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Report Year: 2016
Lake Cornelia, Wright County
Summary Data Table
Parameter6/8/20167/27/20169/9/20162016201520142013201220112010200920072006200520042003200220012000
Lake Depth (m)5.04.95.05.05.15.15.14.95.25.25.25.25.15.65.45.35.35.44.8
Thermocline Depth (m)4.23.2NilN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/A
Secchi Disk Depth (m)0.40.40.70.50.50.50.50.50.70.61.00.40.50.40.80.70.61.60.6
Temperature(oC)21.527.421.923.624.722.123.223.924.322.924.123.823.225.723.222.724.623.824.9
Dissolved Oxygen (mg/L)9.29.38.59.09.59.29.07.67.97.98.18.78.28.410.19.18.29.58.4
Dissolved Oxygen Saturation (%)10411897106.2114.5105.4103.790.493.191.996.1102.495.7103.0118.5105.4100.9112.0101.9
Specific Conductivity (μS/cm)340.0340.0320.0333.3333.3333.3356.7386.7356.7356.7410.0359.8379.2380.1381.8369.5525.3406.1419.6
Turbidity (NTU)15.412.29.212.313.217.915.312.119.613.513.025.426.917.223.322.726.313.119.0
Chlorophyll a (μg/L)30.731.919.127.325.834.219.923.430.219.113.324.626.253.932.128.026.827.314.4
Total Phosphorus as P (μg/L)64.561.147.157.6605552.260.456.174.063.274627161716386-
SRP as P (μg/L)<2.8<2.8<2.8<2.8<4.3<5.6<14<10<11<8<9<1<1<12.31.41.7--
TKN (mg/L)1.531.691.431.551.501.911.531.601.871.30---------
Total Dissolved Solids (g/L)0.20.20.20.20.20.20.20.30.2----------
Total Nitrogen as N (mg/L)----------1.61.401.751.631.531.581.271.501.54
(Phenate)Ammonia Nitrogen (NH3 + NH4+) as N (μg/L)5.85<0.6<0.6<0.641<2623<14<145<136<130--------
(Phenate)Ammonia Nitrogen (NH3) as N (un-ionized)(μg/L)1-5-1-270<PRL<PQL<PQL<PQL<130--------
Nitrate + Nitrite (NO3 + NO2) as N (mg/L)<0.07<0.07<0.07<0.070.120.120<0.06<0.4<0.5-0.260.120.170.380.270.250.300.18
TN:TP ratio----------2723282326232226-
pH8.58.58.68.58.68.58.48.38.28.28.18.58.48.58.68.58.58.27.6
Alkalinity as CaCO3 (mg/L)149156147151149148160176159156174158164155164114180173186
Silica as Si (mg/L)-------------10.507.399.3710.77--
Dissolved Organic Carbon (mg/L)33.3637.7737.8036.3117.3688.739<7.68910.5210.6311.489.3413.8613.85--
Inorganic Suspended Solids (mg/L)974667675<46161312513848
Volatile Suspended Solids (mg/L)20231218191514169<9<821202191611710
Total Suspended Solids (mg/L)28301625252220231410133833331429141118
Carlson Trophic State Index (Secchi)*74726670697069706468607471736466675367
Carlson Trophic State Index (Chl a)*64656063626560626460566263706563636357
Carlson Trophic State Index (TP)*646360636362616362666466646663666468-
*Index values generally range between 0 and 100, with increasing values indicating more eutrophic conditions.
       
 
 
 
Water Column Profiles
6/8/20167/27/20169/9/2016

Contact Limnology Laboratory, Iowa State University