基于多源数据的沿海城市扩张及生态环境效应研究  

Coastal Urban Expansion and Its Eco-environmental Effects Using Multi-source Data

作　　者：王振兴 刘东 王敏 于依萍 WANG Zhenxing;LIU Dong;WANG Min;YU Yiping(College of Resources and Environmental,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院大学资源与环境学院,北京100049

出　　处：《地理空间信息》2024年第4期49-53,共5页Geospatial Information

摘　　要：探究沿海城市扩张特征及其生态影响,以青岛市为例,利用多源数据(DMSP/OLS、NPP/VIIRS、MODIS和统计数据),分析了2000—2019年青岛市城市扩张过程及时空演化特征。通过计算植被指数和热岛强度指数,揭示了城市扩张中的生态效应。结果表明近20 a青岛城市建设由沿海向内陆扩展,表现为“核心市区不断扩大,周边乡镇快速兴起”的点面结合发展特征。建成区植被指数整体呈上升趋势,上升区集中于市辖区,下降区主要分布在城市边缘和新兴城镇。城市热岛强度呈增加趋势,强热岛分布在建成区内部,空间范围逐渐增大。灯光指数与热岛效应具有正相关性,城市建成区更加明显,而灯光指数与植被指数没有明显相关性。研究可为青岛市及其他沿海城市的发展提供政策依据。Taking Qingdao for example,we used DMSP/OLS,NPP/VIIRS,MODIS and statistical data from 2000 to 2019 to analyze the urban expansion process and spatio-temporal evolution characteristics,and revealed the ecological effects in the process of urban expansion by calculating the vegetation indexes and heat island intensity.The results showed that during the past 20 years,the built-up area of Qingdao City expanded from the coastal area to the inland area,showing the development characteristics of“the core urban area expanding,and the surrounding towns rapidly rising”.The vegetation indexes of built-up area showed an upward trend,with the increasing area concentrated in the municipal district and the decreasing area mainly distributed in the urban edge and emerging towns.The urban heat island intensity showed an increasing trend and was in the weak heat island state from 2000 to 2019.The strong heat island was distributed in the built-up area with a gradually increase trend.There was a positive correlation between nighttime light index and heat island effect,especially in urban built-up area.There was no significant correlation between nighttime light index and vegetation index.This study can provide policy basis for the development of Qingdao and other coastal cities.

关 键 词：多源数据 城市扩张 生态效应 夜光影像 青岛市 

分 类 号：P208[天文地球—地图制图学与地理信息工程]