JP4609940B2 - Method for detecting the flow condition of the ocean layer - Google Patents

Description

  The present invention relates to, for example, a method for detecting a flow state of an ocean layer for grasping the behavior of a liquid discharged into the ocean middle layer.

  In recent years, from the viewpoint of global warming, the sequestration of recovered carbon dioxide has been studied, and when isolating carbon dioxide into the ocean, the shape of the discharge tube and the pressure at the discharge site are optimally determined. (For example, see Patent Document 1 below). Also, elucidating the state of dilution of sequestered carbon dioxide in the ocean is useful for setting effective sequestration methods for carbon dioxide and grasping environmental changes.

  For this reason, it is important to grasp and predict the diffusion behavior and the influence range of carbon dioxide. In the ocean, tracking and understanding using fluorescent dyes and buoys are considered effective for understanding the flow and diffusion phenomena of matter. However, there is currently no technology for accurately tracking and grasping the middle layer of the ocean (for example, about 1000m to 3000m), and the diffusion behavior and influence range of carbon dioxide are accurate in the middle layer of about 1000m to 3000m. The actual situation is that we have not been able to grasp and predict.

JP 2000-70702 A

  The present invention has been made in view of the above situation, and an object of the present invention is to provide a method for detecting the flow state of the ocean layer, which can grasp the behavior of the discharged liquid even in the middle layer of the ocean.

  In order to achieve the above object, the first aspect of the present invention releases a tracer to an ocean layer at a predetermined depth and releases a buoy that maintains the predetermined depth, and predicts the spread of the tracer based on the behavior of the buoy. A method for detecting the flow state of an ocean layer, comprising: detecting a flow state of an ocean layer at a predetermined depth based on a flow state of a tracer in a flow direction and a flow state in a direction crossing the flow direction of the tracer. is there.

  In the first aspect, it is possible to grasp the spread of the fluorescent dye in the plane and in the depth direction in a state where the distribution / behavior of the tracer is predicted based on the behavior of the buoy. The behavior of the released liquid can be grasped.

  According to a second aspect of the present invention, in the first aspect, the tracer is a fluorescent dye, and the flow state of the ocean layer is derived based on the distribution and behavior of the diffusion of the fluorescent dye. In the situation detection method.

  In the second aspect, it is possible to grasp the distribution / behavior of dilution / diffusion of the released liquid based on the distribution / behavior of the diffusion of the fluorescent dye.

  According to a third aspect of the present invention, in the first or second aspect, a plurality of buoys are applied and different depths are maintained, respectively.

  In the third aspect, the distribution / behavior of the tracer diffusion can be predicted for each depth.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, data is collected and collected by an underwater transponder towed from a ship navigating offshore with the current position on the earth being grasped. The present invention provides a method for detecting the flow state of an ocean layer, wherein the flow state of a predetermined ocean layer is derived based on data from an underwater responder.

  In the fourth aspect, the flow situation of the predetermined ocean layer can be derived based on the data from the underwater responder towed to the ocean layer at the predetermined depth.

  According to a fifth aspect of the present invention, in the fourth aspect, there is an ocean layer flow condition detection method according to the fourth aspect, wherein the communication by the underwater responder is acoustic communication.

  In the fifth aspect, data communication can be performed by acoustic communication.

  According to a sixth aspect of the present invention, in any one of the fourth and fifth aspects, the underwater responder corresponds to the depth of the buoy.

  In the sixth aspect, even if a plurality of buoys are provided, reliable communication can be performed by associating each buoy with an underwater responder.

  According to a seventh aspect of the present invention, in any one of the first to sixth aspects, the flow state detection of the ocean layer is characterized by grasping the distribution / behavior of carbon dioxide dilution / diffusion based on the flow state of the ocean layer. Is in the way.

  In the seventh aspect, the distribution / behavior of dilution / diffusion of carbon dioxide can be grasped based on the status of the tracer.

  In addition, the method for detecting the flow state of the ocean layer of the present invention makes it possible to grasp the behavior of the released liquid even in the middle layer of the ocean.

  FIG. 1 shows the overall configuration of a flow status detection apparatus that implements a method for detecting the flow status of an ocean layer according to an embodiment of the present invention, FIG. 2 shows a schematic configuration of a data carrier, and FIG. FIG. 4 shows a schematic configuration of the tracer and the carrier for buoy emission, and FIG. 5 shows a concept representing the observation state of the diffusion behavior in the horizontal plane direction.

  Based on FIG. 1, the whole structure of a flow condition detection apparatus is demonstrated.

