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Big Data and Machine Learning for Hydrology Research: Methods, Applications and Future Directions

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "New Sensors, New Technologies and Machine Learning in Water Sciences".

Deadline for manuscript submissions: 27 August 2026 | Viewed by 2839

Special Issue Editors


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Guest Editor
Department of Rural and Surveying Engineering, Aristotle University of Thessaloniki, Thessaloniki, Greece
Interests: water resources; hydrological modeling; sediment transport; spatial optimization; cellular automata; water distribution systems; machine learning
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Guest Editor Assistant
Department of Rural and Surveying Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
Interests: hydrology; geoinformatics; machine Learning; supervised learning; clustering analysis; GIS; rainfall erosivity; climate change; soil erosion modelling; sediment transport

Special Issue Information

Dear Colleagues,

The science of hydrology is being profoundly transformed by decisive developments in machine learning, driven by the deluge of Big Data and the emergence of powerful tools ranging from random forests to advanced deep learning architectures such as LSTMs and transformers. These technologies offer a host of capabilities, uncovering complex, nonlinear patterns in the water cycle and revolutionizing hydrologic modeling by shifting from traditional physics-based to data-driven approaches. More recently, these two paradigms have increasingly been integrated in complementary ways. Furthermore, the flexibility of advanced ML is helping to blur the boundaries between hydrosystem modeling and management, enabling the development of unified software frameworks for both tasks.

The aim of this Special Issue, “Big Data and Machine Learning for Hydrology Research: Methods, Applications and Future Directions”, is to present the state-of-the-art in this rapidly evolving field. We invite authors to submit high-quality research articles, reviews, and concept papers that demonstrate the innovative application of Big Data and ML in hydrology. We are particularly interested in work that goes beyond prediction to address key challenges related to interpretability, physical consistency, and real-world application.

Topics of interest include, but are not limited to the following:

  1. Novel deep learning architectures (e.g., CNN, LSTM, Transformers) for hydrological forecasting.
  2. Large-sample hydrology studies leveraging benchmark datasets (e.g., CAMELS).
  3. Fusion of multi-source data (remote sensing, IoT, citizen science) in ML models.
  4. Explainable AI (XAI) for interpreting "black box" hydrological models.
  5. Physics-Informed Machine Learning (PIML) and hybrid modeling approaches.
  6. Development and application of Digital Twins for water systems.
  7. ML applications for flood, drought, water quality, and groundwater management.
  8. Uncertainty quantification and management through ML methods.

We welcome contributions from researchers, practitioners, and interdisciplinary teams working at the intersection of hydrology, data science, and engineering. Your work will help showcase the breadth and potential of machine learning in advancing hydrological science and practice.

Prof. Dr. Epaminondas Sidiropoulos
Guest Editor

Dr. Vantas Konstantinos
Guest Editor Assistant

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 250 words) can be sent to the Editorial Office for assessment.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Water is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • machine learning
  • deep learning architectures
  • hydrological forecasting
  • large-sample hydrology studies
  • multi-source data fusion
  • big data
  • explainable AI
  • physics-informed machine learning
  • digital twins in water systems
  • uncertainty quantification

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Published Papers (1 paper)

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Research

35 pages, 5308 KB  
Article
AI-Based Time-Series Ensemble Approach Coupled with a Hydrological Model for Reservoir Storage Prediction in Korea
by Jaeseong Park, Jason Sung-uk Joh, Minha Choi, Taejung Kim, Jaeil Cho and Yangwon Lee
Water 2025, 17(22), 3296; https://doi.org/10.3390/w17223296 - 18 Nov 2025
Cited by 1 | Viewed by 2136
Abstract
In regions like South Korea, erratic seasonal rainfall creates a dual vulnerability for agricultural reservoirs: rapid storage increases during the rainy season risk flooding and structural damage, while insufficient storage during dry periods leads to inadequate irrigation. Accurate reservoir storage prediction is therefore [...] Read more.
In regions like South Korea, erratic seasonal rainfall creates a dual vulnerability for agricultural reservoirs: rapid storage increases during the rainy season risk flooding and structural damage, while insufficient storage during dry periods leads to inadequate irrigation. Accurate reservoir storage prediction is therefore crucial. It enables pre-emptive storage and release planning, ensuring stable reservoir management and efficient water utilization despite unpredictable weather conditions. AI-based prediction offers a solution to the aforementioned challenges. However, previous studies had two key limitations: (1) they could not account for inflow and outflow variables in reservoirs that do not provide these data, and (2) they relied on Recurrent Neural Network (RNN) models with a recursive prediction mechanism, leading to decreased accuracy as the lead time increased. To overcome this, we propose a framework that simulates reservoir inflow and outflow using a rainfall–runoff hydrological model and utilizes these variables as inputs for time-series AI models. We then predict the storage rate using a Bayesian Model Averaging (BMA) ensemble of Long Short-Term Memory (LSTM), Gated Recurrent Unit (GRU), and Temporal Fusion Transformer (TFT) models, which resulted in a substantial accuracy improvement. The Mean Absolute Error (MAEs) for 1-day, 2-day, and 3-day ahead predictions were 0.820%p, 1.339%p, and 1.766%p, respectively, with corresponding correlation coefficients of 0.994, 0.987, and 0.980. This framework maintains high accuracy even as the lead time increases. The proposed framework can predict reservoir storage rates with high accuracy, even for reservoirs characterized by irregular seasonal rainfall patterns and a lack of explicit inflow/outflow data, thus contributing to more effective reservoir operation. Full article
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