Supplementary dataset for "Potential of Wastewater Reuse to Alleviate Water Scarcity under Future Warming Scenarios"

The folder contains water gap data relative to the paper:Kahn, M., Sangiorgio, M., and Rosa, L. (2025) Potential of wastewater reuse to alleviate water scarcity under future warming scenarios. Environmental Research Letters, 20, 034012https://doi.org/10.1088/1748-9326/adb31d

All water gaps data are in km3/yr.

Gridded data(NetCDF at 0.5°)

baseline (2001-2010)

Water_gap_baseline_no_wastewater_reuse: Water gap under baseline climate scenario with no wastewater reuse.

Water_gap_baseline_treated_wastewater_reuse: Water gap under baseline climate scenario with treated wastewater reuse.

Water_gap_baseline_full_wastewater_reuse: Water gap under baseline climate scenario with full wastewater reuse.

1.5°C warming

Water_gap_15_no_wastewater_reuse: Water gap under 1.5°C warming scenario with no wastewater reuse.

Water_gap_15_treated_wastewater_reuse: Water gap under 1.5°C warming scenario with treated wastewater reuse.

Water_gap_15_full_wastewater_reuse: Water gap under 1.5°C warming scenario with full wastewater reuse.

3°C warming (5 models + average)

Water_gap_3_no_wastewater_reuse: Water gap under 3°C warming scenario with no wastewater reuse.

Water_gap_3_treated_wastewater_reuse: Water gap under 3°C warming scenario with treated wastewater reuse.

Water_gap_3_full_wastewater_reuse: Water gap under 3°C warming scenario with full wastewater reuse.

Aggregated data (.xlsx)

country_level_water_gaps.xlsx: Water gap aggregated by country for all the considered scenarios.

city_water_gaps.xlsx: 0.5° pixels with populations greater than 5,000,000 and non-zero water gaps corresponding to urban center.

seasonal_variations.xlsx: Monthly water gaps of the 5 most water scarce countries.

Note: the global water gap obtained by summing all the countries is not completely equivalent to the sum of all the pixels because some pixels' center is outside the polygon of the corresponding country.