Agriculture & Biology
groundwater flow
100%
groundwater
56%
arid zones
53%
landfills
33%
evaporation
26%
soil
19%
metals
19%
aquifers
17%
groundwater contamination
17%
solid wastes
16%
deserts
12%
valleys
12%
cadmium
11%
heavy metals
11%
seasonal variation
11%
pollution
11%
Mexico
10%
concentrates
10%
copper
10%
irrigation
10%
air
8%
monitoring
8%
water
5%
Engineering & Materials Science
Arid regions
82%
Groundwater
61%
Impurities
50%
Groundwater flow
32%
Land fill
25%
Soils
24%
Evaporation
20%
Cadmium
14%
Aquifers
13%
Heavy metals
13%
Metals
13%
Solid wastes
12%
Irrigation
12%
Water
11%
Contamination
10%
Pollution
9%
Copper
8%
Monitoring
5%
Air
5%
Earth & Environmental Sciences
arid region
54%
groundwater
31%
pollutant
30%
groundwater flow
19%
landfill
18%
evaporation
16%
soil
13%
metal
12%
source of pollution
11%
solid waste
9%
cadmium
9%
desert
8%
seasonal variation
8%
irrigation
8%
aquifer
7%
heavy metal
7%
copper
7%
valley
7%
well
6%
contamination
6%
water
6%
world
5%
air
5%
program
5%
monitoring
5%
chemical
5%
evaluation
4%
Chemistry
Groundwater
56%
Soil
18%
Evaporation
13%
Irrigation
11%
Flow
9%
Solid Waste
9%
Metal
6%
Heavy Metal
6%
Toxic
5%