武汉城市扩张对热场时空演变的影响

发布时间：2018-03-01 14:17

本文关键词： 遥感城市扩张热场热岛效应时空演变驱动机制　出处：《地理研究》2016年07期 　论文类型：期刊论文

【摘要】：深入分析城市扩张对城市热场时空分布及演变的影响机制,对探求城市热岛效应缓解对策、改善城市生态环境质量意义重大。基于1987年、1996年、2007年和2013年的Landsat影像反演武汉主城区地表温度、提取不透水面值,定量研究两者的关系,探讨城市建设对城市热场空间分布的影响;采用不透水面和正规化地表温度差值影像动态定量1987-2013年武汉城市扩张对热场时空演变的影响机制。结果表明:1 1987-2013年,武汉不透水面不断增加,城市建设强度加强,城市扩张明显,但是不同时期表现出不同的扩张方向、范围和模式。2城市热岛效应主要发生在相应时期的建成区和武钢工业区,而城市大型水体则表现出明显的"冷廊效应"和"冷岛效应";1987-1996年、1996-2007年和2007-2013年热状况恶化面积分别为382.0 km2、305.1 km2和105.7 km2,热状况总体呈现恶化趋势。3不透水面指数能较好地解释热场空间的异质性,两者回归方程的系数为0.751~0.923,不透水面值每增加0.1,正规化地表温度值会增加0.01~0.02。4城市热状况变化从改良极显著、改良较显著、无变化、恶化较显著到恶化极显著,对应的不透水面差值由小到大,城市扩张和城市建设强度加大对恶化城市热环境和加剧城市热岛扩展作用明显。
[Abstract]:This paper deeply analyzes the influence mechanism of urban expansion on the spatial and temporal distribution and evolution of urban thermal field, and probes into the mitigation countermeasures of urban heat island effect. It is of great significance to improve the quality of urban ecological environment. Based on the Landsat images of 1987, 1996, 2007 and 2007, the surface temperature of the main urban area of Wuhan is retrieved, the impermeable face value is extracted, and the relationship between them is studied quantitatively. The influence of urban construction on the spatial distribution of urban thermal field is discussed, and the influence mechanism of Wuhan urban expansion on the spatial and temporal evolution of thermal field from 1987 to 2013 is quantitatively analyzed by using impermeable surface and normalized surface temperature difference image. The results show that: 1 1987-2013. The impermeable surface of Wuhan is increasing, the intensity of urban construction is strengthened, and the urban expansion is obvious. However, different periods show different directions of expansion. The scope and mode .2 of urban heat island effect mainly occur in the corresponding period of the construction area and Wuhan Iron and Steel Industry Zone. However, urban large water bodies showed obvious "cold corridor effect" and "cold island effect" from 1987 to 1996 and from 1996 to 2007 and from 2007 to 2013, respectively. The deterioration of thermal conditions was 382.0 km2 ~ 305.1 km2 and 105.7 km ~ 2, respectively. To explain the heterogeneity of the thermal field space, The coefficient of the two regression equations is 0.751g / 0.923. For the increase of impermeable face value, the normalized surface surface temperature value will increase by 0.01and 0.02.4. The change of urban heat condition is significant from the improvement, the improvement is significant, the change is no change, the deterioration is significant to the deterioration is extremely significant. The corresponding difference of impermeable surface is from small to large, and urban expansion and urban construction intensity increase the deterioration of the urban thermal environment and the urban heat island expansion.
【作者单位】：湖北大学资源环境学院;区域开发与环境响应湖北省重点实验室;同济大学建筑与城市规划学院;
【基金】：国家自然科学青年基金项目(41401186) 湖北省自然科学基金项目(2014CFB346) 区域开发与环境响应湖北省重点实验室开放基金项目[2015(C)003]
【分类号】：X16;P461

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