Research On Construction And Evaluation Of Plants Landscape In The Riverfront Green Space Of Zhengzhou City

Riverside green space can connect with scattered green patch together in the urban green space system,which exists the special linear space morphology.It is essential to structure the urban green networks.The plant communities is the important part of the riverside green space.Grasping the features of the plant communities in the riverside green space and establishing the basic foundation database of plant communities in the riverside green space is important to structure riverside green space.Then analyzing the inner link between the plants landscape attributive character of riverside green space and how to build it,which contributes to develop many parts of plant communities in the riverside green space benefits from ecology,landscape,society,culture and so on.Taking 58 representative plant communities units of three riverside green space of Dongfeng canal,Jinshui river,Xionger river in Zhengzhou City as the the research object and doing the field investigation.Then,use the analysis method of plant communities to analyze the content such as the features of community composition and quantity,species,richness,diversity and so on.At the same time,using the analytic hierarchy process(AHP)combined with the comprehensive evaluation index method to carry on the comprehensive evaluation of the selected plant community units and judge the quality of the riverside greenbelt plant landscape level in Zhengzhou city.Through comparing and analyzing the results of the field investigation and evaluation,summarize the problems and discusses optimization advice,in order to provide the reference basis of renovating and constructing riverside greenbelt plant landscape in Zhengzhou City in the future.The results are as follows:1.Of all the 58 investigated community units,there are 123 kinds of plants including 49 families 87 genus and dominant families concentrate on Rosaceae,Oleaceae,Poaceae,Leguminosae,Pinaceae,Cupressaceae,Aceraceae and Liliaceae.The structure of plant community mainly appears as multiple layers and vegetation form mainly appears as broad leaved deciduous forest and mixed broad leaf-conifer forest.2.The diversity of species of riverside green space is at a lower middle level especially the herb layer.The trend of Simpson diversity index is tree layer> shrub layer>herb layer,which is basically in accordance with species richness index.And so as the trend of Pielou evenness index which reflects that the characteristic of artificial green space of using plant type is mainly in trees and shrubs.The otherness among communities are relatively obvious which embodyes the difference between plant communities construction levels caused by riverside surrounding environment and construction period.3.By comparing and screening index,establish a comprehensive evaluation system of green space plant landscape with 3 indicators including environmental,ecological attributes and landscape visual image and perception of recreation behavior and 16 criteria.The weight of ecological environment attribute level maximum value,fully reflects the properties of the riversidegreen space plant landscape ecology is the premise to ensure other function can be exerted.By scoring factors,it is concluded that the comprehensive evaluation index of plant landscape in the riverside green space is 68.59% and grade II,and the level of quality present out the characteristics of the department of good and the overall general.The rank of quality of plant landscape is Jinshui river,Dongfeng canal,Xionger river.In the 58 plant community units,there are 5 of I level,31 of II level,12 of III level,which accounts for 8.62,53.45 and20.69 percent of the total.According to the evaluation results,select five grade I plant community unit to analysis the plant landscape and put forward optimization suggestions,so as to recommend a good plant community model.4.Compare and analysis the results of the investigation and evaluation,it finds that there are many problems existing in the construction process of Zhengzhou city riverside greenbelt plant landscape.For example,the plant species are not enough rich,the animal habitat environment sharply declined,the lack of local characteristics and the recreation experience is not enough good and so on.Aiming at the planning,design and management three aspects to explore optimization suggestions.