The Simulator for Hydrologic Unstructured Domains (SHUD - pronounced “SHOULD”) is a multi-process, multi-scale integrated hydrological model using the semi-discrete Finite Volume Method.

Spatial structure: Unstructured mesh domain. Three vertical layers: land surface, unstructured and saturated layers.

Time-step: Adaptive time-step based on the spatial resolution and slow-fast hydrological processes. The time-step ranges from 1 ~ 60 seconds.

The SHUD modeling system is of quick, reproducible and automatic hydrological modeling.

SHUD encapsulates the strategy for synthesizing multi-state distributed hydrological models using the integral representation of the underlying physical process equations and state variables. As a heritage of Penn State Integrated Hydrologic Model (PIHM), the SHUD model is a continuation of 16 years of PIHM modeling in hydrology and related fields since the release of its first PIHM version (Qu, 2004).

SHUD Source Code
rSHUD Source Code