Agriculture & Biology
aquifers
91%
swamps
77%
highlands
60%
climate change
55%
water
27%
groundwater
19%
bedrock
17%
sandstone
16%
peat
12%
groundwater extraction
11%
base flow
10%
rain
9%
oxygen isotopes
8%
radon
8%
peatlands
7%
terrestrial ecosystems
7%
urbanization
6%
surface water
6%
tracer techniques
5%
valleys
5%
hydrogen
5%
plateaus
5%
sampling
4%
winter
3%
summer
3%
Medicine & Life Sciences
Groundwater
97%
Wetlands
94%
Climate
76%
Water
44%
Soil
13%
Oxygen Isotopes
11%
Oxygen-18
11%
Radon
8%
Climate Change
8%
Urbanization
7%
Hydrogen
6%
Ecosystem
6%
Social Sciences
Water sources
100%
interference
63%
integrity
57%
water
51%
climate
51%
Surface waters
24%
urbanization
15%
climate change
14%
Groundwater samples
2%
Earth & Environmental Sciences
swamp
71%
aquifer
48%
climate
35%
water
20%
rainwater
12%
peat
11%
groundwater
10%
bedrock
10%
catchment
9%
sandstone
9%
upland region
8%
groundwater extraction
8%
baseflow
6%
peatland
6%
radon
6%
headwater
6%
terrestrial ecosystem
6%
oxygen isotope
5%
relief
5%
urbanization
4%
tracer
4%
hydrogen
4%
plateau
4%
valley
4%
surface water
4%
mountain
3%
winter
3%
climate change
3%
summer
3%
Chemistry
Groundwater
71%
Catchment
56%
Peat
43%
Ecosystem
19%
Mining
18%
Surface Water
17%
Isotope
14%
Blue
12%
Shape
10%
Flow
10%
Hydrogen
8%
Dioxygen
8%