Abstract
A method of over-water wind velocity correction, using land-based wind data, was applied to a hydrodynamics simulation in a large lake based on a roughness change compensation combined with two-dimensional effective fetch concept. Wind speed could be accelerated as much as 1.4 times when wind moves from land to water surface at a 10 km fetch. The wind speed increase corresponds to doubling of wind shear stress, suggesting its significant effect on hydrodynamics.Compared with uncorrected simulation results, the corrected approach reproduced significantly more accurate water level variations particularly under strong winds, pointing to the need of such land-to-water wind modification for precise modeling of hydrodynamics of large water bodies.
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