The Hydrologic Simulation Program–Python (HSP2 or HSPsquared) model is being developed by RESPEC as part of an internally funded research and development (R&D) project.

This first release of HSP2, finalized on 5/28/2019, was written and tested to work with Python 2.7 from the Anaconda distribution. The code depends on Tim Cera's HSPF toolboxes (wdmtoolbox, tstoolbox, and hspfbintoolbox) and their dependencies. Installation instructions are provided in the main ReadMe.

Hydrological modules were tested for Big Sioux River modeling in 2018.
Water quality modules have not yet been implemented.