Exploration and Graphics for RivEr Trends (EGRET):
Exploration and Graphics for RivEr Trends (`EGRET`):
An R-package for the analysis of long-term changes in water quality and streamflow,
An R-package for the analysis of long-term changes in water quality and streamflow,
including the water-quality method Weighted Regressions on Time, Discharge, and Season (WRTDS)
including the water-quality method Weighted Regressions on Time, Discharge, and Season (WRTDS)
Overview of EGRET: The following are 4 major features of `EGRET`.
Overview of `EGRET`: The following are 4 major features of `EGRET`.
1. It is designed to obtain its water quality sample data, streamflow data, and metadata directly from the USGS NWIS (United States Geological Survey National Water Information System), but it allows for user-supplied text files as inputs. The program is designed to ingest the data directly into R and structure them into file structures suited to the analysis. For those familiar with WRTDS_4c, the text file inputs used in that system will also work in EGRET.
1. It is designed to obtain its water quality sample data, streamflow data, and metadata directly from the USGS NWIS (United States Geological Survey National Water Information System), but it allows for user-supplied text files as inputs. The program is designed to ingest the data directly into R and structure them into file structures suited to the analysis. For those familiar with WRTDS_4c, the text file inputs used in that system will also work in EGRET.