摘要
滇池入侵物种--凤眼莲的问题由来已久,已经成为我国入侵物种的典型案例。针对目前暂未有学者用遥感手段对其进行时空动态变化分析,本研究利用连续长时间序列遥感影像,结合影像拼接技术,采用监督分类方法,实现了滇池凤眼莲面积解译提取和蔓延区域的空间分布确定。通过不同时相遥感影像的解译,基于时间序列的统计特性进行变化检测.对滇池凤眼莲近18年来的覆盖面积和种群位置进行时空动态变化分析。研究结果表明,18年来,滇池凤眼莲种群面积前期2000-2011年处于波动变化,后期2012-2017年趋于稳定,空间分布呈现分散-集中-再分散的变化,其主要分布在滇池沿岸地区,特别是滇池外海北部区域,与实际情况相吻合。
The problem of eichhornia crassipes,an invasive species in Dianchi Lake,has been a typical case of invasive species in China. In order to analyze the spatial and temporal dynamic changes of eichhornia crassipes in Dianchi lake, using the continuous long time series remote sensing images, combining the image mosaic technology, and adopting the supervised classification method, we extract its area and determine its location of spatial distribution. Through the interpretation of remote sensing images in different time phase, and change detection based on statistical characteristics of time series. the temporal and spatial dynamic changes of coverage area and population location of eichhornia crassipes in Dianchi lake in the past 18 years has been analyzed. The results of the study show that: in the past 18 years, the population area of the Dianchi eichhornia crassipes fluctuated in the first 2000-2011, and in the later 2012-2017 it tends to be stable. The spatial distribution tends to be decentralized-concentrated-redistribution, which is mainly distributed in the coastal areas of Dianchi, especially in the northern region of the outer sea of Dianchi. which is in accordance with the actual conditions.
作者
蒋明
郭云开
朱佳明
刘海洋
JIANG Ming;GUO Yunkai;ZHU Jiaming;LIU Haiyang(School of Traffic and Transportation Engineering,Changsha University of Science & Technology,Changsha 410014,China;Institute of Surveying and Mapping Remote Sensing Applicution Technology,Changsha University of Science & Technology,Changshu 410076,China)
出处
《遥感信息》
CSCD
北大核心
2019年第3期43-47,共5页
Remote Sensing Information
基金
国家自然科学基金(41671498、41471421)
关键词
时间序列
凤眼莲
滇池
遥感监测
入侵物种
time series
eichhornia crassipes
Dianchi lake
remote sensing monitoring
invasive species
