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Data-driven analysis and integrated modeling of climate change impacts on coastal groundwater and sanitary sewer infrastructure



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Details

  • Journal Title:
    Sustainable Cities and Society
  • Personal Author:
  • NOAA Program & Office:
    Sea Grant
  • Sea Grant Program:
    SCU (Southern California Sea Grant)
  • Description:
    The variation of the coastal groundwater table and the vulnerability of sanitary sewer infrastructure under a changing climate is considered for Imperial Beach (CA, USA) by incorporating the compound impacts of Sea-Level Rise (SLR), groundwater shoaling, and precipitation intensification. For 2 m of SLR, marine inundation is expected to impact only 2% of the urbanized area; however, SLR-driven groundwater shoaling is projected to impact 36% of the subterranean sewer system. Due to GroundWater Infiltration (GWI) and Rainfall-Derived Inflow and Infiltration (RDII), the sanitary sewage flow increases by 21% and 49% during dry- (i.e., consecutive days without precipitation) and wet-weather conditions (i.e., 24-hour rainfall with a 25-year return period), respectively. At SLR = 2 m, defect flows (GWI + RDII) can be elevated by 84% and 120% in dry- and wet-weather conditions, respectively. Such elevated hydraulic loads may place $0.5−$2.7 M additional cost on the collection system and treatment facilities every year. Moreover, pressurized junctions due to the above-mentioned hydraulic loading are likely to expose the community and the environment to raw sewage pollution. By involving structural, hydrological, and hydraulic criteria, a holistic approach is presented and implemented for prioritizing sewer system rehabilitation.
  • Source:
    Sustainable Cities and Society, 99, 104914
  • DOI:
  • ISSN:
    2210-6707
  • Format:
    PDF
  • Publisher:
    Elsevier BV
  • Document Type:
    Journal Article
  • License:
  • Rights Information:
    CC BY
  • Compliance:
    Submitted
  • Main Document Checksum:
    urn:sha256:d57a2fb313f878aabb76f145b9c4e6d89291090d9c8fe97df060ea5604b1f6b7
  • Download URL:
  • File Type:
    Filetype[PDF - 14.37 MB ]
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