Dynamic evaluation and early warning method of vegetation index for monitoring ecological safety of river basin

By analyzing multi-temporal remote sensing images and ground data, a water-heat stress coupling index was constructed, which solved the problem of vegetation dynamic identification and early warning in watershed ecological security monitoring, realized personalized diagnosis and accurate early warning of the ecosystem, and improved the scientificity and timeliness of watershed ecological management.

CN122135233APending Publication Date: 2026-06-02NORTHWEST INST OF ECO ENVIRONMENT & RESOURCES CAS +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NORTHWEST INST OF ECO ENVIRONMENT & RESOURCES CAS
Filing Date
2026-03-23
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing watershed ecological security monitoring technologies are unable to accurately identify the dynamic evolution of vegetation, cannot distinguish between natural seasonal fluctuations and abnormal ecological changes, ignore the time lag effect of environmental stress and vegetation response, and lack systematic quantification of the complex coupling effect of hydrothermal conditions. This leads to false alarms and missed alarms in the early warning system, and makes it impossible to accurately locate ecologically vulnerable transition zones and risk propagation paths.

Method used

By acquiring multi-temporal remote sensing image data and ground hydrological and meteorological observation data, multispectral vegetation index time series are extracted, seasonal baseline separation and fluctuation direction consistency analysis are performed, a hydrothermal stress coupling index is constructed, stress response delay coefficient and sensitivity coefficient are calculated, a dynamic assessment model of vegetation ecological security is established, ecological security level is generated and spatial gradient analysis is performed to achieve accurate early warning.

Benefits of technology

It breaks through the spatial and temporal limitations of ecological monitoring, enables early detection of ecological problems, achieves personalized diagnosis, accurately locates risk transmission nodes, improves the scientific and forward-looking nature of watershed ecological management, and provides technical support for regional sustainable development.

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Abstract

This invention discloses a dynamic assessment and early warning method for vegetation indices in watershed ecological security monitoring. The method includes: acquiring multi-temporal remote sensing images and surface hydrological and meteorological observation data; performing seasonal baseline separation on the vegetation index time series to accurately identify vegetation degradation and recovery trend segments; combining hydrothermal stress coupling index analysis to quantify the response delay and sensitivity characteristics of vegetation to environmental changes; constructing a dynamic assessment model based on stress response parameters; and identifying ecologically vulnerable transition zones through spatial gradient analysis to generate tiered early warning signals. This invention overcomes the spatiotemporal limitations of traditional monitoring, accurately predicts potential ecological risks, and provides an early intervention window for watershed management departments.
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