The Directorate of Hydrography and Navigation (DHN) from Peruvian Navy has implemented a coastal wave forecasting system at the principal bays from Peruvian coast for the purpose to provide early warnings due the extreme wave conditions, that allows to DHN order the close of the main ports for the safety of fishermen and ships. The model used was Delft3D-WAVE, which was used on a stationary basis and run daily in an operational manner. To corroborate the results obtained, it was validated with in situ measurements for approximately 1 year, obtaining a correlation coefficient of 0.62 in the wave height and 0.55 in the wave direction, between the measured and modeled. The results are available on the DHN website.

Wave Data in Deep water (outside wave generation zone at depth more than 500m) from 3 location in Perú were analyzed from 1979 to 2017 from NOAA reanalysis Data Base obtained with Wave Watch Simulation for global waves with 0.5°x0.5° spatial resolution. A time series was obtained to represent normal conditions and extreme event including El Niño and La Niña Phenomenon, thus extraordinary El Niño (EN) occurred in 1982-1983 and 1997-1998. Wave time series were calibrated with NOAA buoy data called 32012 from NDBC and satellite date obtained from GEOSAT, ENVISAT, JASON 1, ERS1, ERS2 y TOPEX/POSEIDON. Thus, a calibrated time series were obtained with an interval of 3 hours. Results shows that during EN the predominant significant wave height reached 1.5 to 2.5 m, and it represent an incremented around 1cm respect normal conditions, while wave period predominant range is around 13.5 to ...

The wave dynamics in Chancay Bay is represented by the Delft3D numerical model, whose application is referred to the propagation and calibration of the waves in the WAVE module through the Copernicus ERA5 database and comparison with field measurements of the hologram of the Directorate of Hydrography and Navigation. (DIHIDRONAV) for medium and maximum regime conditions, in order to determine the Run Up of waves in areas of human development with the Van Der Meer and Stem methodology. In this sense, the topography of the ALOS PALSAR sentinel was extracted to determine the flood zones within the coast, whose representation is given by the length and height of the wave reached.

To determinate the wave climate in deep water o˙ the Peruvian coast, instrumental data from satellite and buoys was employed to calibrate wave reanalysis from NCEP for the period 1979 to 2017. Wave data was calibrated using an exponential model described by Minguez et al. (2011). The results shows correlation coe°cient values between 0.7 to 0.9, also BIAS and RMSE showed acceptable values, which indicate a good approximation between both information databases. We have obtained wave information in deep waters which can be used to analyze average an extremely wave regimes to study coastal processes, and study the in˛uence of El NIÑO and La NIÑA phenomenon in the study area. This calibrated wave time series reveals that the average conditions for wave height is around 2 m, with maximum heights over 4 m. De predominant direction is from Southest for the northern and center zones, and So...