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Research, development and processing of computerised measuring system for soil moisture using the eis method

Development and production of a new monitoring system using the electrical impedance spectrometry (eis) method.

The project is based on the research, design and production of the automated system for observing soil moisture changes. To reach this goal of non-electrical quantity progress investigation, indirect non-invasive methods taking advantage of correlations between observed quantities and electrical quantities have been selected. The determination of electrical impedance changes in the soil takes advantage of the method of electrical impedance spectroscopy (EIS). These changes are caused by the loading of soil by water. The changes in soil moisture produced by absorption of the soil and water infiltration (bank, induced, rainfall) will be focused on. The complexity of the problem is in the non-stationary water flowing through the non-saturated soil environment. Experimental experience shows that the hydraulic conductivity coefficient of the non-saturated soil is substantially lower than that of the saturated one (within the order of 1.10-3 to 1.10-4). The study of the water flow through the earth led to the design and verification of high sensitive laboratory electronic equipment, based on the principles stated, capable of indicating moisture and free water level changes in space and time. The laboratory verification of the methods was worked out within the granted project GACR 103/01/0057. The design and production of the equipment is capable of in-situ monitoring of the moisture changes. The goal of the submitted project is the design, development and production of the fully digitised automatic system for the mentioned changes, and its application on real subjects at different localities, so that selected methods and built equipment can be verified under practical conditions. The results of soil moisture changes and free water level movement monitoring will be applicable in the mathematical model calibration and verification, and localisation of soil cohesiveness defects, and possibly of other changes. The research, design, development and production of the automated system for the soil moisture changes will be the main business of the Czech participant - the project coordinator. The solution assumes production of one instrument for impedance measurement, one instrument capable of measuring water flow velocity using temperature field monitoring, and two systems for wireless data transport. A time period of 18 months is set for carrying out this part of the project. Two suitable localities will be selected, one in the CZECH REPUBLIC, the second in SLOVAKIA, making it possible to solve the monitoring problem within the following period of the project. The department from the Slovak partner institution - SLOVAK TECHNICAL UNIVERSITY, Faculty of Civil Engineering - will be trained to be able to handle the equipment and ensure continuous monitoring of soil moisture changes on the selected locality. This institution will ensure the evaluation of measured data and its delivery to the project participant. The period of monitoring selected localities is expected within 14 months from the installation of both items of equipment. Within this period, the experimental measurements of water flow around the solid obstacles will be worked out. The results of these experiments will be continuously offered to the Swiss partner - TECHNICAL UNIVERSITY BASEL - where they will verify and calibrate mathematical models created at this institution. The final period of the project - 4 months - will be devoted to the complex processing of results of the monitoring, their evaluation, and the offer of the automated measuring system to practical applicants (basin management institutions, local administrations and TBD). The most important outputs produced in the submitted EUREKA project will be as follows: - Production of the multi-channel, fully digital Z-meter, - Production of the multi-channel data logger capable of temperature monitoring, - Production of the wireless data transfer system, - Development and production of the software for system control and evaluation of results, - Results of monitoring at selected localities, - Results achieved by mathematical modelling, - Response of practice. It will be presented in the form of special reports and a final report about the project solution, and published at scientific conferences and in journals. Owing to the non-invasive character of selected monitoring methods, the business application of results is assumed. Keywords: electrical impedance, monitoring system, environment.
Acronym: 
RDPCMSSMM
Project ID: 
3 838
Start date: 
01-01-2007
Project Duration: 
36months
Project costs: 
1 020 000.00€
Technological Area: 
Electrical Technology related to measurements
Market Area: 
Environment

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