[1]Ma Jiangang,Wang Liuya,Zhang Chuntao,et al.Migration Characteristics of Microplastics in Three Kinds of Lawn Slope Land Under Multiple Simulated Rainstorm[J].Research of Soil and Water Conservation,2024,31(03):108-114.[doi:10.13869/j.cnki.rswc.2024.03.027]
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
31
Number of periods:
2024 03
Page number:
108-114
Column:
Public date:
2024-04-30
- Title:
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Migration Characteristics of Microplastics in Three Kinds of Lawn Slope Land Under Multiple Simulated Rainstorm
- Author(s):
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Ma Jiangang, Wang Liuya, Zhang Chuntao, Zhao Xuehai
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(1.College of Ecology and Environment, Southwest Forestry University, Kunming 650224, China)
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- Keywords:
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simulated rainstorm; slope lawn; microplastics; rrunoff migration; vertical migration
- CLC:
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S157; X53
- DOI:
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10.13869/j.cnki.rswc.2024.03.027
- Abstract:
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[Objective] Exploring the migration characteristics of microplastics under rainstorm runoff and water infiltration in sloping lawns, providing a basis for estimating the interception of microplastics in lawns and selecting urban lawns. [Methods] The characteristics of microplastic migration with runoff and vertical migration in soil of three kinds of sloping grassland were studied on runoff plots by artificial simulation of multiple rainstorms. [Results] The vast majority of microplastics remained in the grassland. The migration quantity of microplastics changed with the increase and decrease of runoff, but the migration of microplastics in the stable stage of runoff showed a fluctuating downward trend. With the increase of rainfall events, the migration and fluctuation of microplastics decreased significantly. The runoff migration increased with the decrease of microplastic particle size, but there was no difference in the migration of microplastics when the particle size was less than 0.5 mm. The vertical migration depth of microplastics concentrated within 15 cm. With the increase of rainfall, the depth did not increase significantly. The particle size of microplastics with vertical migration was mainly<0.25 mm, and the migration amount below 10 cm was less than 1% of 0—5 cm. The microplastics in 0—5 cm soil leached in the uphill position and enriched in the downhill position. [Conclusion] Short-term rainfall causes less horizontal and vertical migration of microplastics, and the migration of microplastics in white clover grassland is the least, is the most in ryegrass grassland, and the horizontal migration and vertical migration in Bermuda grass are in the middle.