[686] - Seasonal and event dynamics of spatial soil moisture patterns at the small catchment scale

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Rosenbaum, U., Bogena, H., Herbst, M., Huisman, J. A., Peterson, T., Weuthen, A., Western, A., Vereecken, H., 2012. Seasonal and event dynamics of spatial soil moisture patterns at the small catchment scale. Water Resources Research, 48 (10), 1 - 22. DOI: 10.1029/2011WR011518.
Title(s):Main Title: Seasonal and event dynamics of spatial soil moisture patterns at the small catchment scale
Description(s):Abstract: Our understanding of short- and long-term dynamics of spatial soil moisture patterns is limited due to measurement constraints. Using new highly detailed data, this research aims to examine seasonal and event-scale spatial soil moisture dynamics in the topsoil and subsoil of the small spruce-covered Wüstebach catchment, Germany. To accomplish this, univariate and geo-statistical analyses were performed for a 1 year long 4-D data set obtained with the wireless sensor network SoilNet. We found large variations in spatial soil moisture patterns in the topsoil, mostly related to meteorological forcing. In the subsoil, temporal dynamics were diminished due to soil water redistribution processes and root water uptake. Topsoil range generally increased with decreasing soil moisture. The relationship between the spatial standard deviation of the topsoil soil moisture (SD) and mean water content showed a convex shape, as has often been found in humid temperate climate conditions. Observed scatter in topsoil SD was explained by seasonal and event-scale SD dynamics, possibly involving hysteresis at both time scales. Clockwise hysteretic SD dynamics at the event scale were generated under moderate soil moisture conditions only for intense precipitation that rapidly wetted the topsoil and increased soil moisture variability controlled by spruce throughfall patterns. This hysteretic effect increased with increasing precipitation, reduced root water uptake, and high groundwater level. Intense precipitation on dry topsoil abruptly increased SD but only marginally increased mean soil moisture. This was due to different soil rewetting behavior in drier upslope areas (hydrophobicity and preferential flow caused minor topsoil recharge) compared with the moderately wet valley bottom (topsoil water storage), which led to a more spatially organized pattern. This study showed that spatial soil moisture patterns monitored by a wireless sensor network varied with depth, soil moisture content, seasonally, and within single wetting and drying episodes. This was controlled by multiple factors including soil properties, topography, meteorological forcing, vegetation, and groundwater.
Identifier(s):DOI: 10.1029/2011WR011518
Responsible Party
Creator(s):Author: Ulrike Rosenbaum
Author: Heye Bogena
Author: Michael Herbst
Author: Johan A. Huisman
Author: Tim Peterson
Author: Ansgar Weuthen
Author: Andrew Western
Author: Harry Vereecken
Publisher:American Geophysical Union
TR32 Topic:Soil
Subject(s):CRC/TR32 Keywords: Soil Moisture, Wireless Sensor, Hydrology
File Details
File Name:2012_Rosenbaum_WaterResourRes.pdf
Data Type:Text
Size(s):22 Pages
File Size:4089 kB (3.993 MB)
Date(s):Date Accepted: 2012-08-31
Issued: 2012-10-27
Mime Type:application/pdf
Data Format:PDF
Download Permission:OnlyTR32
General Access and Use Conditions:For internal use only
Access Limitations:For internal use only
Licence:TR32DB Data policy agreement
Measurement Region:Erkensruhr
Measurement Location:Wüstebach
Specific Informations - Publication
Article Type:Journal
Source:Water Resources Research
Number Of Pages:22
Page Range:1 - 22
Metadata Details
Metadata Creator:Ulrike Rosenbaum
Metadata Created:2013-12-02
Metadata Last Updated:2013-12-02
Funding Phase:2
Metadata Language:English
Metadata Version:V40
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Dataset Downloads:5
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