Modeling Normal and Extreme Wave Conditions in Callao Bay, Peru using Reanalysis Data Rafael Pimentel a , Emanuel Guzman b and Carmela Ramos c Facultad y Escuela de Ingeniería Civil, Universidad Peruana de Ciencias Aplicadas, Av. Prolongación Primavera 2390, Santiago de Surco, Lima, Peru Keywords: Numerical Wave Modelling, Callao Bay. Abstract: Numerical simulations of wave conditions in Callao bay in normal and extreme conditions were carried out to characterize the wave dynamics in the bay. Bathymetry data from the navigation charts to represent bottom depth were used. Waves in deep waters from numerical reanalysis were calibrated with satellite data that have allowed define scenarios of wave propagation to shallow water in normal and extreme conditions. Model results were compared with in situ wave data obtaining good approximation between modeling and observed waves. Results indicates that waves coming from Southwest and South-Southwest, which is the most predominant waves in deep waters, due to the diffraction effects caused by San Lorenzo Island generate two areas with different wave height conditions, in this way in the area affected by diffraction wave reach height between 0.5 to 1m, while area unaffected by diffraction effects wave reach heigh between 2 to 5m. Waves coming from Northwest has more influence in the bay, due to diffraction effects are neglected and in general terms all the bay increase the wave height around to 2 to 5m. 1 INTRODUCTION The study and knowledge of waves in coastal areas are important due to the impacts that can occur in them, such as coastal flooding and the erosion and sedimentation processes in coastlines. Some numerical Simulation Investigations performed Along the North Coast of the United States projected an increase in wave height (Erikson et.al, 2015), which may have an impact on the increase in sea level on flooded shores (Ruggiero, 2013). Numerical simulations of coastal flooding carried out in California and other coastal areas of the USA indicate that there would be a loss of 150 billion dollars due to coastal inundation by waves an sea level (Barnard et.al, 2019), Gainza et.al 2018 applied a numerical modeling of tidal and wave factors to predict the advance of the sea in the territory of Gold Coast, Australia. The study area is located in central part of Peru in the Constitutional Province of Callao (Figure 1), and currently is the third most populated province in Peru a https://orcid.org/0000-0002-4155-3563 b https://orcid.org/0000-0001-8381-4509 c https://orcid.org/0000-0002-4269-2944 with an annual growth population rate of 1.3%, (INEI, 2018). Figure 1: Location of the study area. Likewise, the study area is considered as a tourist place due to its beaches like Chucuito, and Cantolao beaches, gastronomy, and architecture like Real Felipe Castle. Another important aspect is that Callao Port, Pimentel, R., Guzman, E. and Ramos, C. Modeling Normal and Extreme Wave Conditions in Callao Bay, Peru using Reanalysis Data. DOI: 10.5220/0010458901950202 In Proceedings of the 7th International Conference on Geographical Information Systems Theory, Applications and Management (GISTAM 2021), pages 195-202 ISBN: 978-989-758-503-6 Copyright c  2021 by SCITEPRESS – Science and Technology Publications, Lda. All rights reserved 195