Earth & Environmental Sciences
fluvial deposit
76%
river water
72%
nutrient
52%
metal
47%
city
44%
river
39%
sediment
25%
water
24%
nitrogen
23%
zinc
21%
heavy metal
19%
pollutant
15%
aquatic plant
15%
flowing water
15%
industrial effluent
15%
drinking water supply
15%
industrialization
13%
environmental protection
12%
creek
11%
nickel
11%
urbanization
10%
human activity
10%
sulfur
10%
nitrate
9%
phosphorus
9%
surface water
9%
public
8%
contamination
8%
water quality
8%
degradation
8%
carbon
7%
effect
3%
Engineering & Materials Science
Nutrients
100%
Sediments
98%
Rivers
78%
Metals
51%
Nitrogen
36%
Heavy metals
34%
Zinc
28%
Surface waters
18%
Potable water
16%
Nitrates
16%
Water quality
16%
Phosphorus
16%
Water supply
15%
Environmental protection
15%
Effluents
15%
Contamination
12%
Sulfur
12%
Impurities
12%
Nickel
12%
Carbon
10%
Degradation
9%
Medicine & Life Sciences
Rivers
98%
Metals
69%
Nutrients
68%
China
64%
Water
53%
Nitrogen
29%
Bays
25%
Heavy Metals
23%
Hong Kong
22%
Zinc
19%
Water Quality
14%
Conservation of Natural Resources
13%
Industrial Development
13%
Water Supply
13%
Urbanization
12%
Nickel
11%
Sulfur
11%
Environmental Pollutants
11%
Nitrates
10%
Phosphorus
10%
Drinking Water
9%
Carbon
9%
Growth
5%
Chemical Compounds
Nutrient
85%
Heavy Metal
66%
Industrial Effluent
50%
Surface Water
42%
Drinking Water
41%
Metal
35%
Phosphorus(.)
33%
Environmental Pollutant
32%
Nitrogen
24%
Carbon Atom
18%
Social Sciences
river
76%
water
62%
China
48%
Hong Kong
16%
Surface waters
14%
Water quality
12%
pollutant
11%
water management
11%
environmental pollution
10%
industrialization
10%
environmental protection
9%
urbanization
9%