海口主城区蓝绿空间时空演变及冷岛效应  

Temporal and spatial evolution of blue-green space and cooling-island effects in the main urban area of Haikou

作　　者：王凤霞[1] 王一丁 严锦濛 任雪宁 赵唐玉玥 葛颂 Wang Fengxia;Wang Yizheng;Yan Jinmeng;Ren Xuening;Zhao Tangyuyue;Ge Song(College of Tourism,Hainan University,Haikou 570225,China)

机构地区：[1]海南大学旅游学院,海南海口570225

出　　处：《海南大学学报（自然科学版）》2023年第1期66-78,共13页Natural Science Journal of Hainan University

基　　金：国家重点研发计划(2019YFD0901300);海南省社会科学界联合会(HNSK(YB)19-09)。

摘　　要：以海口市城区为研究区域,选取2013、2015、2018和2020四个年份的Landsat 8卫星遥感数据,基于最大似然法得到研究区的土地利用分类结果,基于大气校正法得到研究区的地表温度数据,并探讨了蓝绿占比和蓝绿比例等因素对冷岛效应的影响机制.结果表明,2013—2020年:(1)研究区蓝色空间面积基本维持不变,绿色空间面积呈减少趋势,其他空间面积呈增加趋势;(2)研究区低温和次低温等级面积占比呈减少趋势,中温、次高温和高温等级面积占比呈增加趋势,地表温度普遍升高;(3)蓝色空间和蓝绿空间冷岛效应强度呈增强趋势,绿色空间冷岛效应强度呈减弱趋势,不同土地利用类型的冷岛效应强度为:蓝色空间>蓝绿空间>绿色空间;(4)蓝绿空间影响冷岛效应的因素有蓝绿占比和蓝绿比例等,蓝绿占比和蓝绿比例均与冷岛效应呈正相关关系.在城市建设中,最好预留32.6%规划面积的蓝绿空间,同时控制蓝绿比例在0.155∶1左右,在保证最大经济效益的同时,也能极大改善城市的整体热环境,本研究为海口市的旧城改造与新城建设提供了合理方案和有益思索.In the report,the urban area of Haikou City was selected as the study area,the maximum likelihood method was performed,and the Landsat 8 satellite remote sensing data of 2013,2015,2018,and 2020 were analyzed to obtain the land use classification results of the area.The atmospheric correction method was used to obtain the surface temperature of the study area,and the influence mechanism of factors such as blue-green proportion and blue-green ratio on the cooling-island effect was elucidated.The results indicated that from 2013 to 2020,the area of blue space in the area remain basically unchanged,the area of green space decrease,and the area of other spaces increase;the proportion of the low temperature and sub-low temperature grade area decrease,the proportion of the medium temperature,sub-high temperature and high temperature grade area increase,the surface temperature of the area generally increase;the intensity of the cooling-island effects of blue space and blue-green space increase,the intensity of the cooling-island effects of green space decrease,the results of the comparison of the intensity of the cooling-island effects of the different land use types are as follows:blue space>blue-green space>green space;The factors affecting the cooling-island effects of blue-green space include the blue-green proportion and blue-green ratio,and the blue-green proportion and blue-green ratio are both positively correlated with the cooling-island effects.In urban construction,Reserving the blue-green space of the planned area(32.6%)and controlling the blue-green ratio(about 0.155:1)are necessary,which can greatly improve the overall thermal environment of the city and ensuring maximum economic benefits.Our study provides the reasonable plans and useful ideas for the reconstruction of the old city and the construction of the new city in Haikou.

关 键 词：蓝绿空间 冷岛效应强度 蓝绿占比 蓝绿比例 海口 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]