Emission predictions with a multi-linear reservoir model

For the assessment of combined sewer overflows detailed models are not nece ssary. Physically based conceptual models give an optimal balance between m odel uncertainty and uncertainty in the input data. Besides, it is importan t that continuous long term simulations are performed. To prove this, in th is paper the calibration of a reservoir model is discussed. The emission re sults of the reservoir model are compared with those of a hydrodynamic mode l. This research shows that a well-calibrated reservoir model can predict o verflow emissions as well as a detailed model, taking into account the unce rtainties in the input data. Moreover, when a reservoir model is used the c alculation times are 10(4) to 10(6) times smaller. Such simplified models a re an ideal tool to perform quickly various scenario analyses. (C) 1999 IAW Q Published by Elsevier Science Ltd. All rights reserved.