PMID- 25607668
OWN - NLM
STAT- MEDLINE
DCOM- 20151013
LR  - 20181202
IS  - 0273-1223 (Print)
IS  - 0273-1223 (Linking)
VI  - 71
IP  - 1
DP  - 2015
TI  - Influence of local calibration on the quality of online wet weather discharge 
      monitoring: feedback from five international case studies.
PG  - 45-51
LID - 10.2166/wst.2014.465 [doi]
AB  - This paper reports about experiences gathered from five online monitoring 
      campaigns in the sewer systems of Berlin (Germany), Graz (Austria), Lyon (France) 
      and Bogota (Colombia) using ultraviolet-visible (UV-VIS) spectrometers and 
      turbidimeters. Online probes are useful for the measurement of highly dynamic 
      processes, e.g. combined sewer overflows (CSO), storm events, and river impacts. 
      The influence of local calibration on the quality of online chemical oxygen 
      demand (COD) measurements of wet weather discharges has been assessed. Results 
      underline the need to establish local calibration functions for both UV-VIS 
      spectrometers and turbidimeters. It is suggested that practitioners calibrate 
      locally their probes using at least 15-20 samples. However, these samples should 
      be collected over several events and cover most of the natural variability of the 
      measured concentration. For this reason, the use of automatic peristaltic 
      samplers in parallel to online monitoring is recommended with short 
      representative sampling campaigns during wet weather discharges. Using reliable 
      calibration functions, COD loads of CSO and storm events can be estimated with a 
      relative uncertainty of approximately 20%. If no local calibration is 
      established, concentrations and loads are estimated with a high error rate, 
      questioning the reliability and meaning of the online measurement. Similar 
      results have been obtained for total suspended solids measurements.
FAU - Caradot, Nicolas
AU  - Caradot N
AD  - Kompetenzzentrum Wasser Berlin gGmbH, Cicerostrasse 24, Berlin D-10709, Germany 
      E-mail: nicolas.caradot@kompetenz-wasser.de.
FAU - Sonnenberg, Hauke
AU  - Sonnenberg H
AD  - Kompetenzzentrum Wasser Berlin gGmbH, Cicerostrasse 24, Berlin D-10709, Germany 
      E-mail: nicolas.caradot@kompetenz-wasser.de.
FAU - Rouault, Pascale
AU  - Rouault P
AD  - Kompetenzzentrum Wasser Berlin gGmbH, Cicerostrasse 24, Berlin D-10709, Germany 
      E-mail: nicolas.caradot@kompetenz-wasser.de.
FAU - Gruber, Gunter
AU  - Gruber G
AD  - Institute of Urban Water Management and Landscape Water Engineering, Graz 
      University of Technology, Stremayrgasse 10/I, Graz A-8010, Austria.
FAU - Hofer, Thomas
AU  - Hofer T
AD  - Institute of Urban Water Management and Landscape Water Engineering, Graz 
      University of Technology, Stremayrgasse 10/I, Graz A-8010, Austria.
FAU - Torres, Andres
AU  - Torres A
AD  - Department of Civil Engineering, Research Group Ciencia e Ingenieria del Agua y 
      el Ambiente, Pontificia Universidad Javeriana, Edificio J.G. Maldonado, S.J., 
      Carrera 7 No. 40-62, Bogota, D.C., Colombia.
FAU - Pesci, Maria
AU  - Pesci M
AD  - Universite de Lyon, INSA Lyon, LGCIE, 34 avenue des Arts, Villeurbanne F-69621, 
      France.
FAU - Bertrand-Krajewski, Jean-Luc
AU  - Bertrand-Krajewski JL
AD  - Universite de Lyon, INSA Lyon, LGCIE, 34 avenue des Arts, Villeurbanne F-69621, 
      France.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - England
TA  - Water Sci Technol
JT  - Water science and technology : a journal of the International Association on 
      Water Pollution Research
JID - 9879497
SB  - IM
MH  - Biological Oxygen Demand Analysis
MH  - Calibration
MH  - Colombia
MH  - Environmental Monitoring/*methods
MH  - Europe
MH  - Meteorology/methods
MH  - Nephelometry and Turbidimetry/*methods
MH  - *Rain
MH  - Reproducibility of Results
MH  - Spectrophotometry, Ultraviolet/*methods
EDAT- 2015/01/22 06:00
MHDA- 2015/10/16 06:00
CRDT- 2015/01/22 06:00
PHST- 2015/01/22 06:00 [entrez]
PHST- 2015/01/22 06:00 [pubmed]
PHST- 2015/10/16 06:00 [medline]
AID - 10.2166/wst.2014.465 [doi]
PST - ppublish
SO  - Water Sci Technol. 2015;71(1):45-51. doi: 10.2166/wst.2014.465.