[The information system of the National Groundwater Monitoring Network.]

Abstract niet beschikbaarThe National Groundwater Monitoring Network has been operational since the early eighties. Thousands of pieces of data on groundwater quality have been collected. The need for a uniform storage of monitoring data at the National Institute of Public Health and Environmental Protection led to the choice of the database manager INGRES (Relational Database Management System). This report presents an inventory of the network's attributes with the aim of discovering shortcomings in the knowledge of the attributes and preparing the implementation of a monitoring information system developed with the INGRES system. The attributes incorporated into the database are classified as time dependent and time independent items. The time independent items are related to the monitoring points (boreholes with screens). The time dependent items are supplemented each year with results of laboratory analysis and field measurements.DGM/B