| 1987-2015年宁波市不透水面时空变化分析 |
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| 作者姓名： | 包颖 陈海珍 申佩佩 梅元勋 |
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| 作者单位： | 宁波市测绘设计研究院;宁波市遥感应用中心;宁波市阿拉图数字科技中心 |
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| 基金项目： | 宁波市地理国情监测与服务项目(2017-ZDL0012);2017年度宁波市科技局软科学课题(2017A10066)。 |
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| 摘 要： | 全面掌握城市不透水面变化规律和现状,对于城市化进程研究、城市规划发展和生态文明建设等具有重要的意义。以宁波市为研究区,基于1987-2015年的Landsat影像,利用完全约束最小二乘混合像元分解法实现宁波市不透水面信息提取,结果表明:完全约束最小二乘混合像元分解法避免了不透水面丰度出现负值的情况,提取精度较好;近30年宁波市不透水面扩张显著,不透水面面积增长近5倍,扩张速率和强度在2007-2010年达到最大,并逐渐趋于平稳,2007年以前宁波市城市扩张以三江口片和各区县(市)主城区为主,2007年后则以新区经济发展带扩张为主。
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| 关 键 词： | 不透水面 城市化 完全约束最小二乘法 线性混合像元分解 |
Analysis on Temporal and Spatial Variation of Impervious Surface Area in Ningbo During 1987-2015 |
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| Authors: | BAO Ying CHEN Haizhen SHEN Peipei MEI Yuanxun |
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| Institution: | (Ningbo Institute of Surveying and Mapping,Ningbo 315041,China;Ningbo Remote Sensing Application Center,Ningbo 315041,China;Ningbo Alatu Digital Technology Center,Ningbo 315041,China) |
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| Abstract: | It has an important meaning for urbanization processing,urban planning and ecological civilization construction to research the variation of impervious surface area(ISA).Taking Ningbo as study area,ISA were extracted from Landsat images using the complete constrained leastsquares mixed pixel method.The result indicated:the complete constrained least-squares mixed pixel method which avoided the negative values of ISA,was feasible with good accuracies.Meanwhile,ISA exhibited a trend of rapid expansion in Ningbo during 1987-2015,the area of ISA increased by five times.The variation rate and change intensity of ISA reached the maximum value between 2007to 2010,then changed to be steady.The extending areas mainly distributed in Sanjiang area and the other downtown areas before 2007,and the newly developed areas had become the extending regions after 2007. |
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| Keywords: | impervious surface area urbanization complete constrained least-squares method linear spectral mixture analysis |
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