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

Sangsefidi, Yousef; Barnes, Austin; Merrifield, Mark; Davani, Hassan

doi:10.1016/j.scs.2023.104914

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

2023
By Sangsefidi, Yousef ; Barnes, Austin ; Merrifield, Mark ; ...
Source: Sustainable Cities and Society, 99, 104914

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Journal Title:

Sustainable Cities and Society
Personal Author:

Sangsefidi, Yousef ; Barnes, Austin ; Merrifield, Mark ; Davani, Hassan

Sangsefidi, Yousef ; Barnes, Austin ; Merrifield, Mark ; Davani, Hassan Less -
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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.
Keywords:

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Civil And Structural Engineering Geography, Planning And Development Renewable Energy, Sustainability And The Environment Transportation
Source:

Sustainable Cities and Society, 99, 104914
DOI:

https://doi.org/10.1016/j.scs.2023.104914
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2210-6707
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PDF
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Elsevier BV
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Journal Article
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https://creativecommons.org/licenses/by/4.0/
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CC BY
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urn:sha256:a14d12b5ff67c3f3e07890700ff356edcc26887f021bcfb7145443a386e10561
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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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