Sea‐level rise (SLR) is expected to compromise coastal wastewater infrastructure (WIS) via groundwater inundation (GWI). We conducted a field‐based study in urban Honolulu, Hawai'i using spring tides as a proxy for future sea levels to quantify the hydrologic connection of WIS. This study focused on two possible pathways: (1) direct GWI of WIS and subsequent discharge into the coastal ocean and (2) indirect inundation of WIS evidenced in storm drains. We used geochemical tracers and emerging organic contaminants (EOCs) to monitor groundwater discharge and its wastewater content. Groundwater discharge and EOCs fluctuated with tides for coastal and canal groundwater and surface water samples, and storm drains, indicating tidally driven GWI and wastewater discharge. This study presents some of the first field‐based evidence for GWI of coastal WIS and demonstrates that SLR is creating additional risks to environmental and human health.

中文翻译：

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海平面上升推动废水泄漏到沿海水域和雨水渠

预计海平面上升（SLR）将通过地下水淹没（GWI）破坏沿海废水基础设施（WIS）。我们在夏威夷檀香山市进行了野外研究，使用春季潮汐作为未来海平面的代名词，以量化WIS的水文联系。这项研究集中在两种可能的途径上：（1）直接将WIS的GWI和随后排放到沿海海洋中，以及（2）在雨水渠中证明WIS的间接淹没。我们使用了地球化学示踪剂和新兴的有机污染物（EOC）来监测地下水排放及其废水含量。沿海和运河地下水和地表水样品以及雨水渠的地下水排放量和EOCs随潮汐而波动，表明潮汐驱动的GWI和废水排放。