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Published in: Environmental Management 4/2020

24-07-2020

Experimental Study on the Rainfall-Runoff Responses of Typical Urban Surfaces and Two Green Infrastructures Using Scale-Based Models

Authors: Wen Liu, Qi Feng, Ravinesh C. Deo, Lei Yao, Wei Wei

Published in: Environmental Management | Issue 4/2020

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Abstract

In this study, scale models of typical urban surfaces and two green infrastructures (concave grassland and porous pavement) were constructed, and two simulated rainfall intensities (low intensity was 0.3 mm/min with 25.4 mm depth, and high intensity was 0.6 mm/min with 42.0 mm) were utilized to investigate their runoff responses and the impacts of pervious surface positions and initial soil moisture on the runoff processes. Results indicated that impervious concrete surface exhibited a faster generation of runoff and with a runoff coefficient of 89%. Grassland surface represented that time to runoff was about 25 times than that of the impervious surface and recorded the smallest runoff coefficient of 34 and 53%. Compared with the impervious area, concave grassland was able to effectively delay time to runoff, while the porous pavement was able to significantly reduce runoff discharge and peak flow rate. A high rainfall intensity led to a reduction in time to runoff and an acceleration of runoff discharge and peak flow rate. Pervious surface under the lower side generated runoff at a slower rate, and registered a smaller runoff coefficient compared with the pervious surface under the upper side. The initial soil moisture and time to runoff had a significant negative correlation, and a positive correlation was found between the initial soil moisture and runoff coefficient. These findings facilitate a better understanding of runoff processes of urban surfaces and green infrastructures that may be able to help in better hydrology system design for mitigating urban flooding.

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Literature
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go back to reference Chakravarti A, Jain MK (2014) Experimental invesitigation and modeling of rainfall runoff process. Indian J Sci Technol 7(12):2096–2106CrossRef Chakravarti A, Jain MK (2014) Experimental invesitigation and modeling of rainfall runoff process. Indian J Sci Technol 7(12):2096–2106CrossRef
go back to reference Kellagher R (2000) The Wallingford procedure for Europe: best practice guide to urban drainage modelling. HR Wallingford, Wallingford, UK Kellagher R (2000) The Wallingford procedure for Europe: best practice guide to urban drainage modelling. HR Wallingford, Wallingford, UK
Metadata
Title
Experimental Study on the Rainfall-Runoff Responses of Typical Urban Surfaces and Two Green Infrastructures Using Scale-Based Models
Authors
Wen Liu
Qi Feng
Ravinesh C. Deo
Lei Yao
Wei Wei
Publication date
24-07-2020
Publisher
Springer US
Published in
Environmental Management / Issue 4/2020
Print ISSN: 0364-152X
Electronic ISSN: 1432-1009
DOI
https://doi.org/10.1007/s00267-020-01339-9

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