A New Generation Numerical Modelling Tool for Hydrological Simulation: Spatiotemporal-Varied-Source-Mixed Runoff Model for Small Watershed

With the development of hydroinformatics and computer technology, a new generation of hydrological modeling software is required to satisfy the users' demands for simulation accuracy and to comply with the progress of big data analysis and intelligent technology. This paper has proposed an Object and Modular-based Hydrological Modeling System (OMHMS) applied for the new generation modular software for hydrological simulation. This software was based on functionally flexible module library and SQLite lightweight database. The core of this model is the spatiotemporal variable-source mixed runoff model which enables parallel computation of models in space, time and subprocess. To reach the objectives including modularization, parameterization, intelligence, visualization and automation, the model has been applied in many small watersheds in China with favorable results. In particular, the model has been integrated into the flood system of Henan Province and run for many years for flood forecasting. The model shown high-level of applicability to be implemented in the small watershed of China with or without sufficient observation.