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Wassereinzugsgebiet n
gen.	water catchment area; water gathering area; water intake area; catchment area; drainage area; drainage basin; catchment basin; hydrological basin
agric.	cachment basin; collecting area; river basin; drainage-basin
amer.	watershed
construct.	watershed basin; water collecting area
earth.sc.	hydrographical basin; hydrographic basin
earth.sc., environ., geogr.	drain district; drainage district; gathering area; gathering grounds
environ.	river catchment area
nat.res.	drainage river basin

Wassereinzugsgebiet: 5 phrases in 2 subjects

Environment	4
Natural resourses and wildlife conservation	1