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Lake and reservoir time sequence water level reconstruction method of lakeside zone virtual station

A technology of virtual stations and lakeside zones, applied in the fields of hydroinformatics and remote sensing science, which can solve the problems of inability to obtain continuous and complete information on lake water level changes, limited service life, and limited coverage of altimetry satellites

Active Publication Date: 2020-05-22
NANJING INST OF GEOGRAPHY & LIMNOLOGY
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Problems solved by technology

[0006] In summary, the existing lake water level data acquisition is often time-consuming and labor-intensive due to manual observation, limited coverage of altimetry satellites, and limited service life. Obtain continuous complete information on water level changes for many lakes

Method used

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  • Lake and reservoir time sequence water level reconstruction method of lakeside zone virtual station
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  • Lake and reservoir time sequence water level reconstruction method of lakeside zone virtual station

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Embodiment 1

[0049] Embodiment 1 of the present application takes Sering Co, the largest lake in the Tibet Autonomous Region, as the research object. The Qinghai-Tibet Plateau is known as the "Roof of the World" and the "Water Tower of Asia". This area has complex terrain, unique climate, and widespread distribution of lakes and glaciers. It is the core area for current research on the impact of global change. Selin Co is located in the hinterland of the Qiangtang Plateau, and there are three main rivers that provide perennial runoff, namely, Zhajia Zangbu that flows in from Sanba Erdaoban on the north bank, Boqu Zangbu that flows in from Gariqiu on the east bank, and Boqu Zangbu that flows in from Zangbu is rooted in Yagula on the West Bank. As the largest lake in Tibet and the second largest lake in the Qinghai-Tibet Plateau, many rivers and lakes in the Selin Co water catchment area are connected to each other, forming a closed inland lake group, which leads to a strong response to clim...

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Abstract

The invention discloses a lake and reservoir time sequence water level reconstruction method of a lakeside zone virtual station. A water area range of a multi-stage Landsat image is extracted by meansof a normalized difference water body index (NDWI) histogram adaptive threshold segmentation method; and then the lake water level of the image observation time is obtained by combining digital elevation model data and adopting a lake shoreline elevation automatic extraction method, and the high-precision lake water level can be obtained for cross validation based on lakeside zone high-resolutionimages and unmanned aerial vehicle aerial survey digital terrain products. According to the method, the conditions that an existing radar / laser altimetry satellite covers few lakes and is limited inservice life are made up and supplemented by obtaining a larger number of lake water level change information with a longer time sequence, and method support is provided for lake change analysis lacking station observation in remote areas and research of multi-year continuous space-time evolution rules of the lakes.

Description

technical field [0001] The present invention relates to the fields of hydroinformatics and remote sensing science and technology, especially embodying the integration of star-space-ground (multi-temporal remote sensing satellite imagery, unmanned aerial vehicle aerial survey stereoscopic relative, LiDAR data products and digital elevation model) observation integration of virtual station observation in the lakeside zone A method for historical long-term water level reconstruction. Background technique [0002] Lakes play the role of maintaining, purifying and storing surface water, and are an important part of the water cycle (Lehner et al., 2004). Their formation and evolution are not only affected by natural environmental factors and changes in the basin, but also deeply disturbed by human activities ( Yang Guishan et al., 2010), changes in lake waters reflect regional water balance, biogeochemical cycles, exchange of energy and trace gases with the atmosphere and human W...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/136G06K9/00
CPCG06T7/136G06T2207/10032G06V20/13G06V20/41Y02A90/30
Inventor 宋春桥詹鹏飞
Owner NANJING INST OF GEOGRAPHY & LIMNOLOGY
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