Suspended sediment, total nitrogen, and total phosphorus loads for Iroquois River near Foresman, Indiana, April 2015 to July 2018

This data release contains the calibration data set and R code used to create regression models for estimating daily loads of suspended sediment, total nitrogen, and total phosphorus at the Iroquois River near Foresman, Indiana streamgage (05524500). The USGS R software package, rloadest, was used to develop the regression models and estimate loads. The models were developed using discrete water-quality data and concurrent daily streamflow data measured/determined at the streamgage for the period April 2015 through July 2018. Also included in this data release is the input data set of daily streamflow data and the daily load output data sets that were produced by the regression models. Summary information for the model development for each constituent are included in this data release.

本数据发布包包含用于构建回归模型的校准数据集与R代码，这些模型用于估算印第安纳州福斯曼附近易洛魁河河道水文测站（05524500）的悬浮泥沙、总氮及总磷日负荷量。本次建模与负荷量估算工作采用美国地质调查局（USGS）的R软件包rloadest完成。模型开发所用的离散水质数据与同步日流量数据，均采集自该测站2015年4月至2018年7月的观测时段。本数据发布包同时涵盖回归模型生成的日流量输入数据集与日负荷输出数据集。此外，数据包还收录了各污染物组分的模型开发汇总信息。