Agriculture & Biology
Columbia River
100%
pollution load
87%
estuaries
68%
oceans
42%
nutrients
39%
nitrites
26%
rivers
20%
silicic acid
18%
diammonium phosphate
17%
water
16%
tides
15%
turbidity
14%
ammonium
12%
organic matter
11%
bioactive properties
11%
nitrates
11%
phosphates
9%
salts
9%
summer
8%
environmental factors
8%
duration
8%
Earth & Environmental Sciences
estuary
51%
sensor
45%
nutrient
43%
in situ
40%
river
32%
nitrite
24%
ocean
22%
ammonium
22%
tidal water
18%
silicic acid
18%
remineralization
16%
orthophosphate
15%
tidal current
14%
biological activity
13%
observatory
12%
residence time
11%
turbidity
11%
water column
10%
environmental conditions
10%
phosphate
10%
nitrate
9%
salt
9%
productivity
9%
organic matter
8%
summer
7%
removal
6%
water
4%
analysis
3%