Selective transferability mapping for cross-basin prediction of river electrical conductivity

2026-08-09

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Tom Lotz *

Wenjun Chen

Thomas Hennig

Shoubao Su

DOI：10.1016/j.jhydrol.2026.136207

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• Selective Transferability Mapping (STM) screens donors for cross-basin EC prediction. • Tests across 578 stations showed that cross-basin conductivity transfer is selective. • STM outperformed comparison approaches on supported basins without observed flow. • Donor support identified basins less prone to severe prediction failures. • Residual and stability analyses characterized prediction reliability.

Keywords:

Electrical conductivity

Ungauged basins

Catchment similarity

Data-driven water quality modeling

Random forest

Machine learning

Selective transferability mapping for cross-basin prediction of river electrical conductivity

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