A method for identifying hydrological characteristics under permafrost degradation influence

CN121682178BActive Publication Date: 2026-06-09HOHAI UNIV

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Patents(China)
Current Assignee / Owner: HOHAI UNIV
Filing Date: 2026-02-10
Publication Date: 2026-06-09

AI Technical Summary

Technical Problem

Existing technologies lack comprehensive diagnostic capabilities for multiple time delays, depths, and parameters when assessing the impact of permafrost on hydrological processes. They are difficult to accurately identify the depth of the main control layer, and the calculations are complex, making it difficult to achieve cross-regional comparisons and operational applications.

Method used

A method for identifying hydrological characteristics under the influence of permafrost degradation is adopted. By acquiring and processing layered soil phase and hydrological flux data, a hydrological response index is constructed. Combined with significance test and normalization mapping, the depth of the main control layer is determined, and standardized spatial products are output.

Benefits of technology

It enables the identification of the coupling relationship between soil phase changes and hydrological fluxes on a multi-year scale, accurately determines the depth of the main control layer, enhances cross-regional comparability and engineering usability, and supports rapid identification and operational applications in the context of permafrost degradation.

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Abstract

The application discloses a kind of methods for identifying hydrological characteristics under the influence of frozen soil degradation, comprising: obtaining layered soil phase data and hydrological flux data and preprocessing;Calculate depth-time lag correlation matrix in multi-year time lag set, and filter out significant depth;On each depth passed the test, with the phase data of the current year as the independent variable, implement single-inflexion-point piecewise regression, and estimate the threshold and post-threshold sensitivity of the depth simultaneously;Normalize and equalize into hydrological response index with time lag, threshold and sensitivity three elements, and determine the main control layer depth with the maximum absolute value of post-threshold sensitivity as the criterion.The application overcomes the defects of existing technology that only reflects thermal state and is difficult to quantify response intensity and identify key depth, realizes the automated and standardized diagnosis of frozen soil-hydrological coupling structure, and can be used for frozen soil degradation monitoring and water resources management in cold regions.

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