000017114 001__ 17114
000017114 005__ 20200812081539.0
000017114 020__ $$a978-3-89336-710
000017114 037__ $$aPreJuSER-17114
000017114 041__ $$aEnglish
000017114 082__ $$a333.7
000017114 082__ $$a620
000017114 1001_ $$0P:(DE-Juel1)VDB72369$$aRosenbaum, Ulrike$$b0$$eCorresponding author$$gfemale$$uFZJ
000017114 245__ $$aAnalysis of spatial soil moisture dynamics using wireless sensor networks
000017114 260__ $$aJülich$$bForschungszentrum Jülich Gmbh Zentralbibliothek, Verlag$$c2011
000017114 3367_ $$0PUB:(DE-HGF)11$$2PUB:(DE-HGF)$$aDissertation / PhD Thesis
000017114 3367_ $$0PUB:(DE-HGF)3$$2PUB:(DE-HGF)$$aBook
000017114 3367_ $$02$$2EndNote$$aThesis
000017114 3367_ $$2DRIVER$$adoctoralThesis
000017114 3367_ $$2BibTeX$$aPHDTHESIS
000017114 3367_ $$2DataCite$$aOutput Types/Dissertation
000017114 3367_ $$2ORCID$$aDISSERTATION
000017114 4900_ $$0PERI:(DE-600)2445288-9$$aSchriften des Forschungszentrums Jülich : Energie & Umwelt / Energy & Environment$$v108$$x1866-1793
000017114 502__ $$aUniv. Bonn., Diss., 2011$$bDr. (Univ.)$$cUniversität Bonn$$d2011
000017114 500__ $$3POF3_Assignment on 2016-02-29
000017114 500__ $$aRecord converted from VDB: 12.11.2012
000017114 520__ $$aTo understand short-term and long-term dynamics in spatial soil moisture patterns at the small catchment scale, appropriate measurement techniques are needed. Recently developed wireless sensor networks help to bridge the gap between local (e.g. hydrogeophysical methods) and regional soil moisture measurement techniques (e.g. satellite borne remote sensing). Wireless sensor networks like SoilNet routinely provide continuous soil moisture data with both high temporal and spatial resolution, also spatial coverage of a given test site. An essential requirement for the development of a wireless sensor network is the selection of appropriate soil water content sensors. Low-cost sensors are often criticized concerning their measurement accuracy in terms of considerable variation between individual sensors, temperature-dependency and spurious effects of electrical conductivity on the sensor response. In this thesis, by means of laboratory experiments using dielectric reference liquids soil moisture sensors ECH$_{2}$O (Decagon Devices, Inc., Pullman, WA) were evaluated regarding their measuring accuracy, i.e. sensor-to-sensor variability and temperature as well as electric conductivity effects. Consideration of sensor-to-sensor variability by means of a sensorspecific calibration significantly improves the apparent dielectric permittivity estimate, in particular in the high permittivity range (i.e. high soil water content range). Temperature effects on the apparent dielectric permittivity measurement, which could be related to the sensor circuitry, were successfully quantified in dielectric reference liquids, furthermore corrected and also validated for selected soil samples of different texture classes. The assessment of electrical conductivity effects on apparent dielectric permittivity estimation was limited to the high permittivity range (ε > ~26) due to method constrains. However,[...]
000017114 536__ $$0G:(DE-Juel1)FUEK407$$2G:(DE-HGF)$$aTerrestrische Umwelt$$cP24$$x0
000017114 655_7 $$aHochschulschrift$$xDissertation (Univ.)
000017114 8564_ $$uhttps://juser.fz-juelich.de/record/17114/files/FZJ-17114.pdf$$yRestricted$$zPrepress version for printing
000017114 909CO $$ooai:juser.fz-juelich.de:17114$$pVDB:Earth_Environment$$pVDB
000017114 9141_ $$y2011
000017114 9131_ $$0G:(DE-Juel1)FUEK407$$bErde und Umwelt$$kP24$$lTerrestrische Umwelt$$vTerrestrische Umwelt$$x0
000017114 9132_ $$0G:(DE-HGF)POF3-259H$$1G:(DE-HGF)POF3-250$$2G:(DE-HGF)POF3-200$$aDE-HGF$$bMarine, Küsten- und Polare Systeme$$lTerrestrische Umwelt$$vAddenda$$x0
000017114 920__ $$lyes
000017114 9201_ $$0I:(DE-Juel1)IBG-3-20101118$$gIBG$$kIBG-3$$lAgrosphäre$$x0
000017114 970__ $$aVDB:(DE-Juel1)131508
000017114 980__ $$aVDB
000017114 980__ $$aConvertedRecord
000017114 980__ $$aphd
000017114 980__ $$aI:(DE-Juel1)IBG-3-20101118
000017114 980__ $$aUNRESTRICTED