Telemetering method for quick tidal wetland terrain measurement

Abstract

The invention discloses a telemetering method for quick tidal wetland terrain measurement. The telemetering method comprises the steps of building more than two water level telemetering stations in a measured tidal wetland and relevant water domains, constructing a water level observation base line and a water level telemetering station network along the longitudinal direction of the measured water domain so as to perform real-time water level monitoring, and constructing observation water level lines at different time synchronous with an acquired telemetering image; acquiring multi-source and multi-temporal satellite telemetering image data of the monitored region, and extracting telemetering flowage lines at different water levels; performing synchronous water level assignment on each flowage line point on each telemetering flowage line, and constructing three-dimensional telemetering flowage lines; and constructing a tidal flat digital terrain model on the basis of a series of the three-dimensional telemetering flowage lines to finally finish the tidal wetland terrain map of a monitored region. According to the tidal terrain innovation method on the basis of satellite telemetering and a hydrologic network, the difficulty in conventional manual measurement on foot, shipborne radar field measurement and modern aerial radar measurement is overcome; the height accuracy of terrain measurement reaches the centimeter level.

Description

technical field [0001] The invention relates to a topographic measurement method, in particular to a remote sensing and telemetry method for rapid topographic measurement of tidal flats and wetlands. Background technique [0002] The traditional topographic survey method based on theodolite and modern total station belongs to the field survey method, and its technical route for regional topographic survey is a topographic survey method from point to line and then to surface. The field measurement operation conditions are difficult, the efficiency is low, and the financial resources are consumed. [0003] Underwater topographic survey is mainly carried out by ship-borne test instrument. Tidal flats are widely distributed in the coastal areas of rivers, lakes, and tidal flat topography is a long-standing problem. The ship-borne measurement method of underwater topography is limited by the need for sufficient water depth (draft) for ships to sail, and the measurement ship can...

AI Technical Summary

Problems solved by technology

Predecessors often use hydrodynamic models or measured cross-section data to assign water edge elevations. For large areas of tidal flat areas that lack underwater terrain data, the accuracy of hydrodynamic model simulation is not high, while artificially measured cross-sections often It cannot meet the needs of large-scale assignment, so the terrain errors obtained by these two assignment methods are relatively large

In addition, this kind of water edge method does not integrate a synchronous water level observation system, and the inverted topographic data can be used for tidal flat evolution analysis, but it is not enough to develop into an operable tidal flat topographic monitoring method system

Images