Estimated Annual Loads File Formation Information

Field Name                       Description
SITECODE                         Arbitrary site code based on the pool of the Upper Mississippi River that the tributary enters
AGENCY CODE                      Station identification code used by monitoring agency that collected concentration data
YEAR                             Year of load estimate
DISCHARGE (MILLIONS of M3/ Year) Cumulative discharge of water for the site for the year
TN_N1 (Metric Tons/Year)         Annual (calendar year) load estimate of total nitrogen from the maximum likelihood of best-fit model
TN_N2 (Metric Tons/Year)         Annual (calendar year) load estimate of total nitrogen from the linear attribution estimate of best-fit model
TN_N3 (Metric Tons/Year)         Annual (calendar year) load estimate of total nitrogen from the least absolute deviation of best-fit model
NOx_N1 (Metric Tons/Year)        Annual (calendar year) load estimate of nitrate + nitrite from the maximum likelihood of best-fit model
NOx_N2 (Metric Tons/Year)        Annual (calendar year) load estimate of nitrate + nitrite from the linear attribution estimate of best-fit model
NOx_N3 (Metric Tons/Year)        Annual (calendar year) load estimate of nitrate + nitrite from the least absolute deviation of best-fit model
NHx_N1 (Metric Tons/Year)        Annual (calendar year) load estimate of total ammonia from the maximum likelihood of best-fit model
NHx_N2 (Metric Tons/Year)        Annual (calendar year) load estimate of total ammonia from the linear attribution estimate of best-fit model
NHx_N3 (Metric Tons/Year)        Annual (calendar year) load estimate of total ammonia from the least absolute deviation of best-fit model
TP_P1 (Metric Tons/Year)         Annual (calendar year) load estimate of total phosphorus from the maximum likelihood of best-fit model
TP_P2 (Metric Tons/Year)         Annual (calendar year) load estimate of total phosphorus from the linear attribution estimate of best-fit model
TP_P3 (Metric Tons/Year)         Annual (calendar year) load estimate of total phosphorus from the least absolute deviation of best-fit model
SRP_P1 (Metric Tons/Year)        Annual (calendar year) load estimate of soluble reactive phosphorus from the maximum likelihood of best-fit model
SRP_P2 (Metric Tons/Year)        Annual (calendar year) load estimate of soluble reactive phosphorus from the linear attribution estimate of best-fit model
SRP_P3 (Metric Tons/Year)        Annual (calendar year) load estimate of soluble reactive phosphorus from the least absolute deviation of best-fit model
TSS1 (Metric Tons/Year)          Annual (calendar year) load estimate of total suspended solids from the maximum likelihood of best-fit model
TSS2 (Metric Tons/Year)          Annual (calendar year) load estimate of total suspended solids from the linear attribution estimate of best-fit model
TSS3 (Metric Tons/Year)          Annual (calendar year) load estimate of total suspended solids from the least absolute deviation of best-fit model
CL1 (Metric Tons/Year)           Annual (calendar year) load estimate of chloride from the maximum likelihood of best-fit model
CL2 (Metric Tons/Year)           Annual (calendar year) load estimate of chloride from the linear attribution estimate of best-fit model
CL3 (Metric Tons/Year)           Annual (calendar year) load estimate of chloride from the least absolute deviation of best-fit model
SiO2_Si1 (Metric Tons/Year)      Annual (calendar year) load estimate of silicate silica from the maximum likelihood of best-fit model
SiO2_Si2 (Metric Tons/Year)      Annual (calendar year) load estimate of silicate silica from the linear attribution estimate of best-fit model
SiO2_Si3 (Metric Tons/Year)      Annual (calendar year) load estimate of silicate silica from the least absolute deviation of best-fit model