PIHMgis Version 3.0 Software Author: Gopal Bhatt Penn State University Bhatt, G., Kumar, M., Duffy, C., 2014. A Tightly Coupled GIS and Distributed Hydrologic Modeling Framework, Environmental Modelling & Software, Vol. 62, pp. 70–84 Highlights • A coupled GIS and distributed hydrologic modeling framework, PIHMgis was developed. • PIHMgis uses national geospatial dataset to setup, execute, and analyze simulations. • Procedural framework improves model-data integration using shared geodata model. PIHMgis is an open-source, platform independent, tightly coupled GIS and distributed hydrologic modeling framework (www.pihm.psu.edu). PIHMgis improves model-data integration, and provides functionalities for watershed delineation, domain decomposition, parameter assignment, simulation, visualization and analyses.