Earth & Environmental Sciences
fiber optics
80%
shore (nonmarine)
78%
groundwater
73%
sand
67%
shoreline
62%
accretion
61%
surface water
54%
erosion
49%
lake
45%
river
39%
groundwater-surface water interaction
39%
modeling
34%
glacial deposit
31%
temperature
31%
corridor
30%
frequency analysis
30%
moss
29%
uranium
29%
peatland
28%
sea level change
28%
lake level
25%
distribution
24%
tomography
23%
continental crust
22%
conductivity
22%
methane
20%
shoreline change
20%
littoral
20%
reflectivity
20%
wave action
18%
oxidation
17%
water table
16%
shrub
16%
porewater
15%
human activity
15%
sensor
15%
discriminant analysis
14%
Physics & Astronomy
ground water
100%
rivers
75%
surface water
41%
volcanology
39%
lessons learned
37%
sea level
36%
outcrops
30%
Columbia (Orbiter)
30%
margins
29%
crusts
28%
polarization
27%
corridors
27%
electrical resistivity
22%
aquifers
20%
reflectance
19%
characterization
18%
conductivity
18%
subsidence
15%
lava
14%
fiber optics
14%
tectonics
14%
cliffs
13%
porosity
13%
basalt
12%
spatial distribution
12%
dipping
11%
interactions
10%
clays
10%
oceans
9%
boreholes
9%
rigidity
9%
S waves
9%
division
8%
reflectors
8%
temperature
8%
dams
7%
water temperature
7%
degradation
6%
qualitative analysis
6%
water depth
6%
correlation coefficients
5%
products
5%
contaminants
5%
uranium
5%
sediments
5%
quantitative analysis
5%
estimates
5%
Agriculture & Biology
ground-penetrating radar
47%
Lake Michigan
39%
Carex aquatilis
36%
tomography
35%
shorelines
35%
peatlands
34%
electrical resistance
33%
methane production
29%
cassava
28%
methane
26%
sand
23%
spatial distribution
22%
monitoring
17%
Myrica gale
17%
graminoids
13%
mosses and liverworts
10%
methodology
9%
lakes
9%
civil engineering
8%
water table
8%
anthropogenic activities
8%
agriculture
8%
greenhouses
7%
geology
7%
oxidation
7%
peat
7%
root crops
7%
belowground biomass
6%
instrumentation
6%
shrubs
5%
crops
5%
aboveground biomass
5%
wind direction
5%
