ABSTRACT
Development of the groundwater quality at artificial groundwater recharge systems is important for reasons of clogging, etc. We present a general groundwater quality transport model that has an integrated, hierarchical set-up. Both the major groundwater composition and individual trace compounds can be modelled and the transport models are coupled with a data-information system. The approach aims at rninimizing the computation time and incorporating mechanistically oriented model parameters as much as possible. The major groundwater chemistry can be modelled with a multiple solute model, when one is solely interested in kinetically controlled biodegradation reactions, or with a multicomponent geochemical transport model, when the entire major composition has to be modelled. The process parameters for the microspecies are considered to be determined by the major chemistry. The actual values for sorption parameters are calculated from spatial data about the contents of reactive phases and typical mathematical functions that refer to the sorption affinity. Degradation constants for microorganics are obtained from literature for each specific redox environment.
