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Report Year: 2016
Kent Park Lake, Johnson County
Summary Data Table
Parameter6/21/20168/8/20169/18/20162016201520142013201220112010200920072006200520042003200220012000
Lake Depth (m)3.83.74.54.04.64.34.24.64.04.64.45.05.04.75.15.25.15.35.7
Thermocline Depth (m)1.72.53.7N/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/A
Secchi Disk Depth (m)0.80.70.30.60.50.60.80.50.60.60.51.00.80.80.81.21.21.50.9
Temperature(oC)28.327.022.525.923.623.523.523.424.424.625.226.426.127.124.725.526.527.125.4
Dissolved Oxygen (mg/L)7.712.14.68.110.311.810.210.29.87.710.58.911.010.38.97.87.213.32.7
Dissolved Oxygen Saturation (%)9915252101.0120.8138.7123.0119.8118.293.0127.3110.0134.9129.6107.994.189.5165.633.0
Specific Conductivity (μS/cm)330.0270.0270.0290.0276.7233.3240.0333.3303.3316.7300.0293.9304.6323.4306.7331.0504.2327.6330.1
Turbidity (NTU)8.58.920.512.615.317.221.122.921.610.619.412.57.1172.521.115.29.09.99.3
Chlorophyll a (μg/L)28.150.794.757.863.048.043.737.742.327.236.722.136.595.539.523.914.712.43.0
Total Phosphorus as P (μg/L)70.199.0175.1114.7112126169.996.574.460.686.659608499645740-
SRP as P (μg/L)<2.8<2.8<2.8<2.85.7<5.627.3<10<11<8<9<11.6<17.92.02.4--
TKN (mg/L)1.141.172.301.541.901.821.731.621.401.37---------
Total Dissolved Solids (g/L)0.20.20.20.20.20.20.20.20.2----------
Total Nitrogen as N (mg/L)----------1.20.801.101.131.570.950.771.081.08
(Phenate)Ammonia Nitrogen (NH3 + NH4+) as N (μg/L)20.30<0.6283.2010043<2643522<145<136<130--------
(Phenate)Ammonia Nitrogen (NH3) as N (un-ionized)(μg/L)3-12493388<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<0.5-0.120.120.120.150.120.140.220.14
TN:TP ratio----------1414181518161327-
pH8.58.88.38.58.48.98.78.48.58.07.98.48.78.77.68.58.48.57.2
Alkalinity as CaCO3 (mg/L)14412312012912611410714213414413715114615399109152146152
Silica as Si (mg/L)-------------4.954.083.102.91--
Dissolved Organic Carbon (mg/L)27.2630.5231.3229.7025.4276.526<7.6<6.4<6.25.075.636.025.637.888.22--
Inorganic Suspended Solids (mg/L)32332<2.154<54<415463425
Volatile Suspended Solids (mg/L)610201291114109<912681087433
Total Suspended Solids (mg/L)9122315111219141213161213151410858
Carlson Trophic State Index (Secchi)*63657667706863716866696063646357585462
Carlson Trophic State Index (Chl a)*63697570716968666763666166756762575541
Carlson Trophic State Index (TP)*657079737274787066636863636870646357-
*Index values generally range between 0 and 100, with increasing values indicating more eutrophic conditions.
       
 
 
 
Water Column Profiles
6/21/20168/8/20169/18/2016

Contact Limnology Laboratory, Iowa State University