Using Adjacent Buoy Information to Predict Wave Heights of Typhoons Offshore of Northeastern Taiwan

Abstract

In the northeastern sea area of Taiwan, typhoon-induced long waves often cause rogue waves that endanger human lives. Therefore, having the ability to predict wave height during the typhoon period is critical. The Central Weather Bureau maintains the Longdong and Guishandao buoys in the northeastern sea area of Taiwan to conduct long-term monitoring and collect oceanographic data. However, records have often become lost and the buoys have suffered other malfunctions, causing a lack of complete information concerning wind-generated waves. The goal of the present study was to determine the feasibility of using information collected from the adjacent buoy to predict waves. In addition, the effects of various factors such as the path of a typhoon on the prediction accuracy of data from both buoys are discussed herein. This study established a prediction model, and two scenarios were used to assess the performance: Scenario 1 included information from the adjacent buoy and Scenario 2 did not. An artificial neural network was used to establish the wave height prediction model. The research results demonstrated that (1) Scenario 1 achieved superior performance with respect to absolute errors, relative errors, and efficiency coefficient (CE) compared with Scenario 2; (2) the CE of Longdong (0.802) was higher than that of Guishandao (0.565); and (3) various types of typhoon paths were observed by examining each typhoon. The present study successfully determined the feasibility of using information from the adjacent buoy to predict waves. In addition, the effects of various factors such as the path of a typhoon on the prediction accuracy of both buoys were also discussed.

Evaluation of Photovoltaic Power Generation by Using Deep Learning in Solar Panels Installed in Buildings

“…Similar to shallow neural networks, DNNs establish models based on complex nonlinear systems; however, multiple hidden layers are included to enhance the learning efficacy of these models and thereby their prediction and categorization capability. Most DNNs are constructed as feedforward neural networks [65]. DNNs are trained through backpropagation.…”

An Experimental Assessment of Extreme Wave Evaluation by Integrating Model and Wave Buoy Data

“…The previously mentioned work by Niroomandi et al[9] makes use of wave hindcast from the NCEP's Climate Forecast System and a SWAN wave model validated with buoy measurement, to characterize their temporal and spatial variabilities of extreme SWH. Applications of wave models to risk assessment have been reported, among others, in [20,21].Other useful results are provided in [22], where a 44-year long wave hindcast data base built up with a WAVEWATCH-III model were used to produce statistics on extreme SWH and compared with buoy data in the Biscay bay. In [23], data produced by SWAVE wave model driven by ECMWF ERA-Interim wind data were used to compute SWH 100 years extreme values in various locations.…”

“…[9] makes use of wave hindcast from the NCEP's Climate Forecast System and a SWAN wave model validated with buoy measurement, to characterize their temporal and spatial variabilities of extreme SWH. Applications of wave models to risk assessment have been reported, among others, in [20,21].…”