Author(s): Xuan Pang; Mingfu Guan

Linked Author(s):

Keywords: Construction activities; Water quality; Blue-Green Infrastructures; Hydrograph characteristics; First flush effect

Abstract: Construction activities along with the resulted runoff cause surface water pollution. This study aims to investigate urban runoff water quality variations under and after construction, as well as urban hydrograph characteristics after construction. In this study, the Anderson Road Quarry Site, Hong Kong SAR is set as a study area. A set of typical Blue-Green Infrastructures (BGIs) are under construction within this site. This study uses hydrological modelling, field monitoring and statistical analysis methods to find out the urban runoff responses to construction works and BGIs under specific subtropical climates. In addition, this study also aims to explore the first flush effect after BGIs implementation and under construction works. Preliminary results show construction works influence water quality by effluent discharges and land disturbance; in addition to construction works, the stormwater runoff water quality is also affected by first flush effect and dilution, which presents an improvement from the upstream station to downstream station.

DOI: https://doi.org/10.3850/978-90-833476-1-5_iahr40wc-p0302-cd

Year: 2023