https://doi.org/10.5194/hess-26-4251-2022-supplement

Observational monthly water inputs series Spanish Hydrological Repository (Centro de Experimentación de Obras Públicas, CEDEX) https://ceh.cedex.es/anuarioaforos/demarcaciones.asp

Precipitation/Temperature high-resolution gridded dataset Spanish Agency of Meteorology (Agencia Española de Meteorología, AEMET) http://www.aemet.es/es/serviciosclimaticos/cambio_climat/datos_diarios?w=2

The North Atlantic Oscillation Index National Oceanic and Atmospheric Administration (NOAA) https://www.cpc.ncep.noaa.gov/products/precip/CWlink/pna/nao.shtml

NCEP/NCAR Reanalysis 1 climate data Physical Sciences Laboratory (PSL), NOAA https://psl.noaa.gov/data/gridded/data.ncep.reanalysis.html

Mid-resolution permeability of soils dataset Spanish Geological Survey (Instituto Geológico y Minero Español, IGME) http://mapas.igme.es/Servicios/default.aspx#IGME_Permeabilidad_1M

HILDA: HIstoric Land Dynamics Assessment dataset Wageningen University and Research (WUR) https://www.wur.nl/en/Research-Results/Chair-groups/Environmental-Sciences/Laboratory-of-Geo-information-Science-and-Remote-Sensing/Models/Hilda/HILDA-data-downloads.htm

Spanish catchments boundaries dataset Spanish Ministry of Environment (Ministerio para la Transición Ecológica y el Reto Demográfico, MITECO) https://www.miteco.gob.es/es/cartografia-y-sig/ide/descargas/agua/cuencas-y-subcuencas.aspx