DOE OSTI · 2555891
High‐Resolution National‐Scale Water Modeling Is Enhanced by Multiscale Differentiable Physics‐Informed Machine Learning
Abstract
Abstract The National Water Model (NWM) is a key tool for flood forecasting, planning, and water management. Key challenges facing the NWM include calibration and parameter regionalization when confronted with big data. We present two novel versions of high‐resolution (∼37 km 2 ) differentiable models (a type of hybrid model): one with implicit, unit‐hydrograph‐style routing and another with explicit Muskingum‐Cunge routing in the river network. The former predicts streamflow at basin outlets whereas the latter presents a discretized product that seamlessly covers rivers in the conterminous United States (CONUS). Both versions use neural networks to provide a multiscale parameterization and process‐based equations to provide a structural backbone, which were trained simultaneously (“end‐to‐end”) on 2,807 basins across the CONUS and evaluated on 4,997 basins. Both versions show great potential to elevate future NWM performance for extensively calibrated as well as ungauged sites: the median daily Nash‐Sutcliffe efficiency of all 4,997 basins is improved to around 0.68 from 0.48 of NWM3.0. As they resolve spatial heterogeneity, both versions greatly improved simulations in the western CONUS and also in the Prairie Pothole Region, a long‐standing modeling challenge. The Muskingum‐Cunge version further improved performance for basins >10,000 km 2 . Overall, our results show how neural‐network‐based parameterizations can improve NWM performance for providing operational flood predictions while maintaining interpretability and multivariate outputs. The modeling system supports the Basic Model Interface (BMI), which allows seamless integration with the next‐generation NWM. We also provide a CONUS‐scale hydrologic data set for further evaluation and use.
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Song, Yalan [Civil and Environmental Engineering The Pennsylvania State University University Park PA USA] (ORCID:000000024722148X), Bindas, Tadd [Civil and Environmental Engineering The Pennsylvania State University University Park PA USA] (ORCID:0000000331596276), Shen, Chaopeng [Civil and Environmental Engineering The Pennsylvania State University University Park PA USA] (ORCID:0000000206851901), Ji, Haoyu [Civil and Environmental Engineering The Pennsylvania State University University Park PA USA] (ORCID:0009000407211385), Knoben, Wouter J. M. [Civil Engineering Schulich School of Engineering University of Calgary Calgary AB Canada] (ORCID:0000000183013787), Lonzarich, Leo [Civil and Environmental Engineering The Pennsylvania State University University Park PA USA] (ORCID:0000000181906928), Clark, Martyn P. [Civil Engineering Schulich School of Engineering University of Calgary Calgary AB Canada] (ORCID:0000000221862625), Liu, Jiangtao [Civil and Environmental Engineering The Pennsylvania State University University Park PA USA] (ORCID:0000000292198354), van Werkhoven, Katie [Research Triangle Institute Research Triangle Park NC USA], Lamont, Sam [Research Triangle Institute Research Triangle Park NC USA], Denno, Matthew [Research Triangle Institute Research Triangle Park NC USA], Pan, Ming [Center for Western Weather and Water Extremes Scripps Institution of Oceanography University of California San Diego La Jolla CA USA] (ORCID:0000000333508719), Yang, Yuan [Center for Western Weather and Water Extremes Scripps Institution of Oceanography University of California San Diego La Jolla CA USA] (ORCID:0000000230305476), Rapp, Jeremy [Earth and Environmental Science Michigan State University East Lansing MI USA], Kumar, Mukesh [Civil, Construction, and Environmental Engineering University of Alabama Tuscaloosa AL USA] (ORCID:0000000171149978), Rahmani, Farshid [Civil and Environmental Engineering The Pennsylvania State University University Park PA USA] (ORCID:0000000192417206), Thébault, Cyril [Civil Engineering Schulich School of Engineering University of Calgary Calgary AB Canada] (ORCID:0000000242590497), Adkins, Richard [Office of Information Technology The University of Alabama Tuscaloosa AL USA], Halgren, James [Alabama Water Institute The University of Alabama Tuscaloosa AL USA], Patel, Trupesh [Alabama Water Institute The University of Alabama Tuscaloosa AL USA] (ORCID:0000000343216699), Patel, Arpita [Alabama Water Institute The University of Alabama Tuscaloosa AL USA], Sawadekar, Kamlesh Arun [Civil and Environmental Engineering The Pennsylvania State University University Park PA USA] (ORCID:0009000290115399), Lawson, Kathryn [Civil and Environmental Engineering The Pennsylvania State University University Park PA USA] (ORCID:0000000300757911). 2025-04-10. High‐Resolution National‐Scale Water Modeling Is Enhanced by Multiscale Differentiable Physics‐Informed Machine Learning. https://doi.org/10.1029/2024wr038928
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