A real-time calculation method and system for geometric parameters and surface flow field of mountain torrent debris flow

Abstract

The application discloses a mountain torrent debris flow geometric parameter and surface flow field real-time calculation method and system, belongs to the geological disaster monitoring technical field, including three core steps: S1: river channel geometric parameter accurate calculation, application principal component analysis determines river channel main shaft, adopts multithread parallel convex hull algorithm to calculate width, realizes high efficiency depth inversion through KDTree space index, utilizes Alpha shape to extract central area shape to estimate flow;S2: surface flow field dynamic analysis, utilizes Delaunay triangulation to construct grid model, enhances microtopographic features based on gradient's terrain shadow rendering, adopts PIV technology to extract surface flow velocity field from continuous terrain shadow;S3: data flow processing and transmission architecture, constructs directed acyclic graph topological structure and double-channel data transmission mechanism.The application solves the real-time and accuracy problem of debris flow monitoring under the complex environment of mountainous area, and the system delay is less than 300 milliseconds, which can provide reliable technical support for mountain torrent debris flow disaster early warning.

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