3455 x 5197 px | 29,3 x 44 cm | 11,5 x 17,3 inches | 300dpi
Altre informazioni:
test water river creek flow pollutants pollution pipe science scientist analyze analysis sample river waterway irrigation equipment salt salinity clean cleanliness purity chemist man male person scientist quality poison toxic chemicals pollute man state industry reflective jacket safety hard hat protective clothing measure ecology eco environment hydrology fieldwork university study baseline turbidity healthy clean measurement flow trees outback quality research testing helmet orange reflection dirty water muddy turbid flow
