基于国产高分卫星遥感数据的现代黄河三角洲入侵植物互花米草监测方法

本文以国产高分一号和高分二号影像为数据源，辅以现场调查数据，发展了一种结合空间位置与决策树分类的互花米草信息提取方法。首先基于互花米草适宜生长于高潮带下部至中潮带下部区域的特点，利用高潮时获取的Landsat 5遥感图像缨帽变换的湿度分量，通过二值化处理和矢量后处理提取现代黄河三角洲互花米草生长的向陆边界，进而对高分图像的互花米草生长区域进行掩膜；基于掩膜后的高分图像，利用决策树分类方法对互花米草分布范围进行提取。通过对现代黄河三角洲互花米草信息提取实验，表明提出的分类方法能够较为精确地识别和提取互花米草信息，总体分类精度达到97.05%。通过对提取的互花米草分布情况的统计和分析，发现整个现代黄河三角洲地区的互花米草总面积约有3278.1100 hm2，主要分布于黄河故道西侧、五号桩、孤东油田东南侧和黄河现行入海口两侧等四个区域，其中黄河现行入海口两侧是2002年之后出现的新生互花米草区域，互花米草面积最广，占现代黄河三角洲互花米草总面积的91.39%；其次为孤东油田东南侧及五号桩，自首次引种互花米草至今都有互花米草分布，所占比例分别为6.22%和1.59%；本文首次在黄河故道西侧发现互花米草，在此前的研究工作中均未报道，互花米草面积最小，约为26.1527 hm2。

Monitoring method of invasive vegetation Spartina alterniflora in modern Yellow River delta based on gf remote sensing data

In this paper, the data source are GF-1 and GF-2 images covering the modern Yellow River delta, we developed a Spartina alterniflora information extraction method which combined the spatial position with decision tree classification.Firstly, based on the characteristics of Spartina alterniflora suitable for growing in the climax with the lower part to middle tidal with the lower region, using humidity component of tasseled cap transform of Landsat 5 remote sensing image acquired in climax, through binarization processing and vector post-processing to extract modern Yellow River delta Spartina alterniflora growth landward boundary, and then mask the Spartina alterniflora growth area of the GF images; Finally, using decision tree classification method to extract growth area of Spartina alterniflora.The experiment shows that the proposed method can more accurately identify and extract Spartina alterniflora information, the overall classification accuracy of 97.05%.By statistics and analysis of the distribution of Spartina alterniflora, we found the whole modern Yellow River delta total area of Spartina alterniflora about 3278.1100 hm2, mainly distributed in the west of previous flow path of the Yellow River, Wuhaozhuang, the southeast side of Gudong oilfield and both sides of the Yellow River current estuary four regions, of which the Spartina alterniflora area of both sides of the current Yellow River estuary is widest, accounting for modern Yellow River delta Spartina alterniflora total area of 91.39%; followed by Gudong oilfield southeast and Wuhaozhuang, the proportion is 6.22% and 1.59%;the area of Spartina alterniflora in the west of previous flow path of the Yellow River is smallest, approximately 26.1527 hm2.