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Report Year: 2016
Ottumwa Central Park Ponds, Wapello County
Summary Data Table
Parameter5/25/20167/13/20168/26/20162016201520142013201220112010200920072006200520042003200220012000
Lake Depth (m)1.20.91.21.1--1.4-----2.02.12.02.32.32.31.9
Thermocline Depth (m)NilNilNilN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/A
Secchi Disk Depth (m)0.50.40.40.4--0.2-----0.30.30.20.90.30.40.2
Temperature(oC)22.927.324.424.9--25.9-----27.428.523.624.926.225.427.1
Dissolved Oxygen (mg/L)12.25.910.29.4--6.6-----7.410.09.58.86.418.711.4
Dissolved Oxygen Saturation (%)14274122112.8--81.5-----93.5131.7113.5104.781.2231.7146.0
Specific Conductivity (μS/cm)600.0420.0460.0493.3--690.0-----574.0555.1393.5555.5532.8398.9438.1
Turbidity (NTU)30.319.718.122.7--33.7-----58.834.6135.857.868.770.1277.7
Chlorophyll a (μg/L)46.945.352.248.1--76.7-----179.6195.799.721.093.9149.89.9
Total Phosphorus as P (μg/L)190.7126.6121.3146.2--309.5-----352268270382256309-
SRP as P (μg/L)<2.8<2.8<2.8<2.8--19.1-----25.118.832.876.634.6--
TKN (mg/L)1.171.041.081.09--1.82------------
Total Dissolved Solids (g/L)0.40.30.30.3--0.5------------
Total Nitrogen as N (mg/L)------------2.521.772.563.111.772.611.62
(Phenate)Ammonia Nitrogen (NH3 + NH4+) as N (μg/L)<0.622.10<0.61--<10------------
(Phenate)Ammonia Nitrogen (NH3) as N (un-ionized)(μg/L)01-10--<PRL------------
Nitrate + Nitrite (NO3 + NO2) as N (mg/L)<0.070.09<0.07<0.07--<0.14-----0.180.120.170.750.410.260.18
TN:TP ratio------------779979-
pH8.17.98.18.0--7.8-----7.98.08.18.07.87.77.5
Alkalinity as CaCO3 (mg/L)167128159151--210-----164163128121161122199
Silica as Si (mg/L)-------------8.477.987.797.22--
Dissolved Organic Carbon (mg/L)33.6929.9038.5534.05--4.92-----6.277.293.849.469.58--
Inorganic Suspended Solids (mg/L)31161119--29-----2955821231522
Volatile Suspended Solids (mg/L)138910--19-----268221812116
Total Suspended Solids (mg/L)44242130--48-----55198039352628
Carlson Trophic State Index (Secchi)*71757473--81-----78798462797482
Carlson Trophic State Index (Chl a)*68686969--73-----82827660758053
Carlson Trophic State Index (TP)*80747376--87-----898585908487-
*Index values generally range between 0 and 100, with increasing values indicating more eutrophic conditions.
       
 
 
 
Water Column Profiles
5/25/20167/13/20168/26/2016

Contact Limnology Laboratory, Iowa State University