Vegetation ecological environment mutation monitoring method and system

Abstract

The invention discloses a vegetation ecological environment mutation monitoring method and a vegetation ecological environment mutation monitoring system, and the vegetation ecological environment mutation monitoring method comprises the following steps: obtaining an original long-time normalized vegetation index sequence, and reconstructing the original long-time normalized vegetation index sequence to obtain a reconstructed long-time normalized vegetation index sequence; training the original long-time normalized vegetation index sequence, extracting a normalized vegetation index sequence template of typical vegetation, and establishing a vegetation type template library; according to a preset period, carrying out normalized vegetation index short-time sequence segment detection on the reconstructed long-time normalized vegetation index sequence, generating a mutation result, wherein the mutation result comprises mutation and non-mutation; and when the mutation result is mutation, analyzing the normalized vegetation index time sequence of the mutation year in the mutation result by using the vegetation type template library to obtain the mutation reason. Whether vegetation mutation occurs in a monitored area can be judged in time so as to deal with the vegetation mutation in time.

Description

technical field [0001] The present application relates to the technical field of ecological environment monitoring, in particular to a method and system for monitoring sudden changes in vegetation ecological environment. Background technique [0002] Vegetation is the link connecting the atmosphere, water, and soil. It is the core component of the surface ecosystem. At the same time, it is also a natural barrier for ecological security. It plays a very important role in soil and water conservation, climate regulation, and maintaining the stability of the ecosystem. The change of vegetation ecological environment is generally a gradual process. With the development of human society and economy, due to the intensification of human activities, the local ecological environment may undergo drastic changes for a period of time, which will have a huge impact on the local ecological environment. For the environmental protection supervision department, the key monitoring object of th...

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Problems solved by technology

This method takes the maximum value of annual NDVI to analyze the interannual variation trend of NDVI in the study area, directly determines the land use situation of the year by using land data, and cannot accurately determine the sudden change of vegetation in the short term; secondly, this method cannot accurately obtain the change area. Variation features and processes

[0008] At present, the long-term NDVI data set successfully applied to the dynamic monitoring of vegetation is generally used to reveal the vegetation growth status and the change of vegetation coverage, and to study the change trend of vegetation coverage and its relationship with temperature and precipitation. A method aimed at the use of environmental protection supervision departments, low-cost, automatic early warning, and capable of precise and quantitative supervision of large-scale areas

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