Tidal Current - IntroductionChang Hsien Kuo
102321
NRCEST2ADCP: Acoustic Doppler Current Profilers Multi-layers (Three or ten Layers)Equipment: ADCP
2.5343Velocity : knot(0.51m/s) Azimuth: the current flows to that direction wind or wave comes from that directionData Acquisition
3.53434
1011123
NRCEST45Data analysis methods in physical oceangraphy: Emery and Thomson (1998) p.325-327 (scatter plot):
5.5346
6.5347
7.534
8Wiegel (2005) :(wind driven current)(wave induced current)(tidal current)(ocean current)
(scatter plot):(covariance matrix)(Freeland et al., 1975; Preisendorfer , 1988)
20098.534
920099.53410(centroid of scatter plot)(minimum inertia moment about main axes)(maximum probability density of directional distribution)10.53411
(cluster analysis): Kmeans
1200911.534121/3
12.53413
13.53414
---Ksdensity
14.53415
6
8 15.53416612336423165224562425923958234552415623957236582385723961239345273581896718362433821038211152433222838223412213422639219:2-3180 :405018016.534Harmonic Analysis for tidal current17Vector (two-dimensional variables)E&N or (L&N) componentsHarmonic Analysis for Ui and Vi
Rotary component spectra 18Emery and Thomson (1998) p.427-431)
Rotary component spectra 19
Rotary component spectra 20
Rotary component spectra 21
Rotary component spectra 22
Rotary component spectra Major axis
Minor axis
Tilting angle
Flatness
23
EvaluationRMSE
R2(determination of coefficient)
24
Main components of tides and tidal current 25
Taipei Harbor
Main compinents of tides and tidal current 26 KaoHsiung Harbor
Astronomical tides27
Numerically simulated tides for Taipei and Anping harbor
U-component of tidal current 28
V-component of tidal current 29
Main components of tides and tidal current 30 St.T&C12345678910TPTideM2K1O1S2N2P1K2Q1Ssa2Cur.M2S2N2K1K2SaM4MsfO12TCTideM2S2N2K1O1K2SaL222Cur.SaSsaM2K1MmMsfO1S2MfP1APTideM2K1O1S2P1N2Q1SsaK2SaCur.M2S2SaK1N2S1O11SsaK2KHTideK1M2O1SaS2SsaP1N2Q1K2Cur.K1M2O1S2SaP11N2S1SsaHLTideM2S2SaK1O1N2K2P1SsaQ1Cur.M2S1SaK1S2M4Ms4K22O1SATideM2K1O1S2SaN2P1K2Q12Cur.M2SaS2K1O1S1K2M4MsfN2KLTideM2K1O1SaP1N2S2Q12K2Cur.M2S2N2Sa2M4SsaOp2L2Mks230Main components of tides31
Main components of tides and tidal current 32
Main components of tides and tidal current 33
Main components of tides and tidal current 34
Main components of tides and tidal current 35
Main components of tidal current 36
Main components of tidal current 37
Main components of tidal current 38