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Report Year: 2016
Central Park Lake, Jones County
Summary Data Table
Parameter6/21/20168/9/20169/21/20162016201520142013201220112010200920072006200520042003200220012000
Lake Depth (m)4.54.94.34.64.54.54.94.54.65.14.75.04.74.74.94.94.74.94.5
Thermocline Depth (m)2.52.5NilN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/A
Secchi Disk Depth (m)2.30.40.41.01.62.20.60.60.30.60.80.60.50.81.82.30.82.70.6
Temperature(oC)28.926.722.225.923.020.922.724.122.124.025.125.424.627.924.426.026.525.324.8
Dissolved Oxygen (mg/L)9.79.27.08.69.96.29.112.06.98.412.410.38.710.68.56.811.712.58.4
Dissolved Oxygen Saturation (%)12611581107.1114.268.5108.2143.178.2100.7150.2125.8103.5137.6103.083.6146.5156.7101.3
Specific Conductivity (μS/cm)360.0330.0350.0346.7366.7306.7303.3370.0346.7386.7340.0309.8319.4324.6383.5339.7476.0383.6360.5
Turbidity (NTU)0.616.29.48.77.07.820.118.226.411.316.926.5532.419.312.510.721.96.735.8
Chlorophyll a (μg/L)6.460.2164.577.033.519.470.188.695.740.543.348.982.467.325.312.744.816.819.9
Total Phosphorus as P (μg/L)55.7140.9237.9144.884114128.8208.5161.9112.481.690101100807410148-
SRP as P (μg/L)<2.8<2.810.83.06.630.3<1426.9<11<8<9<1<12.92.66.1<1--
TKN (mg/L)0.681.982.471.711.321.762.062.592.840.79---------
Total Dissolved Solids (g/L)0.20.20.20.20.20.20.20.20.2----------
Total Nitrogen as N (mg/L)----------1.51.101.781.351.271.101.401.001.73
(Phenate)Ammonia Nitrogen (NH3 + NH4+) as N (μg/L)209.25292.8017.00173<26651141<14473<136<130--------
(Phenate)Ammonia Nitrogen (NH3) as N (un-ionized)(μg/L)6239435244<PRL<PQL<PQL<PQL<130--------
Nitrate + Nitrite (NO3 + NO2) as N (mg/L)<0.07<0.07<0.07<0.070.120.16<0.14<0.06<0.4<0.5-0.120.120.120.140.120.350.250.16
TN:TP ratio----------1913191315151422-
pH8.88.48.88.68.48.18.48.88.58.18.38.68.88.78.68.88.68.36.9
Alkalinity as CaCO3 (mg/L)154141145147164129131152135166145147141153164107142161155
Silica as Si (mg/L)-------------5.612.723.755.48--
Dissolved Organic Carbon (mg/L)27.3934.7737.5733.2428.95155.899<7.6<6.4<6.25.946.528.836.2510.2611.33--
Inorganic Suspended Solids (mg/L)223224<3.2<2<5<4536434843
Volatile Suspended Solids (mg/L)4816973121613<9111114846925
Total Suspended Solids (mg/L)610191197141816815132012791759
Carlson Trophic State Index (Secchi)*48737260534868687568636869635248644667
Carlson Trophic State Index (Chl a)*49718173656072757567686974726256685860
Carlson Trophic State Index (TP)*627583766873748178726869717167667160-
*Index values generally range between 0 and 100, with increasing values indicating more eutrophic conditions.
       
 
 
 
Water Column Profiles
6/21/20168/9/20169/21/2016

Contact Limnology Laboratory, Iowa State University