[738] - Hybrid wireless underground sensor networks - Quantification of signal attenuation due to soil adsorption

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Citation
Bogena, H., Huisman, J. A., Meier, H., Rosenbaum, U., Weuthen, A., 2009. Hybrid wireless underground sensor networks - Quantification of signal attenuation due to soil adsorption. Vadose Zone Journal, 8 (3), 755 - 761. DOI: 10.2136/vzj2008.0138.
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Identification
Title(s):Main Title: Hybrid wireless underground sensor networks - Quantification of signal attenuation due to soil adsorption
Description(s):Abstract: Wireless sensor network technology allows real-time soil water content monitoring with a high spatial and temporal resolution for observing hydrological processes in small watersheds. The novel wireless soil water content network SoilNet uses the low-cost ZigBee radio network for communication and a hybrid topology with a mixture of underground end devices each wired to several soil sensors and aboveground router devices. Data communication between the end and router devices occurs partially through the soil, and this causes concerns with respect to the feasibility of data communication due to signal attenuation by the soil. In this study, we determined the impact of soil depth, soil water content, and soil electrical conductivity on the signal transmission strength of SoilNet. In a first step, we developed a laboratory experimental setup to measure the impact of soil water content and bulk electrical conductivity on signal transmission strength. The laboratory data were then used to validate a semi-empirical model that simulates signal attenuation due to soil adsorption and reflection and transmission at the soil boundaries. With the validated model, it was possible to show that in the case of a soil layer of 5 cm, sufficient power will remain to ensure data communication over longer distances for most soil conditions. These calculations are fairly simplified and should be considered as a first approximation of the impact of attenuation. In actual field situations, signal transmission may be more complex. Therefore, a field evaluation of signal attenuation is a crucial next step.
Identifier(s):DOI: 10.2136/vzj2008.0138
Responsible Party
Creator(s):Author: Heye Bogena
Author: Johan A. Huisman
Author: Heinrich Meier
Author: Ulrike Rosenbaum
Author: Ansgar Weuthen
Publisher:Soil Science Society of America
Topic
TR32 Topic:Soil
Subject(s):CRC/TR32 Keywords: WUSN, CRIM, Soil, Soil Water Content
File Details
File Name:2009_Bogena_VZJ.pdf
Data Type:Text
Size(s):7 Pages
File Size:1445 kB (1.411 MB)
Date(s):Issued: 2009-08-01
Mime Type:application/pdf
Data Format:PDF
Language:English
Status:Completed
Constraints
Download Permission:OnlyTR32
General Access and Use Conditions:For internal use only
Access Limitations:For internal use only
Licence:TR32DB Data policy agreement
Geographic
North:-no map data
East:-
South:-
West:-
Measurement Region:Laboratory
Measurement Location:--Laboratory--
Specific Informations - Publication
Status:Published
Review:PeerReview
Year:2009
Type:Article
Article Type:Journal
Source:Vadose Zone Journal
Issue:3
Volume:8
Number Of Pages:7
Page Range:755 - 761
Metadata Details
Metadata Creator:Heye Bogena
Metadata Created:2013-12-02
Metadata Last Updated:2013-12-02
Subproject:C1
Funding Phase:1
Metadata Language:English
Metadata Version:V40
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Page Visits:463
Metadata Downloads:0
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