  As shown in the figure, the ship 1 navigating offshore knows the current position on the earth by GPS 2 and displays various information on the CPU 3 for command and display. In addition, an offshore towed body 4 towed offshore is connected to the ship 1, and the offshore towed body 4 is provided with a control device 5 and an azimuth / tilting device 6. Is grasped by GPS2. The ship 1 and the offshore towed body 4 can wirelessly communicate via the wireless means 7.

  The offshore towed body 4 has air stored therein to maintain buoyancy, and a pole 8 that functions as a keel is provided under the sea surface. A transmitter / receiver 9 is provided at the tip of the pole 8 as a receiving means for data transmission and position detection, and various data signals received by the transmitter / receiver 9 are sent to the CPU 3 of the ship 1 via the wireless means 7. .

  On the other hand, the wire 11 is lowered into the sea from the rear of the ship 1 and the wire 11 is towed at the tip of the wire 11 while maintaining a predetermined range of depth (for example, maximum 3000 m) over the length direction. A weight 10 is attached. The offshore towed body 4 is towed at sea by the ship 1 and the wire 11 is towed through the sea in a range of a predetermined depth.

  Five data carriers 12 (underwater responders) are attached to the wire 11, and the five data carriers 12 are, for example, maintained in the middle layer (for example, 1000 m to 3000 m) in the sea. Although details will be described later, the data carrier 12 is provided with a transmitting means for transmitting a data signal by acoustic communication, a field measuring instrument, a sampling means, a data storage means, and the like.

  Note that the number of data carriers 12 is not limited to five, but two to four or a plurality of six or more may be provided.

  On the other hand, as shown in FIG. 3, a fluorescent dye and a buoy as a tracer are released from a carrier 13 towed by a ship 101 sailing on the ocean. That is, the wire 11 is lowered into the sea from the rear part of the ship 101, and the wire 11 is towed at the tip of the wire 11 while maintaining a predetermined range of depth (for example, maximum 3000 m) over the length direction. A weight 10 is attached. The wire 11 is towed in the sea within a predetermined depth range by the ship 101.

  A carrier 13 is attached to the wire 11, and the carrier 13 is maintained, for example, in the middle layer in the sea (for example, 1000 m to 3000 m). As will be described in detail later, the carrier 13 is provided with means for releasing a fluorescent dye as a tracer and means for releasing a buoy.

  When the ship 101 is sailed, the fluorescent dye and the buoy 102 are released into the ocean layer at a predetermined depth, and the diffusion state of the emitted fluorescent dye is predicted with the distribution / behavior of the diffusion of the fluorescent dye predicted by the behavior of the buoy 102. Collect data. That is, based on the behavior of the buoy 102, the movement of the ship 1 towing the data carrier 12 is adjusted to set a course that can efficiently detect the fluorescent dye. The buoy 102 is provided with a buoyancy adjustment function (density adjustment function) so that buoyancy is maintained in the ocean layer having a set density. For example, a plurality of buoys 102 are provided and can be adjusted to different densities. Thereby, the flow of a several layer can be estimated in a depth direction. In this case, since five data carriers 12 are provided, by using five buoys 102 corresponding to the data carriers 12, each buoy 102 is associated with an underwater responder to perform reliable communication. Can do.

  The collected data is sent from the data carrier 12 to the transducer 9 of the offshore towed vehicle 4 by acoustic communication, and the data sent to the transducer 9 is sent to the CPU 3 of the ship 1 via the wireless means 7. The CPU 3 derives a predetermined ocean layer flow situation based on the transmitted data. By observing and grasping the diffusion state of the fluorescent dye, for example, it is possible to infer the spread state of carbon dioxide in the sea, the dilution state, the influence on living organisms, the effectiveness of dilution, and the like.

  When the wire 11 is towed by the ship 1, vibration occurs in the sea, but the transmission means of the data carrier 12 is suspended by a rope or the like to be acoustically separated, and acoustic noise is reduced. The five data carriers 12 simultaneously communicate with the offshore towed vehicle 4 to transmit and receive data, and the time lag of acoustic communication caused by transmission and reception between the offshore towed vehicle 4 and the five data carriers 12 is eliminated, thereby shortening the measurement interval. It is possible.

  The configuration of the data carrier 12 will be described with reference to FIG.

  As shown in the figure, a frame-like gantry 15 is attached to the wire 11, and a transmission means 17 is supported on the gantry 15 via a rope 16. The transmission means 17 is provided with a depth meter (not shown). The transmission means 17 transmits data to the ship 1 (see FIG. 1) via the offshore towed body 4 (see FIG. 1) and the offshore towed body 4 (see FIG. 1). The command is received from the ship 1 (see FIG. 1) via (see FIG. 1). The transmission means 17 can also communicate with the released buoy 102 (see FIG. 1).

