Reduction of discharges: Exploiting the network's storage capacities

Issue

Limit CSO spills to the receiving environment and optimise implementation costs for the project owner.

3D EAU Animation : spill reduction (in French)

1 – Dry weather

2 – Storage (moderate rain)

3 – Storage limit

4 – Spill (heavy rain)

5 – Back to normal

1. Installation in CSO chambers - Deomatic gate

The 3D EAU solution

Exploit the storage capacities of existing networks with the help of tilting gates developed and implemented by HYDRASS-3D EAU.

The water level at which the Deomatic gate opens can be adjusted according to your needs. This allows to store water during low to moderate rainfalls and discharge during heavy rains.

Dry weather
Gate closed,
no impact on the network

Low or moderate rain
Gate closed,
network storage

Heavy rain
Gate open,
neglectable impact on the network

Example of a tilting gate positioned on the weir in a CSO chamber (in French):

2. Installation in a sewer - Stocko gate

In the absence of a CSO, the Stocko gate makes it possible to store low to moderate rainfalls in the upstream manifold without limiting its hydraulic capacity for heavy rainfalls.

Dry weather
Gate closed, no impact on the network

Low to moderate rain
Gate closed, network storage

Heavy rain
Gate open, neglectable impact on the network

Network managers can test the hydraulic impact of the Deomatic and Stocko gates in their network models (such as SWMM, Infoworks...) using the 3D EAU tool.

3D EAU GATE CALIBRATION APP (in French)

In-line storage is an option to be considered in order to decrease discharges in the natural environment.