At the second workshop (in 1999), participants once again explored a variety of aspects of the Cooum River problem. A significant amount of time at this workshop was spent on use of the GIS-based DSS to undertake scenario analysis of basic management interventions in the Cooum system. Participants constructed scenarios by using the custom DSS interface to change parameters in the system. For example, they could indicate that some or all slums in the city be cleared and relocated outside of the system, speculate on technology or capacity changes at the sewerage treatment plant, or forecast the effect of increased water supply