  A fluorometer 19 is provided as an on-site measuring instrument at the top of the pedestal 15, and the state of the fluorescent dye when a fluorescent dye described later is released is detected by the fluorometer 19. In addition, a water sampler 26 for collecting seawater by remotely opening and closing the valve, a storage means 27 for storing data measured by the field measuring instrument, a battery 28 as a power source for various devices, and a pH sensor 23 are provided. .

  The configuration of the carrier 13 will be described with reference to FIG.

  As shown in the figure, a cylindrical frame-like cylindrical mount 21 is attached to the wire 11 and a transmission means 17 is provided. Further, a fluorescent dye releasing device 25 is attached. The fluorescent dye releasing device 25 includes a cylinder 25a filled with the fluorescent dye, and includes a pump 25b that drives the piston to discharge the fluorescent dye by feeding seawater into the cylinder 25a. The fluorescent dye filled in the cylinder 25a is selected to have a density that matches the density of the released ocean layer. A plurality of (three shown in the figure) buoys 102 are held on the carrier 13 and supported so as to be releasable at a desired position. Each buoy 102 is provided with a pH sensor and communication means, and each buoy 102 is provided with a buoyancy adjustment function.

  By sending a control command from the ship 101 (see FIG. 3) at an arbitrary time, the driving of the pump 25b of the fluorescent dye releasing device 25 and the discharging of the buoy 102 are controlled.

  The operation of the flow state detection apparatus having the above configuration will be described.

  In the present embodiment, the fluorescent dye is released from the ship 101 to a predetermined ocean middle layer (for example, a water depth of 1000 m) under predetermined conditions, and a plurality of buoys 102 are released, and the diffusion of the fluorescent dye is performed based on the behavior of the buoys 102. By predicting the distribution and behavior of fluorescent dye diffusion by acoustic communication with the data carrier 12 towed by the ship 1 while predicting, it is possible to grasp the flow in the predetermined ocean middle layer and to dilute and diffuse carbon dioxide. The distribution / behavior is derived. Based on the derived distribution / behavior, the condition of ocean dilution of carbon dioxide will be evaluated, and specific data for setting conditions for application to actual emission technology will be used. For example, it is set as data for optimally setting the discharge pressure, the shape of the discharge nozzle, and the like according to the density of the ocean middle layer and the flow situation.

  As shown in FIGS. 3 and 5, the ship 101 is navigated, and the wire 11 in a state where the carrier 13 is maintained in a predetermined middle ocean layer by the weight 10 is towed. The pump 25b of the fluorescent dye releasing device 25 is driven at a predetermined location to release the fluorescent dye, and at the same time, the buoy 102 is released.

  Further, as shown in FIGS. 1 and 5, the vessel 1 tows the offshore towed body 4 and tows the wire 11 in a state where the data carrier 12 is maintained in a predetermined ocean middle layer by the weight 10. The positional relationship among the ship 1, offshore towed body 4, and data carrier 12 is always grasped by the GPS 2.

  The navigation route of the ship 1 is controlled while predicting the diffusion of the fluorescent dye based on the behavior of the buoy 102, and the fluorescent dye is traced by operating various devices in conjunction with the information on the field measuring instrument of the data carrier 12. That is, the emitted fluorescent dye is traced while monitoring the state of the fluorescent dye by the fluorometer 19, and the distribution / behavior of diffusion is detected. Further, depending on the type of tracer to be released, the pH sensor 23 is used to detect the distribution / behavior of diffusion. Further, the seawater is collected by the water sampler 26 that collects seawater by opening and closing the valve by remote operation, or the data is stored by the storage means 27 that stores the data measured by the field measuring instrument. By collecting desired seawater with the water sampler 26, it is possible to carry out an investigation of ecosystems such as living organisms, and it is also possible to use it as an indicator of carbon dioxide dilution / diffusion.

  Information on the luminous intensity of the fluorescent dye and information such as a depth meter are transmitted from the transmission means 17 to the CPU 3 by the wireless means 7 via the transducer 9 of the offshore towed body 4. The CPU 3 grasps the distribution and behavior of the diffusion of the fluorescent dye, and derives the distribution and behavior of the dilution / diffusion of carbon dioxide based on the distribution and behavior of the diffusion of the fluorescent dye.

