Fridman, D.

Kahil, T.

Wada, Y.

International Institute for Applied Systems Analysis (IIASA)

Evaluating the global wastewater’s untapped irrigation potentialEGU General Assembly 2023, Vienna, Austria27/4/2023Water Security Research Group (WAT), Biodiversity and Natural Resources Program (BNR), Interational Institute for Applied System Analysis (IIASA), Laxenburg AustriaDor Fridman, Yoshihide Wada, & Taher Kahil2Wastewater irrigation untapped potential  is theoretically highGlobal crops’ water footprint: 7,404 km3 year-1Global crop net irrigation demand (km3 year-1)888Generation360Treatment188Global wastewater(km3 year-1)Reused4140%21%5%Mekonnen and Hoekstra, 2011; Jones et al., 2021Four technological scenariosIn this research we have estimated the irrigation potential of reclaimed wastewater at a global, regional, and national scale, under four different technological scenarios.3 GATWIP: Global Assessment of the Treated Wastewater Irrigation PotentialData4 GATWIP: Global Assessment of the Treated Wastewater Irrigation PotentialAvailable treated wastewaterJones, et al. (2021)Crop production (irrigated, all crops)IFPRI (2019)Crop irrigation requirementBruckner, et al. (2019)Irrigation req. mapsGravitational flow maskMaximal conveyance distanceNational division to wastewater treatment categoriesMacedo, et al. (2021)Available treated wastewater by treatment levelIrrigation req. in service areasGravity model-based allocation procedureList of crops with irrigation restrictions (FAO)Discharge unallocated wastewaterWater scarcity mapsGassert, et al. (2013)Total available wastewater (m3)Irrigation demand (m3)Allocated wastewater by crop (m3)Total conveyance distance (km)Discharged wastewater (m3)Irrigation requirementsWastewater availabilityWater allocation5 GATWIP: Global Assessment of the Treated Wastewater Irrigation PotentialAvailable treated wastewaterJones, et al. (2021)Crop production (irrigated, all crops)IFPRI (2019)Crop irrigation requirementBruckner, et al. (2019)Irrigation req. mapsGravitational flow maskMaximal conveyance distanceNational division to wastewater treatment categoriesMacedo, et al. (2021)Available treated wastewater by treatment levelIrrigation req. in service areasGravity model-based allocation procedureList of crops with irrigation restrictions (FAO)Discharge unallocated wastewaterWater scarcity mapsGassert, et al. (2013)Total available wastewater (m3)Irrigation demand (m3)Allocated wastewater by crop (m3)Total conveyance distance (km)Discharged wastewater (m3)Irrigation service areas6 GATWIP: Global Assessment of the Treated Wastewater Irrigation PotentialAvailable treated wastewaterJones, et al. (2021)Crop production (irrigated, all crops)IFPRI (2019)Crop irrigation requirementBruckner, et al. (2019)Irrigation req. mapsGravitational flow maskMaximal conveyance distanceNational division to wastewater treatment categoriesMacedo, et al. (2021)Available treated wastewater by treatment levelIrrigation req. in service areasGravity model-based allocation procedureList of crops with irrigation restrictions (FAO)Discharge unallocated wastewaterWater scarcity mapsGassert, et al. (2013)Total available wastewater (m3)Irrigation demand (m3)Allocated wastewater by crop (m3)Total conveyance distance (km)Discharged wastewater (m3)Treated wastewater can reach substantial irrigation shares7 GATWIP: Global Assessment of the Treated Wastewater Irrigation PotentialOnly water scarcity2.7%4.2%5.4%6.2%12.9%8.1%4%3.5%Irrigation share in major irrigated regions8SRES Regional division: NAM: North America; WEU: Western Europe; EEU: Central and Eastern Europe; CPA: Centrally planned Asia and China; FSU: Newly independent states of the Former Soviet Union; MEA; Middle East and North Africa; LAM: Latin America and the Caribbean; AFR: Sub-Saharan Africa; SAS: South Asia; PAO: Pacific OECD; PAS: Other Pacific Asia Economic growth can increase wastewater irrigation potential9 GATWIP: Global Assessment of the Treated Wastewater Irrigation PotentialWastewater reclamation at baseline scenario10 GATWIP: Global Assessment of the Treated Wastewater Irrigation PotentialInvestments in wastewater treatment plants as an expansion strategy11 GATWIP: Global Assessment of the Treated Wastewater Irrigation PotentialWastewater conveyance as an intensification strategy12 GATWIP: Global Assessment of the Treated Wastewater Irrigation Potential13Bridging the gap between the ‘practical’ and ‘theoretical’Global crops’ water footprint: 7,404 km3 year-1Global crop net irrigation demand (km3 year-1)888Theoretical potential360Global wastewater(km3 year-1)71 -11540%8 -13%Mekonnen and Hoekstra, 2011; Jones et al., 2021Large distance conveyancePressurized systemsCrop selectionReused415%InvestmentPractical potentialThank you for listening.14fridman@iiasa.ac.atThe project was funded by the IIASA Innovation and Bridging Funds

Evaluating the global wastewater’s untapped irrigation potential

https://pure.iiasa.ac.at/18746/1/GATWIP_DF_EGU2023.pdf

Evaluating the global wastewater’s untapped irrigation potential

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