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            <gco:CharacterString>Réseau de mesure de la qualité des eaux au débouché en mer des pluviaux primaires du service de la Communauté d'Agglomération de La Rochelle.
En chaque point du réseau sont mesurés des paramètres de l'eau. Chaque point est un lieu dit précis avec des repères fixes.
Titre et contenu des champs de la table attributaire :
- ID_CDA_LR : numéro du point de mesure dans le catalogue du service de la CDA La Rochelle
- Commune : nom de la commune du point de prélèvement d'eau et de mesure in situ
- Localisati : localisation précise du point de mesure dans la commune
- Long_LIIet = longitude du point de mesure en Lambert II étendu
- Lat_LIIet = latitude idem
- Fréquence = fréquence ou périodicité des mesures
- Debut_données = date de la première donnée disponible
- Fin_données = date de la dernière donnée disponible en date
- MES = matière en suspension (mesurée par néphélométrie)
- DBO5 = demande biologique en oxygène (mg/L)
- DCO = demande chimique en oxygène  (mg/L)
- E_coli = nombre d'Escherichia coli dans 100mL
- Entérocoques = nombre de bactéries Entérococales dans 100mL
- Nitrates = concentrations en NO3/NO4  (mg/L)
- Ammonium = concentration en ion ammonium  (mg/L)
- Phosphate = concentration en PO4 (mg/L)
- COT = carbone organique total (mg/L)
Tous ces paramètres sont mesurés dans un laboratoire sous accréditation sur un échantillon d'eau prélevé par point. Les résultats des mesures sont analysées par un système d'évaluation de la qualité de l'eau par comparaison à la grille SEQ Eau du Ministère chargé de l'environnement.
Les valeurs rapportées dans la table attributaire sont des valeurs établies à partir des données disponibles conformément à cette grille.
En plus de ces paramètres sont mesurés in situ = température, pH, conductivité/salinité, oxygène dissous
Fréquence des mesures : 7-8/an 1998-2001, 4/an depuis 2001
Les mesure in situ sont faites à l'aide de sondes.</gco:CharacterString>
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