SCI, Research trend, Scientometrics, Web of Science, Estuary, Water Pollutants - analysis, Water Pollution - statistics & numerical data, Environmental Monitoring - methods, Polycyclic Aromatic Hydrocarbons - analysis, Geologic Sediments - chemistry, Fresh Water - chemistry, Seawater - chemistry, Water Pollution - analysis, Eutrophication, Estuaries, Polluti...