River Discharge Derived of Lijiang River Basin Based on Sentinel-1 SAR Data
As a new type of detection method developed based on the theory of electromagneticwaves, remote sensing technology has the advantages of non-contact observation, low measurementcost and wide coverage, which has opened up new ideas for the measurement of river discharge.Based on the Sentinel-1 SAR re...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Pearl River
2020-01-01
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| Series: | Renmin Zhujiang |
| Subjects: | |
| Online Access: | http://www.renminzhujiang.cn/thesisDetails#10.3969/j.issn.1001-9235.2020.05.016 |
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| Summary: | As a new type of detection method developed based on the theory of electromagneticwaves, remote sensing technology has the advantages of non-contact observation, low measurementcost and wide coverage, which has opened up new ideas for the measurement of river discharge.Based on the Sentinel-1 SAR remote sensing image covering the Lijiang River Basin from August 2018to July 2019, the image was obtained every 12 days for a total of 29 groups of 58 scenes. Theartificial threshold segmentation method was used to extract the average river width of the waterbody along the Lijiang River. It is divided into 8 river sections, and the river discharge datafrom three corresponding hydrological stations of Darong River, Guilin and Yangshuo are used forone-dimensional regression analysis to establish the average river width-discharge regressionequation. Comparing the modeling effect of each river section, the best modeling sectioncorresponding to each station is obtained, with R<sup>2</sup> of 0.92, 0.94 and 0.88 respectively. To verifyits empirical formula, the average deviation of river discharge inversion is at least 10%. It hasa good application effect in the river section with wider river channel and slower terrain. It canrealize the river discharge inversion based on remote sensing technology. |
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| ISSN: | 1001-9235 |