release.txt

                           Groundwater Toolbox Release Notes

This file describes changes introduced into the USGS Groundwater Toolbox with each
official release.

Version 1.3.1; May 26, 2017
   A small bug was found in the version 1.3 release in which some of the existing
   source code was not correctly loaded into the released version. The bug was
   corrected. This version also includes a new tutorial that describes two new 
   enhancements to the Toolbox: 1. the 'Get Newest' option to download the most 
   recent time-series data for an existing project and 2. an update to the software
   that allows time-series values generated in Interactive mode of the Base-Flow 
   Separation functionality to be easily reloaded into a new Toolbox session.

Version 1.3; April 15, 2017
   This version includes the following enhancements:

   a. The addition of two digital-filtering techniques (the SWAT Bflow and Eckhardt
      approaches) for hydrograph separation (see tutorial 'Digital_Filters.pdf' in 
      the docs\Tutorials subdirectory).
   b. An update to the RECESS functionality to estimate a basin-wide base-flow
      recession constant and master recession curve, particularly enhancements to 
      the generation and presentation of master recession curves (see tutorial
      'RECESS_update.pdf' in the docs\Tutorials subdirectory).

Version 1.2; October 1, 2016
   This version includes the following enhancements and changes:

   a. Batch-file Processing and other modifications for Hydrograph-Separation 
      Analyses (see tutorial 'Hydrograph_Separation_Updates.pdf' in the
      docs\Tutorials subdirectory).
   b. Added improved functionality to work with time-series data, including
      the base-flow and runoff time series calculated by the Hydrograph-Separation 
      methods. This functionality includes updates to the Kendall-Tau trends
      functionality and preprocessing of time series using subsetting, splitting, and
      other manipulations (see tutorial 'Updated_TimeSeries_Functionality.pdf'in the
      docs\Tutorials subdirectory).
   c. Modifications to the software to be able to work with changes made by the USGS
      in June 2016 related to the RDB (relational data base) formatting of streamgage
      data.
		
Version 1.1.1;  October 20, 2015
   The functionality of this version is the same as version 1.1. The software was 
   modified to access new locations of the data coverages on U.S. Environmental 
   Protection Agency computers.


Version 1.1;  April 30, 2015
   This version includes fixes to a bug that were causing Periodic Groundwater Levels 
   to plot incorrectly. Some users also had noted flow-duration curves that did not 
   plot correctly, and those problems have been resolved.
 
   This version also includes two tutorials on how to import streamflow data into the  
   Groundwater Toolbox. These tutorials were prepared in response to several queries to 
   the code developers regarding how to import streamflow data that are not archived in 
   the USGS NWIS system. Both tutorials use as examples streamflow data stored in Excel 
   files. The tutorials are located in the 'docs\Tutorials' subdirectory. Also, the  
   initial version of the GW Toolbox had an Open Data option to read input from an Excel 
   file. That functionality was not working as intended and has been removed.


Version 1.0;  January 9, 2015
   Initial release of software. Build date of software is January 5, 2015.

   Note that when using the 'County' option to build a new Groundwater Toolbox project, 
   a dialog box may appear that indicates that there are no nhd (National Hydrography 
   Dataset) data available for Hydrologic Unit Code 01100007 (Long Island Sound. 
   Connecticut). That dialog box can be ignored (hit 'OK'), and the build process should 
   continue successfully.

   Also note that the 'States' option to build a new Groundwater Toolbox project is not 
   fully functional for some states. Users are advised to avoid using this option until 
   further notice.