<p>The integration of Explainable Artificial Intelligence (XAI) into hydrology and hydrogeology addresses the black-box nature of most machine learning (ML) and deep learning (DL) models, which restricts their interpretability and acceptance. This review provides the first systematic and critical synthesis of XAI applications in hydrology and hydrogeology, covering over 180 peer-reviewed studies published up to 2024, organized across nine domains: (i) evapotranspiration, (ii) glacio-hydrology, (iii) precipitation, (iv) rainfall–runoff, (v) river and streamflow, (vi) sediment transport, (vii) floods and droughts, (viii) water quality, and (ix) groundwater. The review analyzes post-hoc methods like SHAP, LIME, PDP, and ALE, discussing their advantages, disadvantages, and suitability for various hydrological domains. Due to its methodological abundance and ease of use, SHAP has become the most popular. Results indicated that XAI not only advances transparency and trust in AI-based models, but XAI also advances the understanding of physical processes. Remaining difficulties include computational scalability, domain unevenness, and lack of integration with physics-informed models.</p>

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Explainable Artificial Intelligence in Hydrology: A Review

  • Mohammad Zounemat-Kermani,
  • Marwan Kheimi

摘要

The integration of Explainable Artificial Intelligence (XAI) into hydrology and hydrogeology addresses the black-box nature of most machine learning (ML) and deep learning (DL) models, which restricts their interpretability and acceptance. This review provides the first systematic and critical synthesis of XAI applications in hydrology and hydrogeology, covering over 180 peer-reviewed studies published up to 2024, organized across nine domains: (i) evapotranspiration, (ii) glacio-hydrology, (iii) precipitation, (iv) rainfall–runoff, (v) river and streamflow, (vi) sediment transport, (vii) floods and droughts, (viii) water quality, and (ix) groundwater. The review analyzes post-hoc methods like SHAP, LIME, PDP, and ALE, discussing their advantages, disadvantages, and suitability for various hydrological domains. Due to its methodological abundance and ease of use, SHAP has become the most popular. Results indicated that XAI not only advances transparency and trust in AI-based models, but XAI also advances the understanding of physical processes. Remaining difficulties include computational scalability, domain unevenness, and lack of integration with physics-informed models.