Date (Creation)

2016-11-10T08:00:00

Presentation form

Digital table

Purpose

Physico-chemical characterization of the water

Status

Ongoing

Maintenance and update frequency

Monthly

Theme

• Alkalinity
• Elements
• Temperature
• Isotopes
• pH
• Conductivity
• River
• Water
• Particle
• Suspension material

Place

• Reunion Island
• Watershed "Rivière des Pluies"

Access constraints

Restricted

Use constraints

Restricted

Spatial representation type

Vector

Denominator

1

Language

English

Character set

UTF8

Topic category

• Inland waters
• Environment

Begin date

2016

End date

en cours...

Reference system identifier

EPSG:4326

OnLine resource

PlPF1300 ( WWW:LINK-1.0-http--link )

OnLine resource

RvMCan ( null )

OnLine resource

RvPl100 ( null )

OnLine resource

RvPl435 ( null )

OnLine resource

RvQuina ( null )

OnLine resource

TuRPluie ( null )

Hierarchy level

Dataset

Statement

The variables concerned correspond to measurements made in the field (T°, Specific conductivity 25° and pH) during water sampling as well as alkalinity measurements made in the laboratory. The selected quality code is divided into 4 categories coded from 1 to 4: Code 1: correct Code 2: suspicious Code 3: bad Code 4: missing. Field measurements: They are carried out in 2016 and 2017 by a WTW conductivity and pH meter and from 2018 by an integrated "Smart-Troll" probe from the manufacturer INSITU). In both cases, the calibration and calibration protocols of the probes are carried out according to the manufacturer's instructions and at least once every 6 months for the conductivity probe and before each output for the pH probe. In this context, the data obtained with these two devices are considered reliable (code 1). Alkalinity measurements: They are performed in the laboratory by titrimetry within 1 to 2 months after sampling. The quality criterion was assessed as the average of two potential sources of error assessed as follows: - Uncertainty about the evolution of the mineralization of the sample evaluated by the variability of the conductivity measured in the field and that measured in the laboratory at the time of the ErCond= Abs(CondTerrain-CondLabo)/Cond terrain in %. - Uncertainty about the titration evaluated by the varibility of the results obtained by different interpretation methods with respect to the Gran method. ErTitr= EcType (HCO3)/Mean (HCO3 calculated by 4 graphical methods). The proposed qualification is based on the average of these two errors f (ErCond+ErTitr)/2<=5% : Code 1 If 5%<(ErCond+ErTitr)/2<=10% : Code 2 If (If (ErCond + ErTitr)not defined: Code 4

File identifier

dc0a5fa8-1d05-4656-969b-cb3f670023fe XML

Language

English

Character set

UTF8

Date stamp

2021-10-28T12:18:10

Metadata standard name

ISO 19115:2003/19139

Metadata standard version

1.0