Abstract
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. DFBMS has two cores, which are the distributed-frame professional modeling system (DF-PMS) and the double-object sharing structure (DOSS). An area/region that has the same mechanism of runoff generation and/or movement is defined as one type of hydrological feature unit (HFU). DF-PMS adopts different kinds of HFUs to simulate the whole watershed hydrological cycle. 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. 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. DFBMS has different numerical schemes including conceptual and distributed models. The feasibility and practicability of DFBMS are proven through its application in different study areas.
Highlights
When the water exchange occurs in one direction during the period or the variation of the time scale is large, the explicit coupling mode is applied for some interfaces of hydrological feature unit (HFU), such as the runoff generation of hilly sub-watershed HFU enter into the nearby hilly river HFU
We propose the concept of hydrologic computing units (HCUs) for the simulation of runoff generation and movement
The double-object sharing structure (DOSS) is proposed in this study, which is designed through the self-developed geographical information system (GIS) and professional models based on the underlying source code
Summary
Watershed hydrological modeling is an important approach for simulating and understanding watershed hydrologic processes [1]. To better understand the impact of the vegetation cover and soil dynamics on the hydrological process, the hydrological models are usually integrated with the geographic information system (GIS). The watershed resource management models are mainly dynamic This represents the issue of temporal GIS—it is hard to extend the analysis function of GIS for exsiting distributed hydrological models since they do not solve the application of procedural dynamic models. This series of four papers aims to introduce/develop the modeling system framework/structure, theories and methods of hydrological/hydraulic modeling, and various application case studies of the distributed-framework basin modeling system (DFBMS). The DFBMS has great advantages and efficiencies in modeling hydrologic and hydraulic responses in non-homogenous catchments
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