Measuring points triad quality assessment

Ecological assessment of the quality of the waterbed in Flanders according to triad consists of three different evaluations that are combined into one final assessment: a physical chemical, an ecotoxicological and a biological evaluation. The quality of a waterbed is compared to a reference soil that is close to its natural state (Deckere, De Cooman et al. 2000). The more hatches that show a deviation from the reference soil, the worse the waterbed quality. Since 2016, 300 monitoring sites have been sampled every 6 years within the waterbed monitoring network (VMM), previously 600 monitoring sites every 4 years. The TKB gives an existing risk of contamination.