A georeferenced river quality model

Water quality models have reached a high degree of sophistication, but thei r weak side remains user interface and output georeferencing. The aim of th is paper is to propose an interfacing procedure between two widespread but specialised programming environments: ArcVIEW as a Geographical Information System (GIS) and Matlab as a scientific programming tool for numerical ana lysis. The proposed solution is based on a Dynamic Data Exchange (DDE) betw een the two programs in order to operate a Matlab-based water quality model from within the GIS environment. It is shown how special GIS objects must be created and how they operate to achieve the goal of having quality data created by the model placed on a geographical map, together with other site features.