Plain river network water volume replacement rate calculation method based on remote sensing image, and terminal
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A technology of plain river network and remote sensing image
Pending Publication Date: 2021-11-19
SICHUANG TECH CO LTD
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[0006] The above-mentioned remote sensing estimation method is difficult to measure the river runoff, especially in the plain river network, it is difficult to have enough measurement stations, and the data of the flow station is used for relationship analysis, and it can only solve the control area of the stat
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[0090] Please refer to figure 1 , the first embodiment of the present invention is:
[0091] A method for calculating the water displacement rate of a plain river network based on remote sensing images, comprising:
[0092] Step S1, establishing a water surface area-water level fitting relationship between the water surface area of the water system in the enclosed area of the plain river network and the water level of the water system through remote sensing images;
[0093] Wherein, step S1 specifically includes the following:
[0094] Step S11, obtaining the water surface area of the water system in the plain river network enclosure at each moment through the remote sensing image;
[0095] In this embodiment, geometric correction, orthorectification, radiometric calibration, atmospheric correction, information enhancement, and image classification can be performed on images obtained by high-resolution optical remote sensing satellites to extract water body boundaries....
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[0159] Please refer to figure 2 , the second embodiment of the present invention is:
[0160] A terminal 1 for calculating the replacement rate of plain river network water volume based on remote sensing images, comprising a memory 3, a processor 2, and a computer program stored in the memory 3 and running on the processor 2, and the processor 2 implements the above when executing the computer program. Steps of Example 1.
[0161] To sum up, the present invention provides a method and terminal for calculating the water volume replacement rate of a plain river network based on remote sensing images. Through remote sensing images, the weighted average of the water level data of all the water level stations in the water system of the plain river network enclosure is taken as the weighted average value of each water level station. The water level of the water system in the surrounding area at one time, so as to establish the water surface area-water level fitting relationship be...
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Abstract
The invention discloses a plain river network water volume replacement rate calculation method based on a remote sensing image, and a terminal. The method comprises the following steps: establishing a water surface area-water level fitting relation between the water surface area of a plain river network enclosure water system and the water level of the water system through the remote sensing image; calculating a first water volume from the lowest water level of the plain river network enclosure water system to the water level of each water system by a difference method, calculating a second water volume below the lowest water level by a volume generalization formula method, and adding the first water volume and the second water volume to obtain the total water volume of the enclosure water system corresponding to each water level of the water system; establishing a water level-water volume fitting relation and a water surface area-water volume fitting relation of the plain river network enclosing area water system; and then obtaining the total water volume of the current enclosed area water system at the current moment according to the fitting relationship, so as to calculate the water volume replacement rate. According to the method, the water volume replacement rate can be obtained in real time, the precision of the method meets the calculation requirement of river network water system water volume mass exchange, the surrounding area water volume scheduling condition can be mastered in time, and the method has high practicability.
Description
technical field [0001] The invention relates to the technical field of water ecological environment management, in particular to a method and a terminal for calculating the water displacement rate of plain river networks based on remote sensing images. Background technique [0002] Water replacement is the process of introducing new water to replace old water. It is an important method to improve the water environment of the river network. The water replacement rate is the proportion of new water to the total water. Its size reflects the degree of water replacement and is an important indicator for evaluating the effect of water quality improvement. index. [0003] The calculation methods of the water exchange rate are mainly the water quality model simulation method and the remote sensing method of estimating the river water volume. Among them, the water quality model, also known as the water quality mathematical model, is a mathematical description of the water quality ch...
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