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申请号:201911068874.X 公开号:CN110852232A 主分类号:G06K9/00
申请人:【中文】河海大学【EN】HOHAI University 申请日:2019.11.05 公开日:2020.02.28
摘要:【中文】本发明公开了一种基于山区河流分级的河岸带植被覆盖度提取方法,包括:获取模型所需山区河流各点的坡度、坡向及其变化率、高程等,进而提取水系特征;对所需山区河流进行分级;采用流域面积对应的边界裁剪预处理后的遥感数据影像,得到整个所需山区河流流域的遥感数据影像;获取各个河段的植被覆盖度,计算所需山区河流的河岸带植被覆盖度;根据流域植被覆盖度多年变化率估计植被覆盖度变化趋势。本发明能够方便迅速地获得山区河流的河岸带植被覆盖度,避免耗费过多人力物力,提高精度,同时能够反映山区河流不同河段的生态环境,属于生态河流评价的重要部分,具有很强的实用性和广泛的适用性。 【EN】The invention discloses a method for extracting vegetation coverage of a river bank based on mountain river classification, which comprises the following steps: acquiring the gradient, the slope direction, the change rate, the elevation and the like of each point of the mountain river required by the model, and further extracting water system characteristics; grading the required mountain river; cutting the preprocessed remote sensing data image by adopting a boundary corresponding to the river basin area to obtain a remote sensing data image of the river basin of the whole needed mountain area; acquiring vegetation coverage of each river section, and calculating the vegetation coverage of the river bank zone of the river in the required mountain area; and estimating the vegetation coverage change trend according to the annual change rate of the vegetation coverage of the drainage basin. The method can conveniently and rapidly obtain the vegetation coverage of the river bank zone of the mountain river, avoid consuming too much manpower and material resources, improve the precision, reflect the ecological environment of different river sections of the mountain river, belong to the important part of ecological river evaluation, and have very strong practicability and wide applicability.
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