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Report Year: 2016
DeSoto Bend Lake, Harrison County
Summary Data Table
Parameter5/18/20166/28/20168/17/20162016201520142013201220112010200920072006200520042003200220012000
Lake Depth (m)6.05.04.55.25.95.85.65.76.87.16.0--5.55.56.05.25.76.6
Thermocline Depth (m)1.3NilNilN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/A
Secchi Disk Depth (m)0.50.50.40.50.60.40.40.41.01.40.7--0.70.51.10.80.80.5
Temperature(oC)16.627.726.823.722.222.923.123.915.823.424.4--24.822.424.727.222.826.1
Dissolved Oxygen (mg/L)10.75.79.68.78.67.78.27.912.17.16.9--7.98.77.88.97.49.9
Dissolved Oxygen Saturation (%)11073120100.797.789.794.192.9122.280.282.1--95.4100.991.7111.582.7124.6
Specific Conductivity (μS/cm)660.0680.0690.0676.7640.0620.0676.7756.7630.0625.0560.0--585.1530.7553.3561.1548.7588.8
Turbidity (NTU)19.0-21.520.313.821.323.623.124.84.912.1--156.733.415.116.026.926.6
Chlorophyll a (μg/L)27.449.967.448.243.336.141.539.221.022.426.0--56.249.514.423.736.016.3
Total Phosphorus as P (μg/L)109.5144.0227.9160.4112117124.496.717.454.269.5--771108581151-
SRP as P (μg/L)<2.89.933.714.28.1<5.6<14<10<11<8<9--3.84.63.83.1--
TKN (mg/L)<0.221.141.590.921.261.211.121.26<0.5<0.26---------
Total Dissolved Solids (g/L)0.40.40.50.40.40.40.40.50.4----------
Total Nitrogen as N (mg/L)----------1.7--1.071.211.140.951.421.39
(Phenate)Ammonia Nitrogen (NH3 + NH4+) as N (μg/L)<0.6328.05<0.610056<2677<14<145<136<130--------
(Phenate)Ammonia Nitrogen (NH3) as N (un-ionized)(μg/L)039-31260<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---0.220.170.120.130.190.12
TN:TP ratio----------23--1511151311-
pH8.38.38.48.38.48.38.48.28.38.18.3--8.48.58.58.68.17.9
Alkalinity as CaCO3 (mg/L)293302303299285253267297305264258--260212182261257275
Silica as Si (mg/L)-------------4.596.552.693.69--
Dissolved Organic Carbon (mg/L)57.7951.1867.0358.6723.0265.726<7.6<6.4<6.2--3.025.459.758.98--
Inorganic Suspended Solids (mg/L)511201212517161155--1012671214
Volatile Suspended Solids (mg/L)10101713817812<8<911--9145111216
Total Suspended Solids (mg/L)152137252022252816716--202611132329
Carlson Trophic State Index (Secchi)*7070757268747573605565--657059646370
Carlson Trophic State Index (Chl a)*6369726968666767606163--706957626658
Carlson Trophic State Index (TP)*7276827772737470456265--6772686776-
*Index values generally range between 0 and 100, with increasing values indicating more eutrophic conditions.
       
 
 
 
Water Column Profiles
5/18/20166/28/20168/17/2016

Contact Limnology Laboratory, Iowa State University