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Report Year: 2016
Center Lake, Dickinson County
Summary Data Table
Parameter6/1/20167/18/20168/28/20162016201520142013201220112010200920072006200520042003200220012000
Lake Depth (m)4.74.84.44.64.54.54.64.64.64.64.74.84.95.14.64.84.54.84.7
Thermocline Depth (m)3.81.2NilN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/A
Secchi Disk Depth (m)2.00.60.61.11.30.81.70.71.31.21.51.01.01.91.62.30.82.30.9
Temperature(oC)21.026.722.323.321.422.922.523.724.123.822.423.023.922.521.621.623.022.424.3
Dissolved Oxygen (mg/L)8.814.08.710.511.19.49.28.111.85.59.68.711.19.410.910.99.310.29.2
Dissolved Oxygen Saturation (%)98175101124.5123.6108.7105.595.3141.263.8111.3100.9130.7107.1126.1124.6107.6120.2108.9
Specific Conductivity (μS/cm)640.0580.0580.0600.0646.7590.0606.7596.7530.0590.0626.7598.1585.5595.6605.4552.0644.7562.2505.3
Turbidity (NTU)3.421.810.611.910.27.913.716.311.712.37.09.026.7158.1157.212.59.323.213.9
Chlorophyll a (μg/L)8.181.348.145.830.258.534.949.236.214.66.761.366.374.821.212.529.050.048.6
Total Phosphorus as P (μg/L)34.187.370.864.1648298.2107.8104.4123.560.9901051391077091118-
SRP as P (μg/L)<2.8<2.8<2.8<2.8<4.3<5.6<1443.824.457.616.46.5<145.724.111.812.4--
TKN (mg/L)1.312.171.921.801.721.831.951.900.741.45---------
Total Dissolved Solids (g/L)0.40.40.40.40.40.40.40.40.3----------
Total Nitrogen as N (mg/L)----------1.72.152.271.791.861.972.031.982.18
(Phenate)Ammonia Nitrogen (NH3 + NH4+) as N (μg/L)30.00<0.6120.6547297960171<145441393--------
(Phenate)Ammonia Nitrogen (NH3) as N (un-ionized)(μg/L)2-513337<PRL<PQL<PQL<PQL<130--------
Nitrate + Nitrite (NO3 + NO2) as N (mg/L)<0.07<0.07<0.07<0.070.120.12<0.14<0.06<0.4<0.5-0.240.120.310.320.320.370.260.30
TN:TP ratio----------3025221520292317-
pH8.29.18.48.68.58.68.68.48.98.48.38.68.88.68.88.68.48.08.6
Alkalinity as CaCO3 (mg/L)151137127138144138148164144145172163169184180133166127204
Silica as Si (mg/L)-------------9.7210.736.206.83--
Dissolved Organic Carbon (mg/L)33.6734.2134.2434.0419.12109.88118101125.2812.5414.7513.8916.3817.70--
Inorganic Suspended Solids (mg/L)3<0.8323437<5<4<435625337
Volatile Suspended Solids (mg/L)31710108787<8<9<8712666837
Total Suspended Solids (mg/L)51713121110121496810161171212714
Carlson Trophic State Index (Secchi)*50686759566352655758546060515348634862
Carlson Trophic State Index (Chl a)*51746968647165696657497172736155646969
Carlson Trophic State Index (TP)*556966646468707271746369717572656973-
*Index values generally range between 0 and 100, with increasing values indicating more eutrophic conditions.
       
 
 
 
Water Column Profiles
6/1/20167/18/20168/28/2016

Contact Limnology Laboratory, Iowa State University