Fully coupled formulation of surface flow with 2-phase subsurface flow for hydrological simulation

✍ Scribed by Hiroyuki Tosaka; Kazumasa Itoh; Takashi Furuno

• Book ID: 101284366
• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 303 KB
• Volume: 14
• Category: Article
• ISSN: 0885-6087
• DOI: 10.1002/(sici)1099-1085(20000228)14:3<449::aid-hyp948>3.0.co;2-9

✦ Synopsis

With the aim of realizing a surface-subsurface-coupled ¯uid ¯ow simulation, the authors discuss surface ¯ow models that can be used in the framework of the 2-phase subsurface numerical simulation system. In this paper, three surface ¯ow models, i.e., a kinematic wave model (KW), a diusion wave model (DW), and a linearized diusion wave model (LDW), are explained by approximating the momentum equation, and are transformed into a set of nonlinear functions which can be solved simultaneously with the 2-phase subsurface ¯ow. By incorporating these into a 2-phase numerical simulation system, comparison studies are carried out using experimental data and a ®eld scale model. So far as the results of the study are concerned, it is concluded that the DW model gives reasonable performance for any case, the LDW model provides mostly identical results with the DW model with some restrictions, while the KW model is not applicable for the physical modelling of continuous ¯ow through multiple slopes with dierent angles.