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Report Year: 2016
Lacey Keosauqua Park Lake, Van Buren County
Summary Data Table
Parameter5/25/20167/12/20168/23/20162016201520142013201220112010200920072006200520042003200220012000
Lake Depth (m)7.67.57.37.57.17.57.56.57.67.77.97.87.77.18.18.0-8.68.2
Thermocline Depth (m)2.02.23.9N/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/A
Secchi Disk Depth (m)3.02.41.62.31.32.41.61.21.10.51.31.63.22.72.81.1-1.22.6
Temperature(oC)22.227.226.225.222.923.326.126.225.926.624.126.125.028.324.227.1-22.126.5
Dissolved Oxygen (mg/L)8.99.110.39.48.77.78.88.17.77.88.18.57.89.57.98.4-8.57.4
Dissolved Oxygen Saturation (%)102114127114.2101.490.3109.299.694.296.996.2104.294.3121.694.7105.8-92.592.0
Specific Conductivity (μS/cm)340.0320.0270.0310.0263.3266.7236.7286.7263.3230.0256.7232.2315.2307.4357.3342.6-219.2317.2
Turbidity (NTU)1.53.4<0.31.617.84.35.37.315.012.78.210.23.085.53.28.7-25.48.1
Chlorophyll a (μg/L)1.94.712.66.47.15.82.64.56.510.49.710.339.014.67.422.6-4.0-
Total Phosphorus as P (μg/L)16.916.127.220.14018<28.425.436.245.328.13717242152-83-
SRP as P (μg/L)<2.8<2.8<2.8<2.8<4.3<5.6<14<10<11<8<9<1<1<1<1<1---
TKN (mg/L)0.51<0.5<0.5<0.50.66<0.50.540.700.58<0.26---------
Total Dissolved Solids (g/L)0.20.20.20.20.20.20.20.20.2----------
Total Nitrogen as N (mg/L)----------<0.750.630.610.601.341.00-0.860.77
(Phenate)Ammonia Nitrogen (NH3 + NH4+) as N (μg/L)47.60<0.6<0.66<26<263742<145<136<130--------
(Phenate)Ammonia Nitrogen (NH3) as N (un-ionized)(μg/L)2-1-2-101<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<0.5-0.120.120.130.120.12-0.260.12
TN:TP ratio----------202555276419-30-
pH7.98.38.38.28.08.28.18.07.87.87.98.38.38.28.38.0-7.57.8
Alkalinity as CaCO3 (mg/L)1121061021071019483949283969812311212776-90165
Silica as Si (mg/L)-------------2.623.175.76---
Dissolved Organic Carbon (mg/L)25.8425.4626.9526.0814.5876.778<7.6<6.488.527.808.207.0012.18---
Inorganic Suspended Solids (mg/L)11228<2.1<3.2559<412512-303
Volatile Suspended Solids (mg/L)22<113<2.1<2.4<3.2<8<9<831325-42
Total Suspended Solids (mg/L)333311347712553538-335
Carlson Trophic State Index (Secchi)*44485348564753575970575343464559-5746
Carlson Trophic State Index (Chl a)*37465549504840454954535367575061-44-
Carlson Trophic State Index (TP)*45445247574650515659525645504861-68-
*Index values generally range between 0 and 100, with increasing values indicating more eutrophic conditions.
       
 
 
 
Water Column Profiles
5/25/20167/12/20168/23/2016

Contact Limnology Laboratory, Iowa State University