Fig. 8: Spatial distribution of drought duration and severity in the West River Basin during the different periods.

a–d The drought duration and severity at the subbasin and hydrological response unit (HRU) levels during the whole period (1965–2018). e–h The drought duration and severity at the subbasin and HRU levels during the first half (1965–1991). i–l The drought duration and severity at the subbasin and HRU levels during the second half (1992–2018). Source data are provided as a Source Data file.