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The periodicity of an under water geyser in the Taketomi submarine hot spring in Yaeyama archipelago, Japan, has been investigated. We concluded the time cycle of the geyser responds to the tide, after conducting the time series analysis of the upward velocity taken by an acoustic Doppler current meter. The time cycles in high and low tide were 66 s and 41 s, respectively. In accordance with the Bunsen's...
A depth-averaged 2D numerical model is set up to simulate the hydrodynamics and salinity of the Changjiang Estuary with Delft3D-FLOW, which has been well calibrated and validated with the observed data of the tidal level, velocity and salinity of the Changjiang Estuary. The changes of the salinity under the different narrowing schemes in the North Branch of the Changjiang Estuary during a spring tide...
Tide-independent precise underwater topographic surveying technique is widely used in inshore hydrographic measurement. GPS RTK provides an accurate instantaneous height to transducer in the technique. However the instantaneous height easily suffers the influences of satellite status, vessel attitude and radio transmission and so on and becomes weak in quality. The low-quality instantaneous height...
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