Extraction method for offshore industrial warm discharge water based on aerial remote sensing

A technology for industrial warm water drainage and extraction methods, which is used in surveying, mapping and navigation, open-air water source surveys, measuring devices, etc.

Active Publication Date: 2016-01-13
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

Previous studies on temperature and drainage monitoring mostly used medium- and low-resolution remote sensing images of tens of meters, hundreds of meters, and kilometers, but few studies used thermal infrared remote sensing images with high spatial resolution to monitor temperature and drainage.

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  • Extraction method for offshore industrial warm discharge water based on aerial remote sensing
  • Extraction method for offshore industrial warm discharge water based on aerial remote sensing
  • Extraction method for offshore industrial warm discharge water based on aerial remote sensing

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Embodiment Construction

[0021] The embodiments of the present invention are described in further detail below, but the embodiments are not limited to the present invention, and all similar methods and similar changes of the present invention should be included in the protection scope of the present invention.

[0022] (1) From 10:03 to 10:08 on July 10, 2014, the thermal infrared image of the sea area around a nuclear power plant was obtained with the American ABS sensor, and the radiometric calibration and geometric correction were performed on the image. Use MODTRAN5.3 to calculate t(λ) and L in formula (1) ↓ (λ) and L ↑ (λ), the albedo of seawater is taken as 0.984, and the sea surface temperature is retrieved according to formula (1) and the image after radiometric calibration and geometric correction, see figure 1 ;

[0023] (2) Compared with the temperature measured simultaneously on the ground, the error of the retrieved sea surface temperature is 0.43°C, see figure 2 . The error is less ...

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Abstract

The invention discloses an extraction method for offshore industrial warm discharge water based on aerial remote sensing. The method comprises the following concrete steps: 1) calculating atmospheric parameters by utilizing MODTRAN5.3 software, inputting the atmospheric parameters to a simplified form of an atmospheric radiative transfer equation and subjecting aerial thermal infrared remote sensing data to sea-surface temperature inversion to transform a radiation brightness temperature of a pixel into a temperature; 2) comparing the sea-surface temperature obtained by inversion in the step 1) with a synchronously-measured ground temperature, calculating an error of temperature inversion results, and correcting the results by utilizing the synchronously-measured ground temperature if the error is greater than 0.5 K; 3) extracting a temperature-rising area by using an image segmentation technology; and 4) simulating a sea-surface natural temperature in the temperature-rising area based on a sea-surface temperature in a non-temperature-rising area, subtracting the simulated sea-surface natural temperature in the temperature-rising area with the sea-surface temperature in the same area so as to obtain the temperature-rising value of the temperature-rising area. The extraction method provided by the invention has the following advantages: inversion accuracy is high; and the needs of the offshore industrial warm discharge water for temporal resolution and spatial resolution are met.

Description

technical field [0001] The invention belongs to the field of environmental monitoring, and relates to a method of retrieving sea surface temperature by using aviation thermal infrared remote sensing data, and automatically extracting the temperature rise area and temperature rise value of the temperature and drainage reflecting the range and degree of influence of the temperature and drainage to obtain the distribution map of the temperature and drainage. Background technique [0002] The ocean is located at the bottom of the Earth's biosphere, and most of the waste from human and natural activities is discharged into the ocean. In recent years, the rapid economic development of my country's coastal areas, the gradual acceleration of urbanization, the development of offshore oil, and the operation of offshore power stations have led to a large amount of industrial "three wastes" discharge, resulting in a decline in the environmental quality of coastal areas year by year, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C13/00
CPCG01C13/00
Inventor 邵红兰刘成玉谢锋王建宇舒嵘
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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