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Evaluation of a first‐flush capture and detention tank receiving runoff from an asphalt‐paved road
Author(s) -
Cheng Jing,
Yuan Qingke,
Youngchul Kim
Publication year - 2017
Publication title -
water and environment journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 37
eISSN - 1747-6593
pISSN - 1747-6585
DOI - 10.1111/wej.12258
Subject(s) - surface runoff , first flush , environmental science , stormwater , hydrology (agriculture) , asphalt , detention basin , environmental engineering , engineering , geotechnical engineering , geography , cartography , ecology , biology
In this article, we propose and examine a first‐flush capture and detention tank (FCDT) working as a first flush capture device and pretreatment unit receiving stormwater runoff from an asphalt‐paved road. We design the FCDT to completely capture all the stormwater including a first flush generated by an initial 5 mm effective rainfall depth, and to bypass the exceeding part. According to our analysis based on the data from field monitoring and SWMM simulation for 27 events from April to June, 2015, the tank captured 35% of total runoff, which resulted in catching 74% of the TSS load. The TSS mass detention attained in this study by capturing the first 35% of the total runoff is close to the typical definition of a first flush, and also justifies the need for a first‐flush friendly treatment.