ABSTRACT
This chapter presents sample applications of numerical models for predicting the quantity and quality of wastewater (total suspended solids, nutrients, chemical oxygen demand, biological oxygen demand, and microorganisms (Escherichia coli) for catchments in Poland, Italy, Slovakia, and Croatia. This chapter includes a computational example of the GLUE+GSA methodology for sensitivity and uncertainty analysis for a catchment in Poland within the city of Kielce. This chapter, dedicated to the case study of the city of Vallescura (Italy) analyses the environmental impacts on water bodies caused by CSO loads, the load of users not connected to the sewer system, and by WWTP effluent. The proposed solution is presented in two alternatives, for which the study then analyses their impacts and the degree of reduction of the load on water bodies by the transported pollution. In the case studies of the Hron (Slovakia) and Drava (Croatia) rivers, the impact of combined sewer overflows (CSOs) on these rivers is analysed using different rainfall event scenarios (different rainfall intensities and durations), resulting in particular IDF (Intensity-Duration-Frequency) curves of pollutant loads to the watercourses.
