Seepage detection method for coastal intake and drainage gate facility based on radon isotope

Abstract

The invention provides a seepage detection method for coastal intake and drainage gate facility based on radon isotope, and the method comprises the steps: uniformly dividing measurement point grids according to the shape of a fresh water area nearby the interior of a water gate; collecting water samples, collecting and storing the water samples in all measurement point grids at the same depth, measuring the radon activity of the water samples in real time, drawing the radon activity distribution map of an intake and drainage gate, selecting a radon activity abnormality area grid, carrying out the vertical collection of water samples at the actual coordinates of the radon activity abnormality area grid at intervals at a certain depth, collecting the water samples of external sea water of the water gate and water samples of underground water nearby the intake and drainage gate at the same time for the radon activity comparison, and comprehensively recognizing the three-dimensional coordinates and a seepage path of a seepage point. The technological principle of the method has the complete physical mechanism, and the method is clear and definite in operation path. The method achieves the recognition of the three-dimensional coordinates of the seepage point and the seepage path through the high-resolution grid comprehensive multisource information. The method can achieve the quantitative distinguishing of sea water intrusion quantity and underground seepage quantity at the seepage place, is simple and quick in detection process, and achieves an effect of lossless detection.

Description

technical field [0001] The invention belongs to the field of leakage detection of water conservancy projects, in particular to a method for detecting leakage of coastal intake and drainage sluice facilities based on radon isotopes. Background technique [0002] The reclamation and development of coastal tidal flat land is an important part of comprehensive land improvement. New reclamation areas are often threatened by seawater intrusion, resulting in soil salinization and reduction in the area of ​​farmland in reclamation areas. To prevent seawater intrusion into new reclamation areas, the widespread leakage of intake and drainage facilities must be resolved. At present, there are few studies on the leakage detection of sluices in coastal reclamation areas, and it is difficult to distinguish the amount and path of seawater intrusion and groundwater leakage, which greatly hinders the development of related engineering or non-engineering restoration measures. Traditional met...

AI Technical Summary

Problems solved by technology

Resistivity method and radar geophysical method detect the surface and internal defects of hydraulic structures to determine the location of the leakage, but this detection method generally needs to drain the reservoir water, which requires a huge workload and large detection errors; The pseudo-random flow field method uses the current density field to fit the abnormal flow velocity field distribution caused by piping leakage, the detection depth is limited, and the results are uncertain

Images