Analysis of the tidal characteristics along the tidal reach of Xijiang River based on high and low tide levels
By interpolation of high and low tide data and application of NS_TIDE model,the tidal characteristics of the tidal reach of Xijiang River(Makou-Dahengqin)were analyzed.Compared with cubic spline interpolation and linear interpolation,it is found that Hermite interpolation is the best method to simulate the hourly tide level.The verification results of tide level show that the overall error of NS_TIDE model is low,and the outliers mainly come from the influence of typhoon and flood.The mean water level and the amplitude of tidal component in the tidal reach of Xijiang River are different in wet and dry season.The influence of runoff in the upper reaches is greater than that of the tides,and the opposite is true in the lower reaches.With the increase of runoff and tidal difference,the mean water level of the upper reaches increases,and the influence on the amplitude and the phase of tidal component is different in different section,which is related to the spatial location and the frequency of the tidal component.
high and low water interpolationharmonic analysisriver dischargeocean tides
NETL
NSTL
万方数据
