基于面向对象分类方法和多源遥感数据的龙祥岛区域湿地变化检测

发布时间：2018-01-06 06:29

本文关键词：基于面向对象分类方法和多源遥感数据的龙祥岛区域湿地变化检测　出处：《福建师范大学学报(自然科学版)》2017年03期 　论文类型：期刊论文

【摘要】：利用龙祥岛区域2001年ASTER影像、2013年GF-1影像以及Google Earth影像等辅助数据,基于面向对象分类的方法,建立各地物类型的提取规则,提取出龙祥岛区域湿地-非湿地信息,并基于e Cognition软件对龙祥岛区域湿地进行变化检测,最后利用Excel统计软件作出湿地-非湿地信息面积转移矩阵及面积转移率矩阵.结果表明:2001年ASTER影像分类总体精度为87.42%,Kappa系数为0.84;2013年GF-1影像分类总体精度为90.72%,Kappa系数为0.87.研究区2001-2013年间,湿地总面积减少了4.05%,为1.1 km~2,其中天然湿地(包括永久性河流和滩涂)总面积减少了1.65%,为0.42 km~2,人工湿地(包括淡水养殖场和农用池塘)总面积减少了39.76%,为0.68 km2;非湿地总面积增加了4.71%,为1.1 km~2.人工湿地和天然湿地内部变化情况呈现出不同的状态,天然湿地中,约有3.888 km~2的滩涂面积变为永久性河流,主要变化区域位于研究区的东南部和西北部;而在人工湿地中,约有0.663 km~2的淡水养殖场和0.41 km2的农用池塘变为非湿地,主要变化区域位于龙祥岛本岛及研究区的西南角部分,人工湿地变化的主要原因是人类生产生活进程的加快.
[Abstract]:Using the auxiliary data of 2001 ASTER image, 2013 GF-1 image and Google Earth image in Longxiang Island area, the method of object oriented classification is used. Establish the extraction rules of local material types, extract Longxiang Island Wetland-non-wetland information, and based on e Cognition software to detect the changes of Longxiang Island Wetland. Finally, the information area transfer matrix and the area transfer rate matrix of Wetland and Non-Wetland are made by using Excel statistical software. The results show that the overall accuracy of ASTER image classification in 2001 is 87.42%. Kappa coefficient is 0.84; In 2013, the overall accuracy of GF-1 image classification was 90.72 and the Kappa coefficient was 0.87.The total area of wetland decreased by 4.05% between 2001 and 2013 in the study area. The total area of natural wetlands (including permanent rivers and tidal flats) decreased by 1. 65 to 0. 42 km~2. The total area of constructed wetlands (including freshwater farms and agricultural ponds) decreased by 39.76 to 0.68 km2; The total area of non-wetland increased by 4.71% to 1.1 km 路m ~ (2). The internal changes of artificial wetland and natural wetland showed different states in natural wetland. The tidal flat area of about 3.888 km~2 has been changed into a permanent river, and the main change area is located in the southeast and northwest of the study area. In the constructed wetland, about 0.663 km~2 freshwater farm and 0.41 km2 agricultural pond became non-wetland, the main area of change was located in Longxiang Island and the southwest corner of the study area. The main reason for the change of artificial wetland is the quickening of the process of human production and life.
【作者单位】：福建师范大学地理科学学院;
【基金】：欧盟第七框架项目(IGIT:247608)
【分类号】：P237;TP751
【正文快照】： The internal changes of artificial wetland and natural wetland appears different situation.In naturalwetland,there is about 3.888 km2shallows which turns to permanent river,and the major changearea is located in the southeast and northwest of Longxiang i

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