Abstract

When designing and rehabilitating sanitary sewers, there are various methods available for estimating and predicting the impacts of inflow and infiltration on sanitary sewer systems. Each method presents challenges that need to be addressed so that rehabilitation options and designs can accommodate the conditions that the best available data suggest. This chapter provides an introduction to rainfall derived inflow and infiltration (RDII), an overview of the methods available for estimating RDII, a discussion of the challenges posed by the three most commonly used methods, and potential responses to these challenges.

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