Wang, X. and Liu, Y., 2020. Validation of wave runup models in a New Zealand context. In: Zheng, C.W.; Wang, Q.; Zhan, C., and Yang, S.B. (eds.), Air-Sea Interaction and Coastal Environments of the Maritime and Polar Silk Roads. Journal of Coastal Research, Special Issue No. 99, pp. 411–418. Coconut Creek (Florida), ISSN 0749-0208.
Runup is defined as the added water level above the still water level by waves. Accurate estimation of runup is essential for coastal protection, coastal management and hazard prediction. A video-based research was carried out in Gisborne and Mahia (New Zealand) to validate previously developed runup models in a New Zealand context and present locally adjusted models based on available models. A wave runup dataset containing 14 runup time series was produced. 5 previous models were tested with field observation. Among these models, the model proposed by Homan (1986) provides the most accurate predictions of R 2% . A locally adjusted model based on Homan (1986) yields improved results (R 2 = 82%). For Gisborne and Mahia, R 2% is best parameterized by beach slope. A new model parameterized beach slope produces even better results (R 2 = 83%). With information of beach slopes, it can be easily applicated to beaches around Gisborne and Mahia.