Context Problem Statement Stormwater Combined Sewer Overflows - - PowerPoint PPT Presentation

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Sep 26, 2023 544 likes •731 views

Context Problem Statement Stormwater Combined Sewer Overflows Limitations of actual measurement systems System Requirements Hardware Algorithms Water Level Surface Water Speed Partners Separated sewer system Stormwater discharges Combined

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Context

Problem Statement Stormwater Combined Sewer Overflows Limitations of actual measurement systems

System Requirements Hardware Algorithms

Water Level Surface Water Speed

Partners

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Separated sewer system Combined sewer system

CSOs Stormwater discharges

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Main source of pollution for heavy metals, PAHs, in urban areas…

Example: Field survey (US): leaks of oil by vehicles is equivalent to about 27 Exxon Valdez tanker spills every year…

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Important source of pollution: phosphorous, nitrogen,

rganic matter, pathogens and viruses, residues of

pharmaceuticals…

Video1 and Video 2

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1 km

> 480 [mg Cu/kg] 240 - 480 [mg Cu/kg] 120 - 240 [mg Cu/kg] 60 - 120 [mg Cu/kg] 30 - 60 [mg Cu/kg]

Flon River Vidy beach WWTP

0% 20% 40% 60% 80% 100% TSS Cu Zn Cr Pb Cd Ptot Parameter % of input to the Vidy Bay Stormwater CSOs WWTP

Chamberonne river

Probable effect concentration: 150 [mg/kg]

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SITE 505 AUTOROUTE 0,08 0,13 0,18 0,23 0,28 0,33 0,38 0,43 0,48 0,53 0,34 0,54 0,74 0,94 1,14 VITESSE [m/s] HAUTEUR [m] 5 fév 97 1992 16-19 janv 97

Hydraulic behaviour ?

Urgent need of a new measurement system ! Hydropix monitoring project

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Waterproof Resistance to corrosion Lighting Event‐based recording Intelligent filing Alarms Flow measurements

Water level Surface water speed

Remote viewing

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IP68 waterproof cameras Integrated IR illuminator Encoder

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Goals : use cameras for measurements Estimation of flow

Water level Surface water speed

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Results

Robust line detection Tested on real images Around 40 configurations

Examples of results…

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CTI/KTI Project : 2.5 years EtriNex

Videosurveillance Communications

EPFL/ECOL : hydrology EAWAG : hydrology EPFL/BIG : image processing City of Lausanne

Purchased a preliminary system

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Hardware : testing phase Image acquisition : OK Water level measurement

Done : robust line detection To do : spatial calibration, in situ testing

Surface water speed : to do Database management : to do Main program and GUI : to do

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