Apparatus and associated methods relate to a self-contained ocean data and acquisition module (SCODAM) configured to mount to a floating body and having a sensor array, geospatial locating engine, wave measurement engine, communication engine to transmit collected data to a remote device, an energy conversion module adapted to convert ambient energy inputs into electrical energy, and an energy storage module configured to receive the converted electrical energy and to supply operating power to the SCODAM. In an illustrative example, the SCODAM may be configured to generate a transfer function based on motion characterization data obtained in a training mode corresponding to motion of the floating body in response to perturbation in a predetermined sequence and to apply the transfer function data obtained by the wave measurement engine to determine wave motion. Various embodiments may advantageously facilitate use of an existing floating body as an ocean data acquisition system (ODAS).

A method of making and a computer readable media having data readable by a fish finder are provided. The data includes a topographical fishing map usable by the fish finder to display bathymetric information regarding a body of water, and a number of water current flow simulations. Any of the number of simulations is selectable via the user input and usable by the fish finder to display water current flow as a layer on the bathymetric information regarding a body of water. Freshwater currents or saltwater tides may be provided in certain embodiments. The method includes inputting the bathymetric information from the topographical fishing map and current flow conditions to the processor, processing a hydrodynamic or tidal modeling program and storing the water current flow simulation as a user selectable layer on the media on which the topographical fishing map is stored.

A comprehensive reconstruction method for long-series sediment data in data-lacking areas includes steps of: collecting hydrological and sediment data of a target river section; calculating sediment data in data-rich years with a flow-sediment content annual relationship curve method; calculating sediment data in only water quality and sediment test years with a correlation method between water quality and sediment data and hydrological station sediment data; calculating sediment data in data-lacking years with an adjacent station same year flow-sediment content relationship curve method; and calculating sediment data in remaining years with a multi-year average flow-sediment content relationship curve method. The method comprehensively adopts four methods to reconstruct the long-series sediment data based on sediment actual observation and characteristics in the data-lacking areas, which can make up for the limitations and deficiencies between the four methods, and the required data is easier to collect than those in the conventional methods.

A method for continuous measurement of river flow based on satellite big data is provided. The method includes: determining a river reach to conduct flow measurement, reconstructing a cross section of a river channel based on satellite big data, calculating real-time water levels by coupling data of various types of satellites, and performing flow calculation and compilation. The method solves the difficult problem of river flow measurement or continuous measurement of river flow in uninhabited areas, fills the blank of satellite-based flow measurement according to the principle of river dynamics, and greatly expands the range of river flow measurement.

Disclosed is a method and device suitable for detection of and warning against tsunamis. The device is located in the water at sea. The device includes a vessel, a sensor for measuring a physical quantity of the surrounding water, a control unit inside the vessel and operatively connected to the sensor, and a communication element including a transmitter for communicating with an external receiver that the predetermined condition relating to the physical quantity is fulfilled. The device further includes a ballast tank inside the vessel. The interior of the ballast tank is connected to the outside of the vessel. A pump pumps water from the ballast tank to outside the vessel. The overall density of the device exceeds the density of the surrounding water when the ballast tank is filled, and is less than the density of the surrounding water when the ballast tank is empty of water.

A tidal current display data generation apparatus for a movable body, for displaying tidal current information on a display screen, includes a tidal current information receiving terminal configured to receive tidal current information including a position of a tidal current on a chart of a region including the movable body, and a plurality of predicted tidal current directions of the tidal current at the position at a corresponding plurality of time instants, and a tidal current display data generation terminal configured to generate an indicator including a time scale determined according to the plurality of time instants, determine position of each predicted tidal current direction on the time scale at respective time instant, generate a plurality of symbols for respective positions on the time scale, each symbol indicating respective predicted tidal current direction at respective time instant, and output the indicator including the plurality of symbols to the display screen.

A method for continuous measurement of river flow based on satellite big data is provided. The method includes: determining a river reach to conduct flow measurement, reconstructing a cross section of a river channel based on satellite big data, calculating real-time water levels by coupling data of various types of satellites, and performing flow calculation and compilation. The method solves the difficult problem of river flow measurement or continuous measurement of river flow in uninhabited areas, fills the blank of satellite-based flow measurement according to the principle of river dynamics, and greatly expands the range of river flow measurement.

The invention relates to a method for determining a water current velocity profile in a water column by registration of a deviation between a first position and a second position of an underwater vehicle travelling in the water column. A batch of underwater vehicles is deployed from a surface vessel into the water. The vehicle(s) steers to the first position, which for the first batch is a predefined estimated position (PEP). The vehicle is by first means recording the second position, which is the actual position (AP). The difference ΔP between the predefined estimated position PEP and the actual position is registered and based on the difference a deviation data set is calculated. An updated current profile or stack of horizontal water current velocities UV is determined.

Systems and methods herein provide for floating sensors. In one embodiment, a system includes a waterproof housing, an electronics assembly mounted within the waterproof housing, and a wing structure hingeably attached to the waterproof housing and operable to float the system on a water surface. The system also includes a solar panel configured on the wing structure to provide power to the electronics assembly.

An ecological flow determination method for considering a lifting amount a belongs to a technical field of environmental engineering and includes the following steps: collecting, by a collecting device, data needed to calculate an ecological flow; determining, by a calculating device, an ecological base flow; selecting an upper limit and a lower limit of the ecological base flow so as to determine a range of the ecological base flow; verifying the lower limit of the ecological base flow; calculating water demands of landscape wetland, sediment discharge and dilution self purification of three service objects; comparing the water demands of the three service objects so as to determine the lifting amount, and finding out a minimum value and a maximum value to determine a lower limit and an upper limit of the lifting amount in the range; combining the ecological base flow and the lifting amount to determine the ecological flow.