engleski

Numerical Modeling of Combined Sewer Systems

This paper analysis the main aspects related to numerical modeling of combined sewer systems. The main point is focused on definition of basic parameters used to describe rainfall runoff. Definition of subcatchment area is described with special concern, including all relevant parameters that define each particular subcatchment area. In combined sewer design practice, many different nearby subcatchment areas are often described as one with average values of certain parameters (runoff coefficients, infil-tration rates, etc.). The reason for such practice is to simplify the overall calculation procedure. Within this paper, the methodology of taking into consideration one bigger subcatchment area instead of few smaller ones will be analyzed. The justifiability and reliability of such practice is investigated regards to the quality of output values of certain hydraulics parameters inside the sewer network. The main issues of given analysis will be explained by using EPASWMM (version 5.0.021) numerical model. Specific example that describes the real conditions is created, with calibration proce-dure included based on available measurements data.

sewer, combined system, numerical modeling, catchment area, SWMM

nije evidentirano