should stay a high level of diversity and continuously supply energy and material for the urban ecosystem to promote the natural progress of the ecological process of the urban system.It is the most important to serve people with ecological products.(2)Combining with the integrity characteristics of urban riverside greenway system,we made indexes C1,C2,C3…Ci were selected from two aspects of system structure and function and reference standard,then we used analytic hierarchy process to get the relative weight Wi and calculated ecological integrity index by P=1/5 wi*P(Ci),which has formed the systematic evaluation method of the ecological integrity of urban riverfront greenway.(3)Taken the Binjiang Greenway in Chengdu as an example to verify the theory.According to the actual situation,we divided the greenway into three sections for ecological integrity analysis and judgment.Among them,the index of ecological integrity was 0.653 in Huahuaxi-Nanmen Bridge section,0.596 in Nanmen Bridge-Xinnanmen Bridge section,0.607 in Xinnanmen Bridge-Jiuyanqiao section.The ecological integrity index of the greenway was 0.619 which has showing a good situation.(4)Based on the results of ecological integrity evaluation,we made a plan to promote Binjiang Greenway including optimizing land use layout,making structure reasonable.Meanwhile we had organized some special plans such as slow-moving systems,public facilities,revetments,plants and landscape sketches to make the greenway optimized. |
