A method for determining the root density threshold under optimal erosion reduction effect

Abstract

This invention discloses a method for determining the root density threshold under optimal erosion reduction effect, relating to the fields of soil and water conservation and vegetation engineering technology. The method includes: obtaining sediment yield and root density sequences; constructing a fitting model of sediment yield variation with root density using a nonlinear fitting algorithm; detecting abrupt change points using various hydrological abrupt change detection algorithms; constructing an evaluation model including consistency, statistical significance, effect size, and repeatability indicators; calculating a comprehensive score for each candidate abrupt change point; selecting the candidate abrupt change point with the highest comprehensive score as the optimal root density threshold; and verifying the optimal root density threshold using a multiple verification algorithm, outputting the threshold result that passes verification. This method overcomes the shortcomings of relying on experience and lacking unified standards in determining the optimal erosion reduction root density threshold through algorithmic processes and systematic evaluation and verification, achieving automated and objective determination of the root density threshold.

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