𝙎𝙩𝙤𝙧𝙢𝙬𝙖𝙩𝙚𝙧 𝙌𝙪𝙖𝙡𝙞𝙩𝙮 𝘾𝙝𝙖𝙧𝙖𝙘𝙩𝙚𝙧𝙞𝙨𝙩𝙞𝙘𝙨 𝙖𝙣𝙙 𝙍𝙚𝙪𝙨𝙚 𝘼𝙣𝙖𝙡𝙮𝙨𝙞𝙨 𝙤𝙛 𝘿𝙞𝙛𝙛𝙚𝙧𝙚𝙣𝙩 𝙐𝙣𝙙𝙚𝙧𝙡𝙮𝙞𝙣𝙜 𝙎𝙪𝙧𝙛𝙖𝙘𝙚𝙨 𝙖𝙩 𝙒𝙖𝙣𝙯𝙝𝙤𝙪 𝙉𝙤𝙧𝙩𝙝 𝙎𝙩𝙖𝙩𝙞𝙤𝙣

Stormwater Quality Characteristics and Reuse Analysis of Different Underlying Surfaces at Wanzhou North Station

Shaochun Yuan (Key Laboratory of Hydraulic and Waterway Engineering of the Ministry of Education, Chongqing Jiaotong University, Chongqing, 400074, China;Chongqing Engineering Technology Research Center for Sponge City Construction, Chongqing, 400020, China)
Ting Li (Key Laboratory of Hydraulic and Waterway Engineering of the Ministry of Education, Chongqing Jiaotong University, Chongqing, 400074, China)
Qingwei Yang (Key Laboratory of Hydraulic and Waterway Engineering of the Ministry of Education, Chongqing Jiaotong University, Chongqing, 400074, China)
Shun You (Key Laboratory of Hydraulic and Waterway Engineering of the Ministry of Education, Chongqing Jiaotong University, Chongqing, 400074, China)
Tao He (Key Laboratory of Hydraulic and Waterway Engineering of the Ministry of Education, Chongqing Jiaotong University, Chongqing, 400074, China)
Bo Lv (Chongqing Engineering Technology Research Center for Sponge City Construction, Chongqing, 400020, China;Chongqing Academy of Science and Technology, Chongqing, 401123, China)

Article ID: 4795

DOI: https://doi.org/10.30564/jees.v4i2.4795

Abstract

In response to the water shortage in Wanzhou North Station (WNS), the authors investigated the stormwater quality characteristics with different underlying surfaces of WNS and carried out stormwater reuse analysis in conjunction with the InfoWorks ICM model. The results show that during heavy, torrential, and moderate rainfall, the road stormwater runoff has the highest concentrations of pollutants, with an average EMC (event mean concentration) value of 206 mg/L for COD. For the square runoff, the average EMC values of COD, SS, TN, and TP are 108 mg/L, 395 mg/L, 2.113 mg/L, and 0.128 mg/L, in comparison, the average EMC values of the corresponding indexes for the roof runoff are 65 mg/L, 212 mg/L, 1.449 mg/L, and 0.086 mg/L, respectively, demonstrating their potential for reuse. The R2 (coefficient of determination) of SS and COD in both roof and square runoff are greater than 0.85, with a good correlation, indicating that SS removal is the key to stormwater purification. InfoWorks ICM analysis shows that the recyclable volume of rainwater from WNS in 2018 is 29,410 m3 , accounting for 61.8% of the total annual rainfall. This study is expected to provide an ideal reference for the stormwater management of public buildings in mountainous areas.

Keywords

Stormwater quality; Underlying surface; Recyclable rainfall; Stormwater utilization

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