  The fluorescent dye released to the middle ocean layer diffuses in the flow direction with a width in the horizontal direction according to the density distribution and flow distribution. For this reason, the course of the ship 1 is adjusted while predicting the diffusion behavior of the fluorescent dye based on the behavior of the buoy 102, and the ship 1 is navigated in the direction of flow of the fluorescent dye and in the direction crossing the flow direction. That is, diffusion is predicted by a plurality of buoys 102 each maintaining buoyancy at a predetermined depth in the depth direction, and in the width direction, the ship 1 is navigated in a zigzag state with respect to the flow. The diffusion state of the fluorescent dye at the depth is detected (see FIG. 5).

  That is, as shown in FIGS. 3 and 5, the emitted fluorescent dye 31 becomes a band having a predetermined width within a predetermined density range (see FIG. 3) and a predetermined width due to the flow of the ocean layer. (See FIG. 5) Diffusion. For example, from the upstream side (left side in FIG. 5) of the flow of the fluorescent dye 31 to the downstream side (right side in FIG. 5), the ship 1 reciprocates in the direction intersecting the strip-shaped fluorescent dye 31 (up and down direction in FIG. 5). Then, the diffusion state of the fluorescent dye 31 is detected.

  For this reason, it is possible to predict the diffusion state of the fluorescent dye 31 by the behavior of the buoy 102 and adjust the course of the ship 1, and to grasp the spread of the plane of the fluorescent dye 31 and the spread in the depth direction. Even if it exists, the behavior of the emitted fluorescent dye 31 can be accurately grasped, and it becomes possible to accurately derive the dilution / diffusion behavior of carbon dioxide in the middle layer of the ocean.

  In the above-described embodiment, an example in which a fluorescent dye is used as a tracer has been described. However, it is possible to use other liquids as long as they are fluids that do not adversely affect the environment.

  Therefore, it is possible to grasp the behavior of the emitted fluorescent dye 31 even in the middle layer of the ocean, and it can be applied to, for example, the technology of carbon dioxide ocean isolation.

  INDUSTRIAL APPLICABILITY The present invention can be used, for example, in the industrial field of a method for detecting the flow state of a marine layer for grasping the behavior of liquid released into the middle ocean layer.

BRIEF DESCRIPTION OF THE DRAWINGS It is a whole block diagram of the flow condition detection apparatus which implements the flow condition detection method of the oceanic layer which concerns on the example of 1 embodiment of this invention. It is a schematic block diagram of a data carrier. It is a whole block diagram of the condition which is releasing the tracer. It is a schematic block diagram of the tracer and the carrier for buoy discharge | release. It is a conceptual diagram showing the observation condition of a diffusion behavior in a horizontal plane direction.

Explanation of symbols

1,101 Ship 2 GPS
3 CPU
DESCRIPTION OF SYMBOLS 4 Offshore towed object 5 Control apparatus 6 Direction / tilting apparatus 7 Radio | wireless means 8 Pole 9 Transmitter / receiver 10 Weight 11 Wire 12 Data carrier 13 Carrier 15 Mount 16 Rope 17 Transmitting means 19 Fluorophotometer 21 Cylindrical mount 23 pH sensor 24 Depth meter 25 Fluorescent dye releasing device 26 Water sampler 27 Accumulating means 28 Battery

Claims (7)

Releases a tracer to the ocean layer at a predetermined depth and releases a buoy that maintains a predetermined depth, and intersects the flow state of the tracer and the flow direction of the tracer while predicting the diffusion of the tracer based on the behavior of the buoy A method for detecting a flow state of an ocean layer, comprising: detecting a flow state of the ocean layer at a predetermined depth based on a flow state in a flowing direction. In claim 1,
A tracer is a fluorescent dye, and a method for detecting a flow state of an ocean layer, wherein the flow state of the ocean layer is derived based on the distribution and behavior of the diffusion of the fluorescent dye. In claim 1 or 2,
A method for detecting a flow state of an ocean layer, wherein a plurality of buoys are applied and different depths are maintained. In any one of Claims 1-3,
Collecting data with an underwater transponder towed from a ship navigating offshore with the current position on the earth known, and transmitting the collected data. A method for detecting a flow state of an ocean layer, characterized by deriving a flow state. In claim 4,
A method for detecting the flow condition of an ocean layer, characterized in that communication by an underwater responder is acoustic communication. 6. A method for detecting a flow state of an ocean layer according to claim 4, wherein the underwater responder corresponds to the buoy depth. In any one of Claims 1-6,
A method for detecting the flow state of an ocean layer, characterized by grasping the distribution and behavior of carbon dioxide dilution / diffusion according to the flow state of the ocean layer.

Images