River water quality model no. 1 (RWQM1): III. Biochemical submodel selection

The new River Water Quality Model no. 1 introduced in the two accompanying papers by Shanahan et al. and Reichert er al. is comprehensive. Shanahan et al, introduced a six-step decision procedure to select the necessary model features for a certain application. This paper specifically addresses one of these steps, i.e. the selection of submodels of the comprehensive bioche mical conversion model introduced in Reichert et al. Specific conditions fo r inclusion of one or the other conversion process or model component are i ntroduced, as are some general rules that can support the selection. Exampl es of simplified models are presented.