River landform unit classification and identification method

Abstract

The invention discloses a river landform unit classification and identification method. The method comprises the following steps: obtaining research data and field survey data of a research river reach and a river landform unit classification table; obtaining a gray interval of the same landform unit; eliminating landform units which do not exist in the research river reach; obtaining remote sensing data images of the research river reach in a dry season, a flat water period and a flood period and covering the research river reach, and carrying out graying processing on the three remote sensing data images; extracting river boundaries on the remote sensing data of the research basin after graying in the dry season, the flat water period and the flood period; obtaining the vegetation coverage degree in the river boundary in the three periods and the vegetation coverage degree in a preset distance range from the corresponding river boundary; according to the three river boundaries and the gray interval of each landform unit, performing rough identification of the landform unit on the research river reach; and carrying out secondary identification on the areas corresponding to the plurality of landform units during rough identification to obtain a final classification result.

Description

technical field [0001] The invention relates to the research technology of river geomorphology units, in particular to a method for classifying and identifying river geomorphology units. Background technique: [0002] In recent years, with the rapid development of urbanization, phenomena such as river channelization and channel division have occurred from time to time, resulting in the destruction of landform units such as shoals and deep pools, the disappearance of floodplains and wetlands along the river, and the diversity of landform units. Lowered, habitats were destroyed. In order to restore the damaged ecological environment, the management department needs to analyze the current geomorphic units and understand the specific situation of the current ecological environment of the river section to carry out targeted restoration, so as to reduce the restoration cost of the river section. [0003] However, with regard to the system of classification and identification of g...

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Problems solved by technology

[0004] Aiming at the above-mentioned deficiencies in the prior art, the classification and identification method of river landform units provided by the present invention solves the problem that it is difficult to accurately evaluate the physical habitat of the entire river when restoring the ecological environment of the river course

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