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Comparison of (a) ln(LF/HF) and (b) △ln(LF/HF) between three ECDs (n = 32; no significant difference using repeated measures analysis of variance (ANOVA) with Bonferroni’s correction). The values are expressed as means ± standard errors. The erosion control dam and low and high-frequency power levels are abbreviated to ECD, LF, and HF, respectively.
