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Report Year: 2016
Little Spirit Lake, Dickinson County
Summary Data Table
Parameter6/1/20167/19/20168/28/20162016201520142013201220112010200920072006200520042003200220012000
Lake Depth (m)2.92.82.52.72.52.62.52.72.72.82.72.62.83.02.52.62.62.82.4
Thermocline Depth (m)Nil2.5NilN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/A
Secchi Disk Depth (m)1.80.60.51.00.40.50.90.60.51.31.20.40.50.91.31.10.60.90.3
Temperature(oC)21.525.223.423.321.723.123.024.024.024.322.524.125.222.321.821.722.823.024.7
Dissolved Oxygen (mg/L)8.611.512.610.917.98.69.98.712.59.09.213.816.38.810.110.37.89.88.1
Dissolved Oxygen Saturation (%)97140147128.1197.7100.9117.2102.5150.3107.7106.6168.7201.0100.8113.9115.390.9115.498.3
Specific Conductivity (μS/cm)510.0410.0460.0460.0530.0483.3460.0436.7396.7440.0523.3419.1467.4500.5549.3548.3635.4524.5487.5
Turbidity (NTU)4.524.528.519.228.425.016.617.933.320.218.256.3275.5294.673.316.221.986.174.0
Chlorophyll a (μg/L)6.2119.880.168.766.029.225.031.163.548.011.3179.8101.3186.856.526.449.756.444.9
Total Phosphorus as P (μg/L)95.5238.7250.5194.9306223173.653.1110.5160.2210.9241131226202282236202-
SRP as P (μg/L)53.983.297.778.3174.2131.699.6<10<1155.8121.013.31.1122.2100.8173.797.0--
TKN (mg/L)2.072.722.482.422.401.852.231.992.481.51---------
Total Dissolved Solids (g/L)0.30.30.30.30.30.30.30.30.3----------
Total Nitrogen as N (mg/L)----------1.82.582.293.192.662.702.464.122.14
(Phenate)Ammonia Nitrogen (NH3 + NH4+) as N (μg/L)265.2058.7043.5512219615126329<145<136<130--------
(Phenate)Ammonia Nitrogen (NH3) as N (un-ionized)(μg/L)21261320231432<PQL<PQL<PQL<130--------
Nitrate + Nitrite (NO3 + NO2) as N (mg/L)2.060.28<0.0710.140.19<0.140<0.4<0.5-0.350.411.750.340.600.572.050.28
TN:TP ratio----------1013191415101027-
pH8.39.18.98.88.68.48.68.58.68.88.69.18.88.78.98.88.68.68.4
Alkalinity as CaCO3 (mg/L)200180214198246223203190180183252183202208234197231183205
Silica as Si (mg/L)-------------10.076.438.409.78--
Dissolved Organic Carbon (mg/L)42.4045.8952.5046.9326.621110.6010891126.429.499.2619.9819.9925.72--
Inorganic Suspended Solids (mg/L)345417137121010591469139932
Volatile Suspended Solids (mg/L)313129138811109<8251412979713
Total Suspended Solids (mg/L)5171713292014232019103428181721181745
Carlson Trophic State Index (Secchi)*52687061736962687056577269625759686278
Carlson Trophic State Index (Chl a)*48787472726462647169548276827063697068
Carlson Trophic State Index (TP)*708384808782796172778183748281868381-
*Index values generally range between 0 and 100, with increasing values indicating more eutrophic conditions.
       
 
 
 
Water Column Profiles
6/1/20167/19/20168/28/2016

Contact Limnology Laboratory, Iowa State University