WaterGAP2 is a global water availability and water use model. Some introducing information can be found here: https://en.wikipedia.org/wiki/WaterGAP and at www.watergap.de
For participating in ISIMIP FastTrack we have used WaterGAP 2.2 (described in 10.5194/hess-18-3511-2014).
WaterGAP22ISIMIP2a is a model version which is based on WaterGAP 2.2 (described in 10.5194/hess-18-3511-2014) but applied to the specifics of the simulation round ISIMIP2a.
WaterGAP22c is a model version (WaterGAP 2.2c, described in 10.5194/hess-20-2877-2016) used for phase ISIMIP2b. Currently, we are re-running ISIMIP2a with WaterGAP22c to allow consistent assesments.
For ISIMIP3, we will use WaterGAP22e (WaterGAP 2.2e) which is the successor of WaterGAP 2.2d (described in 10.5194/gmd-14-1037-2021).
Runoff Routing: Linear reservoir, variable flow velocity based on Manning-Strickler
Routing Data: DDM30
Land-Use Change Effects: Only static land use map is used (see "landuse" variant in http://dx.doi.org/10.5194/hess-20-2877-2016).
Dams & Reservoirs
Dam And Reservoir Implementation: see http://dx.doi.org/10.5194/hess-20-2877-2016
Was The Model Calibrated?: True
Which Years Were Used For Calibration?: variable, depending on data availability
Which Dataset Was Used For Calibration?: WFD
How Many Catchments Were Callibrated?: 1312
How Is Vegetation Represented?: A very simplified LAI development model for canopy evaporation is included (see appendix of Müller Schmied et al., 2014, HESS)
Potential Evapotranspiration: Priestley-Taylor with varying alpha factor depending on aridity
Snow Melt: degree day method
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