Soil Salinization Automatic Monitoring And Early Warning Platform Research And Development Based On Electrical Resistivity Probe Technique

Soil salinization is a common geological disaster, soil salinity conditions andsalinization degree of spatial distribution characteristics is a prerequisite for effectivegovernance. Electrical conductivity method as a fast and stable determination methodof soil salt temporal and spatial distribution characteristics has been widely applied inthe study of soil salinization.In this paper an remote in-situ automatic monitoringsystem is developed and used to monitor the water and salt movement,which isfunded by the project of "Storm in the National High Technology Research andDevelopment Program (863Program) process of sediment resuspension flux in situmonitoring techniques (No.2008AA09Z109)”,for the purpose of development ofin-situ real-time automatic monitoring system on the transportation of saline soilwater and salt and investigation of the forming mechanism and management of salinesoils.The paper begins with the introduction of saline soil monitoring technology.Based on the advantages and disadvantages of previous technology, the water andsalt transport real-time automatic monitoring system is hereby introduced, and anoptimization design makes the system more applicable to the monitoring of thecoastal saline soil water and salt transport processes. Through a series of laboratoryand field tests, the method on determining the characteristics of saline soil water andsalt transport process and the migration rate is found, and the overall work of thesystem’s effect is inspected, establishing the foundation for the next verification ofsystem optimization and analysis of the saline soil water and salt transport process.First, the paper introduces both a variety of saline soil monitoring technologies athome and abroad and the theoretical background of saline soil, according to theinadequacies in existing technologies of in-site monitoring, the application of the sets of resistivity monitoring system is now required.Second, on considering the site conditions and resistivity probe features, areal-time automatic system monitoring the soil salinity is well described, we optimizethe design of this system: change the one probe into the plug-in, optimizes the circuitboard, and add the automatic cartography and remote control functions, so that themonitoring system more applicable.Finally, the paper introduces a series of indoor and outdoor tests, through theanalysis of test results, we found that: monitoring data total salt and water content areof good exponential relationship; Through analysis the date of soil resistivity waterand salt transport process is verified and soil salination process is monitored assessedforecasted furthermore,reference reclamation information are provided. Monitoringdata shows that the intensively water and salt transport from blew will lead to theinverted soil salinity. In the process of rainfall, rainwater leaching make saltredistributed in the soil profile. The phenomenon that surface soil desalination andsalt peak move down to the lower area is obvious. Soil profile at0~10cm fordesalination areas,10to35cm for salt peak move down areas.This is the first time to realize the optimization of the resistivity measurementssystem design for remote, automatic monitoring saline soil water and salttransport. Drawn through the indoor and outdoor tests and analysis of test data, thesystem in real time, automatic measurement of the resistivity changes during thesaline soil water and salt transport process and the remote transmission of monitoringdata is verified.which can accurately determine the saline soil water and saltchanges. All in all,this study enriches the saline soil water and salt transportmonitoring technology and provides a viable means of remote,in-situ and automaticmonitoring the evolution saline soil, which have a broad range of applications anddevelopment prospects.