Coupling flow and river network topology to assess river connectivity and barrier recovery

Abstract

The application provides a method for coupling flow with river network topology, river system connectivity and barrier recovery evaluation, comprising: obtaining river section information of a target river system; performing Strahler river network classification on each tributary that flows into the main stream of the target river system based on the river section information, and determining the Strahler river network classification result of each river section; performing flow weighting correction on the original river section length based on the normalized length of the river section according to the Strahler river network classification result, the length of each river section in each tributary, and the average flow information of each tributary at the estuary where the tributary flows into the main stream; searching and obtaining the connection path information between different river sections in the target river system; calculating the tree-shaped river system connectivity index of the target river system by using the normalized length of the river section, the connection path information between different river sections, and the barrier situation; and determining the recommended recovery order of each barrier in the target river system by iterative evaluation based on the repair priority index.

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