Journal
JOURNAL OF HYDROLOGIC ENGINEERING
Volume 26, Issue 2, Pages -Publisher
ASCE-AMER SOC CIVIL ENGINEERS
DOI: 10.1061/(ASCE)HE.1943-5584.0002028
Keywords
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Funding
- Department of Science and Technology, Government of India [DST/INSPIRE/04/2017/001936]
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A two-dimensional diffusive wave framework was proposed to model the interaction between flow through and outside porous media using a depth-integrated parabolic model suitable for field-scale simulations with zero temporal/convective accelerations. The effects of bed shear from bathymetry, roughness, and granular media properties were consolidated into a single hydraulic diffusivity coefficient. The framework was validated with standard analytical solutions and small-scale experimental results, demonstrating its capability for real-time simulation with a synthetic test case of irregular ground surfaces.
A two-dimensional diffusive wave framework is proposed for modeling interaction between flow through and outside porous media. The depth-integrated parabolic model was developed with an assumption of zero temporal/convective accelerations, making it appropriate for field-scale simulations. The effects of bed shear arising from the bathymetry, roughness, and properties of granular media are consolidated into a single hydraulic diffusivity coefficient. The equation is resolved in a structured finite-volume grid with implicit time stepping. The proposed framework was validated with a standard analytical solution and small-scale experimental results. A synthetic test case containing irregular ground surface demonstrated the capability of the proposed model for real-time simulation. (C) 2020 American Society of Civil Engineers.
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