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BioRT‐HBV 1.0: A Biogeochemical Reactive Transport Model at the Watershed Scale
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BioRT‐HBV 1.0: A Biogeochemical Reactive Transport Model at the Watershed Scale
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Journal Article
BioRT‐HBV 1.0: A Biogeochemical Reactive Transport Model at the Watershed Scale
2024
Overview
Reactive Transport Models (RTMs) are essential tools for understanding and predicting intertwined ecohydrological and biogeochemical processes on land and in rivers. While traditional RTMs have focused primarily on subsurface processes, recent watershed‐scale RTMs have integrated ecohydrological and biogeochemical interactions between surface and subsurface. These emergent, watershed‐scale RTMs are often spatially explicit and require extensive data, computational power, and computational expertise. There is however a pressing need to create parsimonious models that require minimal data and are accessible to scientists with limited computational background. To that end, we have developed BioRT‐HBV 1.0, a watershed‐scale, hydro‐biogeochemical RTM that builds upon the widely used, bucket‐type HBV model known for its simplicity and minimal data requirements. BioRT‐HBV uses the conceptual structure and hydrology output of HBV to simulate processes including advective solute transport and biogeochemical reactions that depend on reaction thermodynamics and kinetics. These reactions include, for example, chemical weathering, soil respiration, and nutrient transformation. The model uses time series of weather (air temperature, precipitation, and potential evapotranspiration) and initial biogeochemical conditions of subsurface water, soils, and rocks as input, and output times series of reaction rates and solute concentrations in subsurface waters and rivers. This paper presents the model structure and governing equations and demonstrates its utility with examples simulating carbon and nitrogen processes in a headwater catchment. As shown in the examples, BioRT‐HBV can be used to illuminate the dynamics of biogeochemical reactions in the invisible, arduous‐to‐measure subsurface, and their influence on the observed stream or river chemistry and solute export. With its parsimonious structure and easy‐to‐use graphical user interface, BioRT‐HBV can be a useful research tool for users without in‐depth computational training. It can additionally serve as an educational tool that promotes pollination of ideas across disciplines and foster a diverse, equal, and inclusive user community. Plain Language Summary Reactive Transport models (RTMs) are essential tools to understand the movement of water, nutrients and other elements from land to rivers and their interactions with each other. Recent watershed scale RTMs, unlike earlier ones that primarily focus on the subsurface processes, have integrated belowground processes and above‐ground dynamics and characteristics including changing weather and vegetation cover. However, these models require large amount of data and are challenging for users with limited computational background. Here we developed BioRT‐HBV 1.0, a parsimonious, watershed‐scale RTM with a graphical user interface that is comparatively easy to learn and use and requires minimal data. BioRT‐HBV can simulate a wide variety of processes like chemical weathering, carbon and nutrient transformation, soil organic carbon decomposition, among others. Here, we introduce the model structure, its governing equations, and examples that demonstrate the use of model in simulating carbon and nitrogen processes. We put forward this model as a potential research and educational tool that can be used by students and researchers from diverse disciplines. Key Points We introduce BioRT‐HBV, a watershed scale reactive transport model that is parsimonious, flexible with reaction network, easy to use and requires minimal data BioRT‐HBV can simulate a variety of user‐defined biogeochemical processes, including carbon and nitrogen processes BioRT‐HBV is open source for any researchers interested in ecohydrological and biogeochemical reactive transport processes
Publisher
John Wiley & Sons, Inc,American Geophysical Union (AGU),John Wiley and Sons Inc
Subject
/ Atmospheric Composition and Structure
/ Biogeochemical Cycles, Processes, and Modeling
/ Biogeochemical Kinetics and Reaction Modeling
/ Carbon
/ Climate and Interannual Variability
/ Climate Change and Variability
/ Disaster Risk Analysis and Assessment
/ Earthquake Ground Motions and Engineering Seismology
/ Hydrological Cycles and Budgets
/ Kinetics
/ Land/Atmosphere Interactions
/ Marine Geology and Geophysics
/ Modeling
/ Nitrogen
/ Ocean influence of Earth rotation
/ Ocean Monitoring with Geodetic Techniques
/ Ocean/Atmosphere Interactions
/ Ocean/Earth/atmosphere/hydrosphere/cryosphere interactions
/ Oceanic
/ Oceanography: Biological and Chemical
/ Oceans
/ Potential evapotranspiration
/ Risk
/ Rivers
/ Sea Level: Variations and Mean
/ Solutes
