[1]AN Yaqiang,SUN Sanxiang,WANG Guofeng.Research on the Transport Characteristics of Pollutants in Rainfall Runoff on the Underlying Surface with Weak Water Permeability[J].Research of Soil and Water Conservation,2022,29(01):133-139.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
29
Number of periods:
2022 01
Page number:
133-139
Column:
Public date:
2022-02-20
- Title:
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Research on the Transport Characteristics of Pollutants in Rainfall Runoff on the Underlying Surface with Weak Water Permeability
- Author(s):
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AN Yaqiang1,3, SUN Sanxiang1,2,3, WANG Guofeng1,3
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(1.School of Environment and Municipal Engineering, Lanzhou Jiaozhou University, Lanzhou 730070, China; 2. Engineering Research Center of the Comprehensive Use of Water Resources in the Cold and Dry Areas Ministry of Education, Lanzhou Jiaozhou Jiao university, Lanzhou 730070, China; 3.Key Laboratory of Yellow River Water Environment of Gansu Province Lanzhou Jiaotong University, Lanzhou 730070, China)
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- Keywords:
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weak permeability; rainfall runoff; transport model; pollutant load
- CLC:
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X506
- DOI:
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- Abstract:
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In order to study the transport characteristics of pollutants in rain-runoff on the impermeable underlying surface, Lanzhou was selected as a typical city, and based on its rainfall distribution characteristics and non-point source pollution characteristics, a model for the transport of pollutants from the impermeable underlying surface was proposed. Through sampling and testing of natural rainfall runoff under the combination of roof, road surface and other weakly permeable underlying surfaces on the university campus, turbidity, CODcr, TN and TP and other major pollutants concentration changes over time were analyzed, the pollutant correlation was examined, and the model was used to calculate the initial load rate of runoff pollutants. The results show that the concentration of pollutants in the runoff reached the peak while the rainfall runoff on weak permeable surface on campus lasted for 10~20 minutes; while the runoff lasted within 30 minutes, the pollutant load rate of rain runoff turbidity, CODcr, TN and TP could reach 65%~85%. The applicability of runoff pollutant transport model was better, and the pollutants were significantly correlated in the process of rainfall and runoff under the condition of small and medium rainfall.