| 王爱,聂云飞,孔利利,张瑞.合肥市蓝绿空间对地表温度非线性影响效应研究[J].安徽建筑大学学报,2026,34(1):63-70 |
| 合肥市蓝绿空间对地表温度非线性影响效应研究 |
| Nonlinear Impacts of Blue-Green Space on Land Surface Temperature in Hefei |
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| DOI： |
| 中文关键词: 蓝绿空间 地表温度 XGBoost模型 非线性效应 |
| 英文关键词: blue-green space land surface temperature XGBoost model non-linear effect |
| 基金项目:国家自然科学基金项目（72071066）；教育部人文社会科学研究青年基金项目（20YJC630029）；安徽省自然科学基金项目（2008085MG228）；安徽省高校省级自然科学研究项目（2023AH010020）；安徽建筑大学科研基金项目（JZ201416） |
| 作者 | 单位 | | 王爱 | School of Architecture and Planning,Anhui Jianzhu University,Hefei 230601,China；Anhui Institute of Territorial Spatial Planning and Ecology,Hefei 230601,China | | 聂云飞 | School of Architecture and Planning,Anhui Jianzhu University,Hefei 230601,China | | 孔利利 | School of Architecture and Planning,Anhui Jianzhu University,Hefei 230601,China | | 张瑞 | School of Architecture and Planning,Anhui Jianzhu University,Hefei 230601,China |
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| 中文摘要: |
| 城市蓝绿空间是缓解热岛效应的关键空间要素，探析其对地表温度的作用效应，有助于科学指导城市热环境调控，提升人居环境舒适度。以合肥市主城区为研究区域，基于遥感反演地表温度，选取5个景观指数分析蓝绿空间格局，并采用XGBoost模型解析其与地表温度的非线性关系。结果表明：地表温度呈现“东高西低，南高北低”的空间分异特征；建成密集区高温和次高温集聚，形成城市热岛；绿地与水体等生态区呈中低温斑块分布，共同构成“热岛主导、冷源孤立”的失衡格局。蓝绿空间格局表现为“西部集聚连通，东部破碎离散”特征：西部生态集聚区的绿地与水体集中连片、连通性强，成为城市冷源核心；东部高强度建设区的绿地与水体因开发侵蚀，呈现碎片化分布且连通性差。蓝绿空间对地表温度呈现非线性梯度响应与临界阈值效应，绿色空间以规模优先、形状辅助调控地表温度，蓝色空间则遵循形态主导、规模协同的影响机制。 |
| 英文摘要: |
| Urban blue-green spaces are key spatial elements in mitigating the heat island effect. Analyzing their impact on land surface temperature can provide scientific guidance for regulating the urban thermal environment and improving the comfort of human settlements. Taking the main urban area of Hefei City as the study area, this research retrieves land surface temperature based on remote sensing data, selects five landscape metrics to analyze the spatial pattern of blue-green spaces, and employs the XGBoost model to investigate their nonlinear relationships with land surface temperature. The results indicate that land surface temperature exhibits a spatial differentiation characterized by "higher in the east and lower in the west, higher in the south and lower in the north." High and sub-high temperatures are concentrated in densely built-up areas, forming urban heat islands. Ecological areas such as green spaces and water bodies are distributed as medium- to low-temperature patches, collectively creating an imbalanced pattern of "heat islands dominating with isolated cool sources." The spatial pattern of blue-green spaces shows a feature of "aggregation and connectivity in the west, fragmentation and dispersion in the east." In the western ecological aggregation zone, green spaces and water bodies are concentrated and interconnected, serving as the core urban cool sources. In contrast, in the eastern high-intensity development zone, green spaces and water bodies are fragmented and poorly connected due to developmental encroachment. Blue-green spaces exhibit nonlinear gradient responses and critical threshold effects on land surface temperature. For green spaces, scale takes precedence, with shape playing an auxiliary role in regulating land surface temperature, while for blue spaces, morphological characteristics dominate, with scale acting in a synergistic manner. |
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