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Lake water storage variation monitoring method based on remote sensing

A technology of changing quantity and water level, which is applied in measuring devices, water resources assessment, engine lubrication, etc., can solve the problem of limited on-orbit time of satellite radar water level data, the inability to maximize the length of lake water change time, and the inability to expand water change length of time etc.

Pending Publication Date: 2020-08-07
NANJING HYDRAULIC RES INST
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Problems solved by technology

Previous methods for monitoring changes in lake water storage required the combination of multi-source radar satellite water level data. However, the satellite radar water level data has a limited on-orbit time and cannot extend the length of time for water volume change research; some use a single optical satellite data, which cannot Maximize the length of time the lake's water volume changes

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  • Lake water storage variation monitoring method based on remote sensing
  • Lake water storage variation monitoring method based on remote sensing
  • Lake water storage variation monitoring method based on remote sensing

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Embodiment

[0033] This embodiment provides a method for monitoring lake water storage changes based on remote sensing, including the following steps:

[0034] (1) Remote sensing data collection and analysis

[0035] Organize and obtain remote sensing image data, including long-term series of Landsat optical satellite data, American Keyhole (Keyhole) series satellites, and Sentinel-3 (Sentinel-3A / 3B) data of emerging satellite radar altimetry data in recent years. Combining the color performance of the two optical images of the lake to determine the non-freezing period of the lake, and filter and organize the images. Screening and sorting out the satellite altimetry data during the non-freezing period of the lake.

[0036] (2) Extraction of lake water body information based on object-oriented method

[0037] According to the two kinds of optical images, the image preprocessing is carried out, and then the lake water body is extracted by using the normalized water index method and the ob...

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Abstract

The invention discloses a lake water storage variation monitoring method based on remote sensing. The lake water storage variation monitoring method comprises the following steps: collecting and analyzing remote sensing data; extracting lake water body information based on an object-oriented method; extracting lake water level based on synthetic aperture radar height measurement data; establishinga relation model based on remote sensing lake area change-water level change; and estimating and researching the water quantity change of the lake in a long-time sequence. According to the lake waterstorage variation monitoring method based on remote sensing, multi-source water level data is not relied on, based on a long-time sequence lake area extracted from two kinds of optical remote sensingdata of Landsat and Keyhole satellites, based on single satellite radar altimetry data (Sentinel-3) in a limited time period, the water storage change of the lake in the past fifty years is estimated, and a new thought is provided for monitoring the long-time-sequence water volume change of the lake.

Description

technical field [0001] The invention relates to the technical field of monitoring lake water storage changes, in particular to a method for monitoring lake water storage changes based on remote sensing. Background technique [0002] Climate change is currently a major international scientific issue, and water resources are one of the most direct and important areas affected by climate change. Climate affects the distribution and change of water resources by affecting a series of important links in the water cycle such as precipitation, evaporation, and runoff. Lakes are an important carrier of surface water resources. In recent decades, the climate has generally trended towards warming and humidification and warming and drying. The shape and water volume of lakes have undergone tremendous changes. [0003] Satellite remote sensing technology provides technical means for monitoring changes in lake water volume. In the existing technology, lake area and water level are essen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F23/284G01S13/90
CPCG01F23/284G01S13/90G01S13/9027Y02A90/30
Inventor 黄对刘九夫王文种刘宏伟彭安帮马涛许钦王欢张蓉孙意翔郑皓
Owner NANJING HYDRAULIC RES INST
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