Continuous period nitrogen and phosphorus pollution traceability tracing positioning method

Abstract

The invention relates to a continuous period nitrogen and phosphorus pollution traceability tracing positioning method, which relates to the technical field of computer processing, and comprises the following steps: S01, obtaining each monitoring station in a certain area and a directed graph of a mutual influence relationship of each monitoring station, and generating a dynamic distance matrix D in combination with a geographic distance, a water flow speed and a wind power direction; s02, for a target monitoring station i, screening remarkably affected stations according to a dynamic distance threshold Dm to form a set Bi, and taking a sub-graph formed by the set Bi as a related sub-region graph; s03, constructing an accessibility matrix A based on the related sub-region graph, and setting a nitrogen and phosphorus pollution concentration column vector It and a concentration matrix Pt; s04, solving a nitrogen and phosphorus pollution transfer equation Pt = APt-r through singular value decomposition or an iterative least square method, and determining an accessibility matrix A; according to the invention, through fusion of multi-source dynamic parameters, high-sensitivity matrix processing capability and capability of self-adaption to environment change, accurate locking of a pollution source and dynamic tracking of a propagation path are realized.

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