Reversing Procedure

Procedure for reversing, if applicable.

Revetment

A wall or a facing of wood, willow mattresses, steel units, stone or concrete placed on stream banks to prevent erosion.

Reynolds Number

A dimensionless quantity named after Osbourne Reynolds who first made know the difference between laminar and turbulent flow. The practical value of the Reynolds NumberA dimensionless quantity named after Osbourne Reynolds who first made know the difference between laminar and turbulent flow. The practical value of the Reynolds Number is that it indicated the degree of turbulence in a flowing liquid. It depends on the hydraulic radius of the conduit, the viscosity of the water and the velocity of flow. For a conduit of... is that it indicated the degree of turbulence in a flowing liquid. It depends on the hydraulic radius of the conduit, the viscosity of the water and the velocity of flow. For a conduit of a given size, the velocity is generally the major variable and the Reynolds Number will increase as the velocity of flow increases.

Rider

A shallow collection line that runs along the microtunneled trunk sewer to a drop manhole.

RII

RainfallPrecipitation in the form of water (usage includes snow). Induced Infiltration(1) Penetration of freshwater or groundwater into the sewer system through cracks, defective joints in the pipeline, and holes, or through lateral connections, manholes or inspection chambers. (2) All extraneous waters (storm water and ground water) which enter the wastewater collection system through various sources including, among others, pipe defects, defective service connections, manhole covers, roof leaders, and foundation drains.; is a particular form of infiltration which is similar to stormwater inflow. RIIRainfall Induced Infiltration; is a particular form of infiltration which is similar to stormwater inflow. RII generally occurs during and immediately after rainfall events. generally occurs during and immediately after rainfall events.