Reanalysis of Wind-Wave Growth in a Lake Using Kitaigorodskii's Similarity Theory

Código

XXVI-SBRH0789

Autores

Diego Andrés Casas Toro, Tobias Bernward Bleninger, Adolf Konrad Stips

Tema

G - Engenharia Hidráulica, de Sedimentos e Costeira

Resumo

Wind-generated wave processes remain challenging due to the intricate interplay of turbulent wind interactions and small-scale initial wave formation, and while empirical formulations like those of Pierson-Moskowitz and JONSWAP have advanced our understanding in ocean settings, some studies in lakes and reservoirs suggest that they fall short in capturing the dynamics in inland water bodies. This study reexamines the underlying framework of those well-established formulations--Kitaigorodskii's similarity theory--by reanalyzing wind?wave data from a large Swiss lake. Analysis of dimensionless fetch length and wave height parameters showed that, under sustained wind conditions, the observed wave growth aligns well with JONSWAP predictions; however, under weak winds, significant scatter is observed, likely due to sensor underestimation and uncertainties in estimating a constant fetch, combined with local morphological and orographic influences. These findings highlight the need for refined measurement techniques and data preprocessing methods to better account for local variability, showing that ocean-derived scaling laws could be applied to lake environments under careful consideration of their basic assumptions.