The invention relates to the technical field of riparian
buffer zone treatment, and particularly discloses a method for reducing runoff
pollution load in a
riparian zone, which comprises the following steps of: forming a
pollutant reduction interval by constructing a micro-step
terrain to adjust a slope surface ratio; calculating a
pollutant concentration gradient and preparing an adsorption material; generating an adsorption replacement path according to the charge polarity and the concentration decline trend, simulating the
pollutant concentration and runoff flow velocity change in a plurality of sections, and generating a pollutant reduction
path diagram; and identifying a reduction efficiency abnormal section through change point detection, optimizing material configuration and structure, and outputting a runoff
pollution reduction result. Through the micro-step structure, runoff
diffusion is guided, a fluid path is regulated and controlled to reduce
erosion risk,
shear force reduction efficiency is quantified, interface stability is improved, functional materials are arranged in a gradient manner, charge transfer and pollutant directional capture are promoted, a multi-stage adsorption path is constructed to enhance response speed, and a
dynamic simulation map is formed by combining flow velocity and concentration change. And evaluation, regulation and control basis is provided for
pollution load reduction.