MODELING IN-STREAM WATER-QUALITY IN LOIS

The requirements of the Land-Ocean Interaction Study (LOIS) to model a large number of river systems are considered and an approach outlined that is compatible with data availability and LOIS objectives. The fu nctionality of software to assist data preparation and model applicati on is discussed and compared with the existing QUASAR model. The under lying rationale behind the development of a new software suite, QUESTO R, is described. As an example, the application of QUESTOR to the mode lling of the River Wharfe is presented. This includes the method used to define the extent of the network to be modelled and the ways in whi ch tributaries, industrial discharges and abstractions were to be repr esented. Model calibration procedures are discussed and model validati on results presented. (C) 1998 Elsevier Science B.V.