![]() ![]() ![]() The distributed basin hydrological model can better represent the impact of soils, vegetation cover and land-use for the runoff process, which has become the development direction of the hydrological model. From the initial blueprint proposed by Freeze and Harlan in 1969 (FH69), distributed hydrological models have been developed for more than 50 years. Watershed hydrological modeling is an important approach for simulating and understanding watershed hydrologic processes. The feasibility and practicability of DFBMS are proven through its application in different study areas. DFBMS has different numerical schemes including conceptual and distributed models. Based on the underlying source code, the sharing uniform data structure, named DOSS, is proposed to accomplish the integration of a hydrological model and geographical information system (GIS), which is a new way of exploring temporal GIS. The HFUs concept is the most important component of DF-PMS, enabling the model to simulate the hydrological process with empirical equations or physical-based submodules. DF-PMS adopts different kinds of HFUs to simulate the whole watershed hydrological cycle. An area/region that has the same mechanism of runoff generation and/or movement is defined as one type of hydrological feature unit (HFU). DFBMS has two cores, which are the distributed-frame professional modeling system (DF-PMS) and the double-object sharing structure (DOSS). To better simulate the river basin hydrological cycle and to solve practical engineering application issues, this paper describes the distributed-framework basin modeling system (DFBMS), which concatenate a professional hydrological model system, a geographical integrated system, and a database management system.
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