Subject
pesticide
water pollution
4
water quality
3
groundwater pollution
2
agricultural use
1
aquatic ecosystem
1
aquatic organism
1
biphenyl
1
drinking water contamination
1
ecotoxicology
1
emission
1
environmental effect
1
environmental model
1
environmental pollution
1
fertilizer
1
herbicide
1
hydrocarbon
1
insecticide
1
lake
1
measurement
1
nitrate
1
nitrogen
1
organic pollutant
1
river sediment
1
sediment
1
soil pollution
1
surface water
1
water chemistry
1
water pollution control
1
water protection
1