Efficient on-line monitoring of water quality using automated measuring stations

Abstract

[ANGLÈS] Automated Measuring Stations for river quality monitoring have been used to generate on-line measurements of water quality variables. Even though a high degree of automation has been implemented at the levels of measurements, maintenance and control, data management and the resulting access to errors and uncertainties. Besides managing a monitoring program, there is the responsibility to ensure high quality data with data and methods that are broadly accessible, and as cost-e ective as possible. Moreover, higher assurance is needed to analyse, interpret, and apply data that are being collected so as to form monitoring networks that are designed to promote comparability of data across sites and across scales of space and time. monEAU (monitoring of water, "eau" in French) is the next generation of water quality monitoring networks. This project has as vision to provide some tools to get a exible and open modular system, a high quality/performance database, remote use, automatic data quality assessment, user-friendly and user-oriented software, and proactive and exible maintenance. In the context of the project, the objective of this thesis was to e ciently monitor, collect and manipulate water quality data such that unreliable data due to anomalies in sensors, insu cient maintenance tasks, severe environmental conditions and other external factors can be minimized. To achieve these goals it was required to maintain and keep the monitoring stations working, collect the data, analyse samples in the laboratory to verify sensor data, create an appropriate database, import all collected data to a database, and nally export the data to statistics software and data manipulation programs for posterior analysis.

[CATALÀ] Estacions de Mesura Automàtica pel monitoreig de la qualitat del riu s'han utilitzat per a l'obtencio de mesures en linia de paràmetres de la qualitat de l'aigua. Encara que un alt grau d'automatitzacio s'hagi implementat als nivells de mesura, manteniment i control, el tractament de dades i els resultats hereden errors i incerteses. D'altra banda, manejar un programa de monitoreig inclou la responsabilitat d'assegurar dades de qualitat, dades i mètodes ampliament accessibles, i un programa el mes rentable possible. A mes, un alt compromís es necessari per a analitzar, interpretar i aplicar les dades que han estat recol.lectades per xarxes de monitoreig dissenyades per promoure la comparació de dades de diversos llocs i de per odes diferents. monEAU (monitoreig de l'aigua, "eau"en franc es) forma part de la seguent generació de xarxes de monitoreig de la qualitat de l'aigua. Aquest projecte te la visio de desenvolupar diverses eines per tal d'aconseguir un sistema modulat i exible, una base de dades d'alta qualitat i d'alt funcionament, un us remot, una avaluacio de la qualitat de les dades automatica, un concepte de software facil d'usar i orientat a l'usuari, i un manteniment proactiu i exible. En el context d'aquest projecte, l'objectiu principal de la tesi ha estat monitorar, recol.lectar i manipular parametres de qualitat de l'aigua e cientment. Per tal d'aconseguir l'efectivitat es necessari reduir les dades poc ables causades per anomalies als sensors, insu cients manteniments, condicions ambientals adverses i altres factors externs. Per aconseguir aquestes tes s'ha mantingut en bones condicions i en funcionament les estacions de monitoreig, recol.lectat dades, analitzat mostres al laboratori per veri car les dades dels sensors, creat una base de dades apropiada, importat les dades recollides a la base de dades, i nalment exportat les dades a programes estadistics i de tractament de dades per a posteriors tractaments.