Earth & Environmental Sciences
anthropogenic effect
65%
groundwater flow
60%
isotope
47%
contamination
42%
groundwater
38%
city
36%
tunnel
14%
pumping
14%
human activity
12%
landfill waste
11%
pollutant
9%
industrial effluent
9%
mountainous area
8%
host rock
7%
river water
7%
fertilizer
6%
stable isotope
6%
household
6%
effluent
5%
water quality
5%
degradation
5%
indicator
4%
station
4%
mineral
4%
river
3%
rock
3%
distribution
2%
Engineering & Materials Science
Groundwater flow
100%
Isotopes
79%
Groundwater
76%
Contamination
62%
Subways
19%
Rivers
15%
Rocks
13%
Tunnels
13%
Fertilizers
10%
Water quality
9%
Land fill
9%
Effluents
9%
Minerals
8%
Impurities
7%
Degradation
5%
Water
4%
Chemical Compounds
Groundwater
69%
Isotope
55%
Flow
41%
Mineral Element
11%
Industrial Effluent
8%
Fertilizer
8%
Stable Isotope
7%
Indicator
6%
Environmental Pollutant
5%
Surface
2%