Summary
The ability to characterize hydrologically relevant differences between places is at the core of our science. A common way to quantitatively characterize hydrological catchments is through the use of descriptors that summarize relevant physical aspects of the system, typically by aggregating heterogeneous geospatial information into a single number. Such descriptors capture various facets of catchment functioning and structure, identify similarity or dissimilarity among catchments, and transfer hydrological information to unobserved locations. However, so far there is no agreement on how catchment descriptors should be selected, aggregated, and evaluated. Even worse, little is known about the existence of potential biases in the current practices to characterize catchments. In this systema
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