A new global model tracks how humans use and deplete Earth's water
In short: Researchers have introduced WaterGAP v2.2d, a global hydrological model designed to quantify how humans use groundwater and surface water. By simulating water flows and storage across all land areas, the model helps scientists assess water stress and the depletion of resources, particularly under the influence of climate change.
The model integrates water use components with a global hydrology model to compute net abstractions from various sources. While the researchers evaluated the model's outputs, such as streamflow and water storage anomalies, against observational data, the paper primarily focuses on describing the model's architecture and its capacity for future assessments.
The study's primary focus is on the technical description and evaluation of the model's capabilities rather than presenting new empirical observations of a specific geographic event.
Why it matters: This model is a vital tool for understanding how human activity and climate change impact global freshwater availability.
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