Release Time:2019-03-13  Hits:

Indexed by: Journal Article

Date of Publication: 2018-01-01

Journal: URBAN WATER JOURNAL

Included Journals: SCIE

Volume: 15

Issue: 8

Page Number: 723-731

ISSN: 1573-062X

Key Words: Foul sewer network; multi-objective optimization design; sewer conveyance capacity

Abstract: This paper proposes a new performance index of foul sewer systems, i.e. sewer conveyance capacity (SCC) index, to quantify the surplus capacity for multi-objective optimization design problems. The use of the new SCC index is demonstrated using a hypothetical network and a real-world foul sewer network. Results obtained show clear trade-offs between SCC and the other two objectives considered, i.e., capital and operational costs and greenhouse gas emissions. The results show that the upstream sewers in the system often have a relatively large surplus capacity, while the sewer mains operate close to the design capacity. Moreover, SCC is compared with three common indicators at both individual sewer and system-wide levels. Strong correlations between SCC and other indicators are revealed, implying that SCC is a good representation of system performance and can provide a more comprehensive picture of the foul sewer system performance.