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bj_code |
Birge and Juday code number |
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lakename |
current lake name |
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year4 |
year |
nominalYear |
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sampledate |
sample date |
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obs |
chronological observation number for this lake |
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laketype |
lake type |
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z |
sampling depth - 0 indicate surface |
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tc |
water temperature |
celsius |
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sd |
secchi disk reading |
meter |
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col |
apparent color (mg Pt/L) [mg PT relative to color scale] |
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con |
conductance |
microSiemensPerCentimeter |
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ph |
pH |
pH |
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do |
dissolved oxygen [Winkler] |
milligramsPerLiter |
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alk |
alkalinity |
milligramsPerLiter |
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co2 |
acidity (free co2) |
milligramsPerLiter |
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nh3_n |
ammonia nitrogen |
milligramsPerLiter |
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org_n |
organic nitrogen |
milligramsPerLiter |
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no3_n |
nitrate nitrogen |
milligramsPerLiter |
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no2_n |
Nitrite nitrogen mg N/l as determined by the sulphanilic acid procedure. |
milligramsPerLiter |
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sol_p |
soluble phosphorus |
milligramsPerLiter |
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org_p |
organic phosphorus |
milligramsPerLiter |
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tp |
total phosphorus |
milligramsPerLiter |
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cl |
chloride concentration |
milligramsPerLiter |
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so4 |
sulfate concentration |
milligramsPerLiter |
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si |
dissolved silica |
milligramsPerLiter |
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ca |
calcium |
milligramsPerLiter |
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mg |
magnesium |
milligramsPerLiter |
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fe |
total iron |
milligramsPerLiter |
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plank |
plankton biomass (weight loss on ignition (600 degc) of dried (60 degc) residue centrifuged from 1 l samples. |
milligramsPerLiter |
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res |
residue (2-6 liters evaporated to 25 ml at 70-75 deg c then dried and weighed) |
milligramsPerLiter |
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mn |
manganese concentration |
milligramsPerLiter |
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fe3 |
The quantity of dissolved ferric ion (Fe 3+) in a given sample. |
milligramsPerLiter |
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fe2 |
Dissolved quantity of ferrous ion in a given sample. |
milligramsPerLiter |
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cu |
copper |
milligramPerKilogram |
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al |
dissolved quantity of total aluminum |
milligramsPerLiter |
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chla |
The total quantity of chlorophyll-a in a given sample as determined by photometric method |
milligramsPerLiter |
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h2s |
hydrogen sulfide concentration |
milligramsPerLiter |
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po4 |
The quantity of dissolved phosphate in a given sample mgPerLiter as phosphate. |
milligramsPerLiter |
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bor |
boron concentration |
milligramsPerLiter |
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air_temp |
air temperature |
celsius |
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sample_time |
time of day at which the sample was taken |
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eh |
Proxy for the tendency of a chemical species to accept electrons and become reduced |
Volts |
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notes |
notes |
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state |
state abbreviation |
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