Construction and Application of Ecological Property Evaluation Index System for Urban Parks: A Case Study of Xiamen Urban Parks

提高城市公园生态性是生态城市建设的重要内容，也是现代城市公园的发展方向。基于目前城市公园生态性评价缺乏科学统一的标准，本研究从城市公园生态性内涵出发，采用德尔菲法和层次分析法构建城市公园生态性评价指标体系，并在测定主要生态指标的基础上对厦门市7个公园进行生态性评价。 首先，本文建立了以生态结构的合理性和功能的高效性为准则的城市公园生态性评价指标体系，共涵盖群落结构、景观格局、生态服务功能和园林观赏功能4项19个具体指标，并根据生态性评分划分4个等级，分别代表生态性优（I级）、良（II级）、中等（III级）和较差（IV级）。其次，选择绿量、树种多样性、景观多样性和固碳释氧、滞尘和减噪等特征指标...As an important component of eco-city construction, improving the ecological property of urban parks is the development direction of modern urban parks, however, there is still lack of a valid index system to evaluate ecological property of urban parks. The present study focused on the connotation of ecological property, set up an index system for evaluating ecological property of urban parks with...学位：工学硕士院系专业：海洋与环境学院环境科学与工程系_环境工程学号：2262007115237

Effect of the Construction of Green Belts on the Attenuation of Traffic Noise along the Urban Trunk Roads in Xiamen City

通过对厦门市主干道绿化带种类结构调查以及噪声测定等,分析了厦门市主干道绿化带结构及其减噪效果。结果表明,厦门市主干道绿化带可分为4种结构:单一乔木型、乔木+疏灌木/绿篱型、乔木+密灌木型以及乔木+小乔木+灌木/绿篱型,带宽多在4~10M。厦门市主干道绿化带总体减噪能力为0.93~12.96db,绿化带对交通噪声超标治理率达70%。绿化带减噪能力y(db)与带宽X(M)呈显著的线性关系:y=1.2251X+0.2416(r2=0.8603);绿化带的附加衰减与总衰减亦呈显著正相关:y=0.4535X+0.2698(r2=0.9242),噪声的附加衰减主要受绿化带结构的影响,上述四种结构对噪声附加衰减平均值分别达0.93、2.25、4.43和6.72db。绿化带的宽度和结构均是影响其减噪效果的关键因素。Through site investigation and noise monitoring, the effects of the construction of green belts along the urban trunk roads in Xiamen Island on the attenuation of noise has been studied.The results show that the construction of green belts along the trunk road can be divided into four kinds of types as bellows: type I, single arbor; type II, arbor + shrub; type III, arbor + sub-arbor and type Ⅳ, arbor + sub-arbor + shrub.Their width varied among 4--10 m.The noise-reducing ability (y, dB) of the green belts varied from 0.93 to 12.96 dB with various belt widths (x, m), and can be expressed as following: y=1.2251x+0.2416.Meanwhile the additive attenuation of traffic noise (y, dB) presents a closely linear relationship with the total noise-reducing ability (x, dB) as following: y=0.4535x+0.2698 (R2=0.9242).Meanwhile, the additive attenuation of traffic noise is main affected by the constructions of green belts, which reached 0.93, 2.25, 4.43 and 6.72 dB, respectively for the above four kinds of construction types.It shows that the width and construction of green belts play the same important role to reduce the traffic noise