Global-scale Pareto-optimal calibration of a hydrological model

Applicant Professor Dr. Andreas Güntner
Subject Area Hydrogeology, Hydrology, Limnology, Urban Water Management, Water Chemistry, Integrated Water Resources Management
Term from 2018 to 2023
Project identifier Deutsche Forschungsgemeinschaft (DFG) - Project number 324641997
 

Project Description

The goal of project P3 is to improve the simulation of continental water cycle dynamics with the global hydrological model WaterGAP after parameter calibration against a broad range of observational water storage and flux data sets. To this end, a multi-objective calibration framework based on the principle of Pareto optimality (POC: Pareto-optimal calibration approach) has been set up by P3 in the first phase of GlobalCDA. In the second phase, POC will be expanded to a seamless global-scale calibration scheme. More complex hydrological signatures will be considered as calibration targets, in particular a novel approach for calibration against the dominant spatio-temporal patterns of water storage based on Empirical Orthogonal Function analysis. An optimal design of the calibration and data assimilation (C/DA) scheme including uncertainty assessment will be figured out in dedicated C/DA experiments together with the projects P1 to P4.
DFG Programme Research Units
Subproject of FOR 2630:  Understanding the global freshwater system by combining geodetic and remote sensing information with modelling using a calibration/data assimilation approach (GlobalCDA)