The majority of the work for release 2.1.7 was directed to improving the Simple Volumetric Model (SVM). This model uses the Delaunay triangulation to model reservoir capacity with respect to changing water levels. Improvements to the module included better integration with standard GIS utilities, including the ability to export GIS-compatible contours in shapefile format and raster data in floating-point grid format. In support of these changes, the GIS module was improved for better shapefile support.
A number of other bugs and code clean up changes were also implemented.