Sediment Transport in Urban Drainage Channels

Abstract

Climate change is one of the main reasons for the failing performance of the urban drainage channels. Difference between the dry and wet seasons causes sediment deposition in urban drainage systems due to climate change. Deposited sediments in drainage channels are the main source of pollution that can spread in urban areas during floods. To this end in order to design sustainable drainage systems adaptive climate change strategies must be considered. In order to minimize the failure performance of urban drainage systems they must be designed based on a sediment transport principle that is called self-cleaning. Two fundamental design criteria of bed sediment motion and non-deposition approaches can be considered to mitigate sedimentation problems in drainage systems. Incipient motion and scouring concepts are categorized as bed sediment motion criteria while non-deposition with clean bed non-deposition with deposited bed and incipient deposition concepts can be implemented as non-deposition self-cleansing criteria. This chapter provides the main design methods and relationships considering effective hydraulic parameters for the design of urban drainage channels that could be adopted as alternative options for drainage systems design under the climate change impacts. © 2024 Elsevier B.V. All rights reserved.