Impact model: HBV-IWW

HBV-IWW is one of the 15 regional hydrology models following the ISIMIP2a protocol which form the base of simulations for the ISIMIP2a regional water sector outputs; for a full technical description of the ISIMIP2a Simulation Data from Water (regional) Sector, see this DOI link:

Water (regional)
Contact Person
  • Stefan Plötner (, Institut für Wasserwirtschaft, Hydrologie und landwirtschaftlichen Wasserbau (Leibniz Universität Hannover) (Germany)

Information for the model HBV-IWW is provided for the simulation rounds shown in the tabs below. Click on the appropriate tab to get the information for the simulation round you are interested in.

Basic information
Model Version: HBV-IWW
Person Responsible For Model Simulations In This Simulation Round: Stefan Ploetner
Output Data
Experiments: historical
Climate Drivers: GSWP3, Historical observed climate data, PGMFD v.2 (Princeton), WATCH (WFD), WATCH+WFDEI
Date: 2018-12-17
Temporal Resolution Of Input Data: Climate Variables: daily
Temporal Resolution Of Input Data: Co2: -
Temporal Resolution Of Input Data: Land Use/Land Cover: -
Temporal Resolution Of Input Data: Soil: -
Input data sets used
Observed Atmospheric Climate Data Sets Used: Historical observed climate data
Climate Variables: tas, rlds, rsds, pr
Was A Spin-Up Performed?: Yes
Water Use
Water-Use Types: none
Runoff Routing: Muskingum method
Land Use
Land-Use Change Effects: none
Dams & Reservoirs
Dam And Reservoir Implementation: No specific implementation of reservoirs. As travel time within one river reach is accounted for in muskingum parameter k, retention could be introduced be this.
Was The Model Calibrated?: True
Which Years Were Used For Calibration?: 01/10/1978 - 28/02/1981 and 01/10/1987 - 30/09/1990
Which Dataset Was Used For Calibration?: WFD
How Many Catchments Were Callibrated?: 1 catchment (Tagus basin, Almourol station) containing 14 subbasins
How Is Vegetation Represented?: ETP (land use) = ET0 * crop coefficient (land use)
Potential Evapotranspiration: Turc-Wendling
Snow Melt: Degree-day-method
Modelled catchments
Modelled catchments: Tagus