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biological properties
50
biologische eigenschappen
50
nederland
50
netherlands
50
canals
40
kanalen
40
river water
40
rivers
40
rivieren
40
rivierwater
40
streams
40
water
40
waterlopen
40
aquatic ecosystems
30
aquatische ecosystemen
30
biocenose
30
biocoenosis
30
hydrobiologie
30
hydrobiology
30
binnenwateren
20
fresh water
20
hydrologie
20
hydrology
20
inland waters
20
lakes
20
meren
20
plassen
20
ponds
20
reservoirs
20
water quality
20
zoet water
20
absorptie
10
absorption
10
acid rain
10
acidity
10
algae
10
algen
10
aquatic organisms
10
bacillariophyta
10
biological techniques
10
biologische monitoring
10
biologische technieken
10
biomonitoring
10
chemical composition
10
chemical properties
10
chemische eigenschappen
10
chemische samenstelling
10
cyanobacteria
10
cyanobacteriën
10
droge depositie
10