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Report Year: 2016
Pierce Creek Lake, Page County
Summary Data Table
Parameter6/14/20168/2/20169/11/20162016201520142013201220112010200920072006200520042003200220012000
Lake Depth (m)2.82.72.52.72.72.72.72.72.82.82.8--3.13.43.13.43.83.6
Thermocline Depth (m)1.72.21.0N/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/A
Secchi Disk Depth (m)0.70.40.40.50.40.50.50.30.50.50.5--0.40.20.30.50.40.5
Temperature(oC)27.025.923.325.422.222.122.224.724.924.325.1--24.222.225.725.223.026.0
Dissolved Oxygen (mg/L)4.510.514.29.77.59.55.89.37.98.28.0--8.89.38.18.17.79.0
Dissolved Oxygen Saturation (%)57129167117.586.6111.367.0111.695.196.898.3--104.7107.596.497.791.7111.1
Specific Conductivity (μS/cm)380.0260.0300.0313.3300.0273.3340.0326.7280.0346.7296.7--335.5307.3333.6313.2320.4329.8
Turbidity (NTU)12.723.845.427.325.716.252.525.822.126.530.8--141.1265.548.838.659.931.7
Chlorophyll a (μg/L)25.1114.257.465.658.739.558.882.042.638.745.0--63.842.124.2127.242.215.6
Total Phosphorus as P (μg/L)122.6185.3227.9178.6196279380.8444.5229.5176.2153.4--150244135105161-
SRP as P (μg/L)5.9<2.817.07.331.6135.4190.5170.539.127.019.9--26.067.229.419.6--
TKN (mg/L)1.191.791.451.481.642.021.882.37<0.5<0.26---------
Total Dissolved Solids (g/L)0.20.20.20.20.20.20.20.20.2----------
Total Nitrogen as N (mg/L)----------1.2--1.703.371.601.192.861.55
(Phenate)Ammonia Nitrogen (NH3 + NH4+) as N (μg/L)464.7066.50<0.61748414712367<145<136187--------
(Phenate)Ammonia Nitrogen (NH3) as N (un-ionized)(μg/L)299-312412<PRL<PQL<PQL<PQL<130--------
Nitrate + Nitrite (NO3 + NO2) as N (mg/L)2.220.10<0.0711.430.151<0.06<0.41---0.832.090.460.372.240.13
TN:TP ratio----------8--1220141717-
pH8.08.48.98.58.28.17.98.48.28.18.1--8.38.38.38.27.97.6
Alkalinity as CaCO3 (mg/L)155118141138129128152153126157141--152134108141141148
Silica as Si (mg/L)-------------6.7319.204.403.26--
Dissolved Organic Carbon (mg/L)29.2628.6333.1530.3522.8265.568<7.6<6.4<6.2--2.604.848.348.04--
Inorganic Suspended Solids (mg/L)92315152383511101420--3310726203122
Volatile Suspended Solids (mg/L)818201588141910911--13248774
Total Suspended Solids (mg/L)1640353031165029202431--4613134263826
Carlson Trophic State Index (Secchi)*6672757173697276697271--728576707371
Carlson Trophic State Index (Chl a)*6277707271677174676668--716762786758
Carlson Trophic State Index (TP)*7379827980859092837977--7683757177-
*Index values generally range between 0 and 100, with increasing values indicating more eutrophic conditions.
       
 
 
 
Water Column Profiles
6/14/20168/2/20169/11/2016

Contact Limnology Laboratory, Iowa State University