Study On The Evaluation And Optimal Design Of Plant Allocation Models For Urban Road Greening In Taiyuan

Road greening is the "window" of the city,which plays an important role in improving the quality of human settlements.Plant allocation of urban road green space is an important part of urban green space system.It is an important means to improve the ecological environment of the city by strengthening the road greening,optimizing the tree structure of the road greening and the configuration pattern of the greening tree species.This study takes the urban road green trees in Taiyuan as the research object.Based on the investigation of the city's arterial roads,sub arterial roads and branches,a total of 47 Samples.Evaluation of 30 common road greening models using analytic hierarchy process,drawing and analyzing the models with higher score,and optimize the planting patterns of urban road greening plant,finally,sum up several kinds of road greening models suitable for Taiyuan.The main results are as follows:1.According to field research,it is found that 30 families,56 genera,93 species are commonly used in road greening.Includes pinaceae,cupressaceae,totally 4 genera and 9 species of casuarina;34 species of 14 families and 22 genera of deciduous trees;6 families,12 genera and 16 species of defoliate dungarunga;6 families,15 genera and 22 species of sheepberry;4 families,4 genera and 7 species of manzanita and half manzanita;1 specie of vine;4 families,4 genera and 4 species of cover plant.The proportion of trees and shrubs is over 2:1,2.Sum up 30 common patterns of road greening configuration.A total of 8 modes in the middle part of the car,includes 7 models of arbor-shrub-hedge,I model of tree-hedge.A total of 10 modes in both sides,includes 4 models of arbor-shrub-hedge,2 each of trees-shrubs-hedgerow-herb and arbor planting,2 each of arbor-herbaceous and trees-hedges.A total of 9 modes in road tree belt,6 models of arbor planting,2 models of trees and shrubs,1 model of tree-hedge.A total of 3 modes for road greenbelt,includes 2 species of arbor planting,1 each of trees-shrubs,trees-hedges-herb-arbor,shrub-grass-hedgerow.3.30 common patterns were evaluated from four levels,including ecological suitability,community stability,landscape function and growth status and management by analytic hierarchy process.Then draw and analyze the models with higher scores.Including 3 models of the middle car,4 models on both sides of the car,2 models of road tree belt and 3 models of roadside greenbelt,a total of 12 configuration models.4.Points out problems in common models,on the basis of this,put forward several optimization models,11 models of the middle car,8 models on both sides of the car,10 models of road tree belt and 13 models of roadside greenbelt,a total of 42 configuration models for garden designers to refer.