Iowa River at Wapello, IA (Agency code: 05465500)

Descriptive Statistics of Concentration Data (Milligrams/Liter)

                  TN_N     NOx_N     NHx_N      TP_P     SRP_P       TSS        Cl   SiO2_Si
Total obs. =       114       117        99       116        82       129       116       115
Start date =  02/10/78  11/10/77  10/18/79  11/10/77  11/03/81  04/26/76  11/10/77  11/10/77
End date   =  08/25/95  08/25/95  08/25/95  08/25/95  08/25/95  08/25/95  08/25/95  08/25/95
Mx smp int days=   111       111       111       111       111       655       111       111
Mean samp int=    56.7      56.0      59.1      56.5      62.3      55.2      56.5      57.0
Stdv samp int=    20.0      19.7      19.2      19.9      17.7      61.0      19.9      20.2
Mean conc. =      7.01      5.16     0.150     0.308     0.112     360.8      27.3      5.32
Stdev conc.=      2.75      2.83     0.245     0.167     0.070     570.8      12.4     14.19
Min conc.  =      1.20      0.10     0.000     0.050     0.010       4.0       8.4      0.00
25% conc.  =      5.20      3.50     0.020     0.205     0.060      95.0      20.0      2.15
Med. conc. =      6.75      5.30     0.060     0.270     0.110     153.0      25.0      4.44
75% conc.  =      8.60      7.00     0.140     0.375     0.150     380.0      29.5      6.08
Max conc.  =     15.00     15.00     1.600     1.000     0.290      3810      76.0     154.3

Flow summaries are in the LOADEST2 diagnostic information

TN_N    = Total Nitrogen (as N)
NOx_N   = Total Nitrate + Nitrite (as N)
NHx_N   = Dissolved Ammonia (as N)
TP_P    = Total Phosphorus (as P)
SRP_P   = Soluble Reactive Phosphorus (as P)
          (measured as Dissolved Orthophosphate) 
TSS     = Total Suspended Solids
Cl      = Dissolved Chloride (as Cl)
SiO2_Si = Dissolved Silicon (as Si)
          (Converted from original concentrations measured 
           as Dissolved Silica (as SiO2))