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Corresponding Author

张春会zhang chun hui

Abstract

In order to predict the purification effect of planted soil green belt on urban road runoff pollutants, a mathematical model of pollutant migration in planted soil with rainwater infiltration was established based on the principle of mass conservation by considering the infiltration of rainwater into the planted soil as a one-dimensional seepage and pollutant migration process. Combined with the working conditions of the lower boundary of the planted soil green belt, the simplified processing method of the lower boundary of the model was proposed, and then the prediction model of the planted soil green belt for purifying road runoff rainwater was given. The model was used to predict the purification effect of planted soil green belt on road runoff rainwater at different rainfall durations, and the main conclusions are as follows: ① The water purification performance of planted soil green belt predicted by the model is basically the same as the experimental results, and the model is reasonable, which provides a method for the assessment of the water purification performance of planted soil green belt; ② Increasing the thickness of the planted soil can effectively increase the purification effect of the planted soil on the pollutants in the road runoff rainwater. When the thickness of the planted soil is increased from 60 cm to 80 cm, the purification effect of planted soil on chemical oxygen demand (COD) and suspended solids (SS) increases by 62.2% and 69.4%, respectively.

Publication Date

6-18-2022

DOI

10.14048/j.issn.1671-2579.2022.03.002

First Page

11

Last Page

14

Submission Date

May 2025

Reference

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