1) Indicators of streamflow drought hazard (SDHI) as computed by WaterGAP 2.2d (climate data WFDEI-GPCC) for the whole globe except Antarctica, spatial resolution: 0.5°, monthly data for the reference period 1986-2015: Indicators of drought magnitude: SPI12, SPEI12, SSI1, SSI12, EP1, RDQI1 Indicators of drought severity: CDQI1-Q50, CDQI1-Q80, CDQI1-Q80-HS, CDQI1-WUs, CDQI1-WUs-EFR, CDQI1-Q50_f, CDQI1-Q80_f, CDQI1-WUs_f, CDQI1-WUs-EFR_f, CEP1(20%)_f, CRDQI1(-50%)_f 2) WaterGAP grid cell IDs ("arcid") with longitude and latitude (WaterGAP_ArcID_lon_lat.txt) 3) Streamflow observations and SDHI (based on observations) for two GRDC gauging stations: Input_Figure_2_Little_Colorado_River.txt (station near Cameron) and Input_Figure_2_Danube_River.txt (station at Hofkirchen) 4) WaterGAP output: Mean monthly surface water abstractions in km3 per month: Mean_monthly_WUs_km3_per_month_WFDEI_GPCC_ant_22d_1986_2015.txt 5) Input data for computing Pearson correlation between SSI1 based on observations and each of the five indicators SSI1 (simulated), SPI3, SPI6, SPI9, and SPI12. Indicators computed for 218 out of 220 GRDC gauging stations with continuous streamflow observations between 1986 and 2015. The folder also contains a list of the 220 GRDC station numbers and the related WaterGAP grid cell ID ("arcid").