International Low Impact Development Conference China 2016
Estimating Water Quality Capture Volume for LID Designs Using a Mechanical Wash-Off Model
Publication: International Low Impact Development Conference China 2016: LID Applications in Sponge City Projects
ABSTRACT
In order to achieve the balance between the effect of pollutant control and the cost of LID construction, the water capture volume should be properly determined. Generally, the water quality capture volume (WQCV) is optimized by using empirical model. In this study, a mechanical wash-off model with one-dimensional kinematic wave equation is calibrated and validated by two rainfall events collected in Shenzhen, China. Then, this model is used to derive the WQCV with the normalized runoff volume and pollutant mass. With a relatively high Nash coefficient in simulating TSS concentration (0.56~0.91), the model draw to the conclusion that the first 55% runoff volume contains 80% pollutants, which is similar to that of empirical model. Therefore, although mechanical model scientifically illustrates the wash-off process, it is reasonable to use empirical model because of the heavy calculation of mechanical model.
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ACKNOWLEDGE
This research was supported by Shenzhen Science and Technology Development Fund Project (ZDSYS20140509094114169). Gratefully acknowledge classmates who involve in rainfall data collection.
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Information & Authors
Information
Published In
International Low Impact Development Conference China 2016: LID Applications in Sponge City Projects
Pages: 118 - 125
Editors: Haifeng Jia, Ph.D., Tsinghua University, Shaw L. Yu, Ph.D., University of Virginia, Robert Traver, Ph.D., Villanova University, Huapeng Qin, Ph.D., Peking University Shenzhen Graduate School, Junqi Li, Ph.D., Beijing University of Civil Engineering and Architecture, and Mike Clar, Ecosite, Inc.
ISBN (Online): 978-0-7844-8104-2
Copyright
© 2017 American Society of Civil Engineers.
History
Published online: Dec 4, 2017
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