As part of the NZWaM-Hydro project, NIWA, GNS Science and Manaaki Whenua - Landcare Research are developing the HydroDesk NZ tool that will provide capabilities to end user to develop hydrological simulations across New Zealand. We are seeking your input regarding the design of the tool around the model inputs- model outputs and the model engine components. This is done to ensure that the modelling framework and associated tool is as relevant as possible to water managers across New Zealand. As part of the project, a first version of the HydroDesk NZ will be developed by June 2020 focussing on coupling of surface water and groundwater models, while a second version will be completed by June 2022 implementing a water age module to the modelling framework. Please note that this survey information will be used to support the design of the first version of HydroDesk NZ. It will not restrict the design of the final version.