Normal View    Print View

    

Report Year: 2016
Lake Darling, Washington County
Summary Data Table
Parameter5/25/20167/13/20168/24/20162016201520142013201220112010200920072006200520042003200220012000
Lake Depth (m)5.86.25.15.75.45.3-----4.64.64.54.84.74.84.95.1
Thermocline Depth (m)3.23.24.0N/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/A
Secchi Disk Depth (m)2.00.40.61.01.00.7-----0.20.70.50.21.00.30.50.4
Temperature(oC)22.927.025.225.024.526.6-----27.727.127.223.825.426.224.725.8
Dissolved Oxygen (mg/L)8.612.87.39.611.613.1-----10.010.515.710.39.67.87.16.5
Dissolved Oxygen Saturation (%)10016189116.4140.1163.2-----127.3132.1197.9126.9118.498.380.479.3
Specific Conductivity (μS/cm)370.0290.0210.0290.0303.3250.0-----245.3334.0347.5242.0284.8384.3238.2275.1
Turbidity (NTU)2.418.220.513.715.819.9-----32.616.7124.8188.319.8212.2180.0109.4
Chlorophyll a (μg/L)5.869.336.437.229.989.6-----29.733.2266.589.412.933.027.85.2
Total Phosphorus as P (μg/L)67.9128.6232.0142.8107298-----1797912022899232256-
SRP as P (μg/L)12.1<2.8104.139.310.1166.4-----49.2<11.692.313.9101.5--
TKN (mg/L)1.001.311.461.251.442.18-------------
Total Dissolved Solids (g/L)0.20.20.10.20.20.2-------------
Total Nitrogen as N (mg/L)-----------4.133.492.774.711.693.975.182.47
(Phenate)Ammonia Nitrogen (NH3 + NH4+) as N (μg/L)142.05<0.636.805272<26-------------
(Phenate)Ammonia Nitrogen (NH3) as N (un-ionized)(μg/L)6-124-1391-------------
Nitrate + Nitrite (NO3 + NO2) as N (mg/L)3.45<0.07<0.0710.600.12-----2.851.921.793.520.241.694.113.06
TN:TP ratio-----------22594225192126-
pH8.09.38.38.58.69.1-----8.48.79.28.68.48.27.77.8
Alkalinity as CaCO3 (mg/L)1201088810511397-----8111010771809584132
Silica as Si (mg/L)-------------2.1810.301.8815.44--
Dissolved Organic Carbon (mg/L)26.2126.0725.2525.8414.689-----5.796.137.136.0310.169.05--
Inorganic Suspended Solids (mg/L)423333-----2878539354517
Volatile Suspended Solids (mg/L)<11097913-----10101521710129
Total Suspended Solids (mg/L)41212101216-----3416237417445726
Carlson Trophic State Index (Secchi)*507267606065-----8165728260787173
Carlson Trophic State Index (Chl a)*487266666475-----6465857556656347
Carlson Trophic State Index (TP)*657483767186-----79677382708384-
*Index values generally range between 0 and 100, with increasing values indicating more eutrophic conditions.
       
 
 
 
Water Column Profiles
5/25/20167/13/20168/24/2016

Contact Limnology Laboratory, Iowa State University