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|1. (WO2018107920) METHOD FOR DETECTING BLOCKAGE IN SUBSURFACE FLOW CONSTRUCTED WETLAND|
|Title:||METHOD FOR DETECTING BLOCKAGE IN SUBSURFACE FLOW CONSTRUCTED WETLAND|
A method for detecting a blockage in a subsurface flow constructed wetland is provided, mainly applied to detecting a blockage in a subsurface flow constructed wetland. Sediments contained in a blocked subsurface flow wetland area (1-2) enhance the water holding capacity of the area, and after water is drained by means of a subsurface flow wetland, moisture content of a wetland bed increases as the degree of blockage increases, such that the apparent resistivity of the wetland bed decreases as the degree of blockage increases. The Wenner method for resistivity measurement is used to measure and calculate the apparent resistivity of a measured area, and according to the apparent resistivity, the blocked area (1-2) is located and the degree of blockage is determined. By means of the detection method, the blocked area (1-2) can be accurately located, and the relative degree of blockage of the blocked area (1-2) can be determined, thereby technically supporting sustainable operation of a subsurface flow constructed wetland. The detection method is high in accuracy, low in damage, easy to operate, and low in implementation costs.