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1. (WO2018107920) METHOD FOR DETECTING BLOCKAGE IN SUBSURFACE FLOW CONSTRUCTED WETLAND

Pub. No.:    WO/2018/107920    International Application No.:    PCT/CN2017/109610
Publication Date: Fri Jun 22 01:59:59 CEST 2018 International Filing Date: Wed Nov 08 00:59:59 CET 2017
IPC: G01N 27/04
G01V 3/06
Applicants: SHANDONG UNIVERSITY
山东大学
Inventors: ZHANG, Jian
张建
LIU, Huaqing
刘华清
HU, Zhen
胡振
ZHANG, Chenglu
张成禄
FAN, Jinlin
范金林
Title: METHOD FOR DETECTING BLOCKAGE IN SUBSURFACE FLOW CONSTRUCTED WETLAND
Abstract:
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.