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Valley salt tide prediction method

A prediction method and technology of salt tide, which can be used in measurement devices, surveying and navigation, open-air water source survey, etc., and can solve problems such as the occurrence and degree prediction of salt tide.

Inactive Publication Date: 2012-02-22
SOUTH CHINA SEA INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The invention provides a method for predicting salty tides in a river basin to solve the technical problem that the prior art cannot predict the occurrence and degree of salty tides

Method used

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Embodiment Construction

[0029] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] In this embodiment, the area of ​​the mouth of the Pearl River Estuary in Guangdong Province is used as the measurement watershed.

[0031] The first step is to forecast the runoff at each estuary of the Pearl River Estuary. Internationally, based on the fact that the topographic surface flow is along the direction of the steepest descent, a digital elevation model (DEM) is proposed, which can obtain a more realistic watershed runoff, so that the runoff can be measured in a more realistic, physical manner. A credible way to drive ocean circulation. The hydrological digital elevation model (H-DEM) used in this project is selected as follows figure 1 Shown is 95.00°E-120.05°E, 20.00°N-28.04°N with a latitudinal resolution of 0.05° and a meridional resolution of 0.03°. The area covers the entire Pearl River Basin. The maximum ...

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Abstract

The invention relates to the field of oceanic disaster monitoring and prewarning, in particular to a valley salt tide prediction method, which comprises the following concrete steps: (11) predicting the radial flow of the valley to be measured to obtain the average daily flow rate, the average monthly flow rate and the average annual flow rate of the radial flow; and (12) using the average daily flow rate, the average monthly flow rate and the average annual flow rate of the radial flow obtained in the step (11) as parameters to be introduced into a three-dimensional water motive power mode for simulating the dynamic state of the salt tide. Through predicting the radial flow of the valley in advance and using the flow rate of the radial flow as the input parameters of the three-dimensional water motive power mode for predicting the dynamic state of the salt tide, the invention solves the technical problem of predicting the occurrence and the degree of the salt tide.

Description

technical field [0001] The invention relates to the field of marine disaster monitoring and early warning, in particular to a method for predicting salty tides in a river basin. Background technique [0002] Salt tide is one of the most complex phenomena in the delta, especially in the Pearl River Delta. It is driven, affected and restricted by many factors such as runoff, tide and topography, and shows extremely complex temporal and spatial changes. In the past ten years, the salt tides in the Pearl River Delta have occurred frequently in winter and spring, which has affected local production and domestic water use, and had a great impact on the development of the national economy. Guangdong Province is located in the lower reaches of the Pearl River Basin. The amount of precipitation in the province directly affects the runoff of the Pearl River, and the change in the runoff of the Pearl River Basin is one of the main reasons for the occurrence of salt tides in the Pearl R...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C13/00
CPCY02A90/30
Inventor 罗琳
Owner SOUTH CHINA SEA INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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