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Installation of the continuous monitoring of 9 Vichy-Val d'Allier's sewers overflows (Vichy Val d'Allier, 2015)

publié le 14 août 2015, 00:09 par 3D EAU Ingénieur   [ mis à jour : 11 sept. 2015, 09:32 ]

Superposition des surfaces libres générées par plusieurs débits au sein du déversoirs
The Conurbation Community of Vichy Val d’Allier committed to the instrumentation of 9 combined sewer overflows.

This project was undertaken in partnership with Larbre Ingénierie. Each sewer overflow was modelled in order to determine the most appropriate and adapted sensor for each, so as to guarantee:

- a precise measurment : meteorology: calibration law water level/flow rate, associated to a value of uncertainty, easy to implement inautomated monitoring program.

- a low investment cost linked to the limited works required to install the automated

                                                                                        - a reduced operating operating cost thanks to non-intrusive

Reference page of the installation of the continuous monitoring of 9 Vichy-Val d'Allier's sewers overflows

Video : example of the 3D modeling of one of the Vichy's sewer overflows

Expertise of the Venturi flume of the watewater treatment plant of the town of Chablis (2014)

publié le 13 avr. 2015, 06:13 par 3D EAU Ingénieur   [ mis à jour : 14 août 2015, 00:10 ]

Expertise of the Venturi flume of the watewater treatment plant of the town of Chablis (2014)

The Venturi flume measuring the flow rate being treated at the Chablis wastewater treatment plant was modeled in 3D. This allowed to understand the non compliance of the flume observed by the Agence de l’Eau (Water Agency), without modifying the Venturi flume or carrying out any works. The flume was recalibrated thanks to the model so as to correct the water level/flow rate law. The new calibrated law has an uncertainty error of < 5%.

Hydraulic diagnostic of the overflow chamber upstream of the La Chaînette depollution basin in Auxerre (SAFEGE, 2015)

publié le 12 avr. 2015, 14:32 par 3D EAU Ingénieur   [ mis à jour : 14 août 2015, 00:10 ]

Hydraulic diagnostic of the overflow chamber upstream of the La Chaînette depollution basin in Auxerre (SAFEGE, 2015)

Hydraulic diagnostic of a sewer overflow chamber connected to a depollution basin tested for various storm intensities.

Demonstration of the existence of a hydraulic jump and the recirculation of the fluid within the chamber.

Calculation of maximum levels reached within the chamber.


Elaboration of a method to measure the flow rate transiting through the junction gate of sewers VL9 and VL10 (SIAAP, 2014-2015)

publié le 12 avr. 2015, 07:05 par 3D EAU Ingénieur   [ mis à jour : 11 sept. 2015, 09:33 ]

Elaboration of a method to measure the flow rate transiting through the junction gate of sewers VL9 and VL10 (SIAAP, 2014-2015)

The SIAAP (Greater Paris Sanitation Authority) has undertaken the junction of two primary sewers, VL9 and VL10, which are both very deep and difficult to access. The objective of this study, assigned to SAFEGE and 3D Eau, was to develop a flow rate measuring device using the existing sensors in place and avoiding adding new sensors, by:
  • modeling the junction and the upstream shaft in 3D
  • developing a new flow rate law taking into account the fluid storage in the network.

Increasing the reliability of the flow rate measurements upstream of the Orge Station (DSEA 94, Conseil Général du Val de Marne, 2015)

publié le 7 avr. 2014, 02:45 par 3D EAU Ingénieur   [ mis à jour : 11 sept. 2015, 09:35 ]

Increasing the reliability of the flow rate measurements upstream of the Orge Station (DSEA 94, Conseil Général du Val de Marne, 2015)

The Sanitation Authority of the Conseil Général du Val de Marne wished to improve the reliability of the measurement method in place to measure the inflow into the Orge Station. A technical and economical comparative study was first carried out to help us choose solutions of optimal reliability, increasing the reliability of the measurements while at the same time reducing operational costs. The study covered a wide range of measuring devices (water level measurement only, water level and velocity measurements, ultrasonic transit time measurement methods), all located in complex hydraulic conditions. Among the measuring points that have had their reliability increased as a result of this study, we can mention:


  
  • increased reliability of the ultrasonic transit time sensors located upstream of a junction
  • flow rate measurement through a Venturi flume (custom designed using 3D modeling) with a circular bottom, subject to a strong downstream influence and a strong time variation.

Study of the Hauts de Montreuil water tank intakes (DEA 93, 2014)

publié le 23 mars 2014, 10:15 par 3D EAU Ingénieur   [ mis à jour : 14 août 2015, 00:12 ]

Study of the Hauts de Montreuil water tank intakes (DEA 93, 2014)

The Sanitation Authority of the Conseil Général de la Seine-Saint-Denis wished to complete the design of the 3 water intakes of a 21 500 m3 water tank, so as to:

Puits de chute hélicoïdal - surface libre phase eau

  • Check the maximum inflow capacity
  • Study the impact of the water tank on the upstream network water profile, particularly with regards to flooding risks
  • Confirm the distribution between volumes conserved and discharged
  • Develop a calibration law (water level / flow rate) for self-monitoring of the water tank
    In order to do this, 4 models were elaborated:
  • one for each of the three water intakes
  • one for the deep shaft supplying the water tank 

Diagnosis of the Briche sewer overflow (SIAAP, 2014)

publié le 14 oct. 2009, 23:51 par 3D EAU Ingénieur   [ mis à jour : 3 févr. 2016, 05:51 ]

Diagnosis of the Briche sewer overflow  (SIAAP, 2014)

Simulation DO Labriche ‎(SIAAP)‎


The SIAAP (Greater Paris Sanitation Authority) wished to validate and improve the existing self-monitoring device located on this 26 meter long sewer overflow using 3D modeling. The study assigned to SAFEGE and 3D Eau had the following objectives:
  • compare the discharge laws used with the ones resulting from modeling the overflow in 3D
  • optimise the measure by developing a new law, more adapted and precise.

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