摘    要随着城市化进程不断加快，以城市热岛效应为主要影响的城市环境的劣化现象日益严重。城市绿地作为城市生态系统中提供能量和物质基础的重要成分，在调节城市气候、保持生态平衡中有着关键作用。本文以杭州八大主城区作为主要研究区，基于Landsat 8数据、辅以MODIS水汽产品数据估算地表温度，基于Fragstats软件完成景观格局分析，分析地表温度与城市绿地景观格局的相关关系，以期提出合理的绿地景观规划来增强绿地的降温效应。结果表明：（1）建筑物地表温度均值远高于林地、草地等其它地类影响下的地温，表明绿地等对于城市有一定的降温效果，建筑密集区则有着相反的作用，表现出城市热岛效应；（2）各样区绿地面积均大于零，表明均含有绿地斑块；林地和建筑物两类典型样区的景观多样性相对较低。林地样区的绿地分维数与景观破碎度相对其它地类较小，斑块规则完整且绿地面积最大。建筑物样区景观破碎度指数与绿地分维数较高，绿地斑块形态复杂，连通性不强，受到人为干扰影响大；（3）地表温度与景观破碎度、绿地分维数呈显著正相关，与绿地面积呈显著负相关，与景观多样性数值无显著相关关系。由此表明，城市景观类型的丰富度对地表温度没有明显的影响；可通过降低城市景观破碎程度，保证不同类景观的连通完整性，降低绿地景观的边界复杂程度，适当增大绿地面积，对城市地表具有一定的降温作用，可缓解城市热岛效应。90032

毕业论文关键词：地表温度; 景观格局; 多源遥感; 杭州市

Abstract: With the process of urbanization accelerating, the urban heat island effect as the main impact of the deterioration of the urban environment is becoming increasingly serious。 As an important component of energy and material basis in urban ecosystems, urban green space plays a key role in regulating climate and maintaining ecological balance。 This thesis takes Hangzhou city as the study area。 Landsat 8 data and MODIS water vapor product data are used in the process of surface temperature interpretation。 The landscape pattern analysis is carried out based on the Fragstats software, and the correlations between the surface temperature and the landscape pattern of the urban green space are analyzed: (1) The surface temperature in build-up areas is much higher than that under the influence of other land types such as forest land and grassland, which indicates that the green space and water environment for the city have a certain cooling effect, and the building-intensive area has the opposite effect; (2) Among the typical sample areas, the sample area of forest dominant landscape is complete and regular relatively; the persity index and fragmentation index of the other four are perse, and the patches are relatively dispersed。 The fractal degree of landscape and the fractal dimension of green space under the influence of built-up construction are higher than those of other land types, which indicates that the landscape of green space in the construction area is disturbed by human disturbance。 (3) The land surface temperature is positively correlated with the degree of landscape fragmentation and the fractal dimension of green space, negatively correlated with the area of green land, and there is no significant correlation between landscape persity and land surface temperature。 It indicates that, to increase the cooling effect of urban green space, the landscape integrity should be increase, the green border complexity reduced and the total area of green space increased appropriately。

Keyword: surface temperature; landscape pattern; multi-source remote sensing; Hangzhou city

目录

1 引言 5

1。1 城市热岛问题的提出