Device and method for evaluating offshore sea level rise based on river runoff

A technology for evaluating devices and runoff, which is applied to measuring devices, instruments, surveying and mapping, and navigation to achieve the effect of improving accuracy

Active Publication Date: 2020-01-03
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most researchers' studies on the contribution of sea level have focused on ice sheets, ignoring the influence of river runoff on offshore sea level rise

Method used

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  • Device and method for evaluating offshore sea level rise based on river runoff
  • Device and method for evaluating offshore sea level rise based on river runoff
  • Device and method for evaluating offshore sea level rise based on river runoff

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as Figure 1-3 As shown, the device and method for assessing offshore sea level rise based on river runoff includes a buoy 1; the buoy 1 is connected with a sonar 3 and a current meter 4; The nacelle 3 is installed on the buoy 11 through the platform 2 ; the current meter 4 is installed on the buoy 1 through the load-bearing composite cable 5 . The probe of the sonar 3 in the evaluation device of the present invention can be rotated 180 degrees, and is used to measure the shape of the river bed of a river, and obtains the runoff area perpendicular to the flow direction, that is, the runoff cross-sectional area; the flow meter 4 is used to measure the flow velocity and flow direction, and the obtained flow direction is used for checking Sonar 3 detects if the fan is perpendicular to the flow velocity. If it is not vertical, the platform control cabin inside the pan-tilt 2 controls the rotation of the pan-tilt 2, adjusts the probe of the sonar 3 to make the detectio...

Embodiment 2

[0036] The working principle of the assessment device for offshore sea level rise based on river runoff:

[0037]After the evaluation device is placed in the water in the area to be evaluated, the floating plate 11 on the buoy 1 is connected to the cloud platform 2 through the load-bearing composite cable, and the sonar 3 is installed on the cloud platform 2, so the buoy 1 passes through the load-bearing composite cable. Retract and adjust the underwater depth of the gimbal 2 to ensure that the sonar 3 works at the set depth. Similarly, the buoy 1 can also adjust the underwater depth of the current meter 4 by retracting the force-bearing composite cable 5 to ensure that the current meter 4 works at a set depth. Then use the sonar 3 in the evaluation device to measure the shape of the river bed, obtain the runoff area, calculate the runoff amount according to the runoff area and flow velocity, and determine the value of each sea level rise. Among them, the flow meter 4 in the ...

Embodiment 3

[0039] The assessment method of offshore sea level rise based on river runoff includes the following steps:

[0040] S1: First obtain the area to be evaluated;

[0041] S2: placing the evaluation device of Example 1 in the area to be evaluated;

[0042] S3: Use the sonar 3 in the evaluation device to measure the shape of the river bed, obtain the runoff area, obtain the runoff amount according to the runoff area and flow velocity, and determine the value of each sea level rise. Among them, the flow meter 4 in the evaluation device is used to measure the flow velocity and flow direction, and the obtained flow direction is used to check whether the sonar 3 detection fan is perpendicular to the flow velocity; Flow: When the detection fan is not perpendicular to the flow velocity, the platform control cabin inside the platform 2 rotates the pan-tilt 2, and then drives the rotation of the sonar 3, so that the detection fan of the sonar 3 is perpendicular to the flow velocity, and ...

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Abstract

The invention provides a device and a method for evaluating an offshore sea level rise based on river runoff, and belongs to the field of sea level evaluation. The evaluation device comprises a buoy (1); the buoy (1) is connected with a sonar (3) and a pitometer (4), wherein floating plates (11) are fixedly connected to both sides of the buoy (1), and the sonar (3) is installed on the floating plates (11) through a pan-tilt (2); and the pitometer (4) is installed on the buoy (1) through a load-bearing composite cable (5). The above evaluation method performs the evaluation by using the above evaluation device. The evaluation device provided by the invention can adjust the sonar according to the flow direction of the pitometer, so as to ensure that a detection surface of the sonar (3) is perpendicular to the flow velocity, the accuracy of the evaluation device is improved while the scanning times of the sonar (3) are reduced, the runoff area is obtained, and the rise in a probe sea areaat the estuary is predicted in advance.

Description

technical field [0001] The invention belongs to the field of sea level assessment, and in particular relates to an assessment device and method for offshore sea level rise based on river runoff. Background technique [0002] The Yangtze River Estuary is the largest estuary in my country, its runoff is second only to the Amazon River and the Congo River, ranking third in the world, and the tidal current is also strong. Under the interaction of these two powerful forces, the Yangtze River Estuary is regularly branched. The river section of the Yangtze River Estuary has a river pattern of three levels of branches and four mouths entering the sea. There are four passages entering the sea, the North Branch, Beigang, North Channel and South Channel. The 2012 China Sea Level Bulletin shows that the East China Sea from 1980 to 2012 The rate of sea level rise is 2.0~3.0mm.a -1 , and according to the 2013 IPCC (Intergovernmental Panel on Climate Change) Climate Change Assessment Report...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C13/00
CPCG01C13/00
Inventor 陈维毛晨浩李忠明顾一凡曾濠
Owner ZHEJIANG OCEAN UNIV
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