西安市景观格局与城市热岛效应的耦合关系

发布时间：2018-01-31 05:39

本文关键词： 西安市景观格局温度归一化热岛预测　出处：《应用生态学报》2017年08期 　论文类型：期刊论文

【摘要】：基于西安市2000、2006和2015年3期遥感数据,进行景观分类和温度反演,建立两者的回归模型,探讨景观格局对城市热岛效应的影响及预测作用.结果表明:不同尺度上的景观格局指数与温度具有不同的相关性,在景观尺度上,景观形状指数(LSI)、景观分割指数(DIVISION)和Shannon多样性指数(SHDI)与温度显著相关;在类型尺度上,CA_1、PD_1、LSI_1、AI_1、LPI_2、AI_2、CA_3、DIVISION_3、LPI_3、AI_4(其中,1代表建设用地、2代表耕地、3代表林地、4代表草地;CA指斑块类型面积,PD指斑块密度,LSI指景观形状指数,AI指聚集指数,DIVISION指景观分割指数,LPI指最大斑块指数)与温度显著相关.景观格局是影响热岛效应的主要因子,对城市热岛效应响应明显.部分景观指数可以表征地表温度,合理的景观配置对缓解城市热岛效应具有长远意义.通过不同尺度上建立的多元线性回归模型预测,2030年的热岛效应同比2015年有所回落,但减幅不明显,依旧强于2006年的热岛状况.热岛效应先由主城区蔓延,以点向面扩展,随后主城区呈现减弱趋势,而周围区(县)热岛出现明显增幅.
[Abstract]:Based on the three issues of remote sensing data of Xi'an in 2006 and 2015, the landscape classification and temperature inversion were carried out, and the regression models were established. The influence of landscape pattern on urban heat island effect and its predictive effect were discussed. The results showed that the landscape pattern index had different correlation with temperature on different scales, and the landscape shape index was LSI on landscape scale. Landscape division index (DIVISION) and Shannon diversity index (SHDI) were significantly correlated with temperature. On a type scale, the number of LSIs will be one, and the number of LSIs will be one, one, one, one, one, one, one year, one, one, one, one, one, one, one, one, one, one, one, one, one, one, one, one, one, one, one, one, one, one, one, one, one, one. 1 for construction land, 2 for cultivated land, 3 for forest land and 4 for grassland; CA refers to patch type area and PD refers to patch density and LSI means landscape shape index AI means aggregation index and division index. The landscape pattern is the main factor affecting the heat island effect, and the response to the urban heat island effect is obvious. Some landscape indices can represent the surface temperature. Reasonable landscape allocation is of long-term significance to alleviate the urban heat island effect. According to the multiple linear regression model established on different scales, the heat island effect in 2030 is lower than 2015. However, the decrease is not obvious and is still stronger than the heat island condition in 2006. The heat island effect spreads from the main urban area to the point to the surface, then the main urban area shows a weakening trend, while the surrounding area (county) heat island increases obviously.
【作者单位】：长安大学地球科学与资源学院/土地工程学院;
【基金】：国家自然科学基金项目(31670549,31170664) 陕西省重点科技创新团队计划项目(2016KCT-23) 中央高校基金项目(310827172007)资助~~
【分类号】：P901;X16
【正文快照】： 近年来,随着西部大开发和西安建设国际化大都市战略的推进,西安市经济快速发展,城镇建设规模急剧扩大,城市景观格局发生了巨大变化;而城市化导致的诸如城市交通、环境污染、居住等问题日益突出,在一定程度上影响了城市景观所提供的生态、经济和社会功能,给城市的可持续发展带

【参考文献】