基于车行视角的城市道路中分带景观美景度预测模型构建

发布时间：2018-05-28 08:00

本文选题：南沙区 + 测绘　；参考：《仲恺农业工程学院》2017年硕士论文

【摘要】：我国在城市道路景观评价方面的研究起步较晚。当前相关研究中,研究人员采集的评价样本均基于静态视角,而城市道路主要使用者的观景视角实为行车视角,故两者之间存在偏差;选择的评价对象主要选取其景观效果良好的状态,而非常态下景观效果;对因子量化方面,主要采用人为评分方式,存在主观性与片面性。本研究以广州市南沙区为研究区域,选取30条道路,共70段中分带景观类型为评价对象。现场调研获取各评价对象绿化带宽度、群落结构、植物种类与数量、种植点位置、养护水平等基础数据,提出车行视角下的城市道路景观美景度影响因子,对其进行量化,检验并筛选出与美景度显著相关的景观因子。以12个与美景度呈显著线性相关的影响因子为自变量,以美景度值为因变量,采用逐步筛选法,建立多元线性回归模型。模型显示,群落结构层次及绿化养护水平对美景度贡献最大,大小乔木后退距离次之,绿叶期树种相对密度、以单位面积计算的各层盖度之和也对美景度产生一定贡献,以单位长度计算的各层盖度之和、路面干扰因子的贡献则相对较小,以单位长度计算的乔木层盖度则与美景度之间呈线性负相关。根据模型与实地调研,对南沙区城市道路景观建设提出如下建议:1)营造乔灌草相结合的多层次城市道路景观植物群落;2)合理分配城市道路景观中常绿树种与落叶树种比例;3)合理布置乔灌密度,预留植物生长空间;4)适地适树,以乡土植物为主,丰富植物种类;5)提高城市道路景观绿化养护水平。
[Abstract]:The research on urban road landscape evaluation in China started late. In the current related research, the evaluation samples collected by researchers are based on static perspective, while the view angle of the main users of urban roads is the view of driving, so there is a deviation between the two. The selected evaluation object mainly selects the state of good landscape effect, but not the normal landscape effect. In the aspect of factor quantification, it mainly adopts artificial scoring method, which has subjectivity and one-sidedness. In this study, Nansha District of Guangzhou City was chosen as the study area, 30 roads were selected, and the landscape types in 70 sections were selected as the evaluation objects. The basic data of green belt width, community structure, plant species and quantity, planting location, maintenance level and so on were obtained by field investigation. The landscape factors related to the degree of beauty were examined and screened. A multivariate linear regression model was established with 12 influencing factors which were significantly linearly related to the beauty degree and the beauty degree as the dependent variable. The stepwise screening method was used to establish a multivariate linear regression model. The model showed that the community structure level and the greening conservation level contributed most to the beauty, followed by the retreating distance of the large and small trees, the relative density of tree species in the green leaf period, and the sum of the coverage of each layer in the unit area also contributed to the beauty to a certain extent. The contribution of pavement disturbance factor is relatively small for the sum of coverage of each layer calculated by unit length, and the linear negative correlation between the coverage of Arbor layer and the degree of beauty is found in unit length. Based on model and field research, The following suggestions were put forward for the construction of urban road landscape in Nansha area: 1) to create a multi-level urban road landscape plant community combining tree, shrub and grass) to reasonably allocate the proportion of evergreen and deciduous species in urban road landscape and to arrange the density of tree and irrigation reasonably. Reserved plant growth space (4) suitable for trees, mainly native plants, rich species of plants 5) improve the level of urban road landscape conservation.
【学位授予单位】：仲恺农业工程学院
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：S731.8

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