Full
Outline
Based on ground-based single-antenna GNSS receivers, the global navigation satellite system-interferometric reflectometry(GNSS-IR) technique can utilize the signal-to-noise ratio(SNR) to invert the vertical distance between the reflective surface and the antenna, thereby estimating water level heights. To reduce equipment costs and enhance the accessibility of GNSS-IR technology, while fully leveraging existing deformation monitoring GNSS stations, this study proposes the use of universal BDS/GNSS receivers for monitoring the structural deformation of large bridges. By integrating quality control, error correction models, and result fusion methods, effective monitoring of water level changes beneath bridges is achieved. Processing data from two universal BDS/GNSS receivers installed on the main cable of the Guojiatuo Changjiang bridge in Chongqing, which are used for monitoring bridge structural deformation, the study results indicate that the GNSS-IR water level time series, after quality control, error correction, and fusion processing, are highly consistent with the data trends from traditional hydrological stations, with a correlation coefficient reaching 0.99. This outcome not only validates the feasibility of this method in monitoring water level changes beneath large bridges but also demonstrates the broad application prospects of universal BDS/GNSS receivers in river water level monitoring, providing robust data support for flood early warning and water resource assessment.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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