The resistivity values used to obtain the VWC represented in the 2D images were obtained during measurements conducted at the end of wet season (May 2005). On top the 2D images of the Earth model for cerrado denso along transect 2 represent the distribution of VWC after conversion of resistivity values with the equation ln(Resistivity) = 10.882 – 0.004% VWC 2. Trends in (a) basal area and VWC 0–300, (b) tree density and VWC 0–700, and (c) canopy depth and VWC 700–1000 in Águas Emendadas. Values of VWC were summed for intervals of 0–700 and 700–1000 cm. All VWC values were obtained from resistivity measurements conducted during 2005, except for measurements from March, which were conducted in 2006.Įstimated VWC for the months of February and October of 2003 along three transects located in Águas Emendadas. Values of VWC represent the average of all resistivity values along the 275-m transect measured at each month. Profiles of mean VWC for transect 2- by 1-m soil depth increments and by month during 2005–06.Ģ005–06 column-integrated VWC for the 0–700-cm and 700–1000-cm soil layers as function of monthly precipitation in Águas Emendadas. (a) Changes in resistivity along soil profile by month of measurement obtained from areas of soil pits located in Águas Emendadas equipped with TDR, and (b) relationship between resistivity values and soil moisture content measured with TDR among depths and dates. Distance between electrodes was 5 m (for a transect of 275-m length) and measurements used Wenner configuration. The 2D resistivity measurements were conducted during the middle of the wet season in and at the end of the dry season in. Inverted 2D resistivity Earth models for cerrado denso along transects in Águas Emendadas (Brazil). Soil samples were obtained from the same 8-m soil pit equipped with TDR. Soil characteristics of cerrado denso ecosystem in Águas Emendadas.
Red titles indicate specific dates when resistivity measurements were conducted. The source was the Chapada station of EMBRAPA-Cerrados (Centro de Pesquisas Agropecuárias do Cerrado) located (15☃5′30″S, 47☄2′30″W) close to the study sites in Águas Emendadas. Total monthly rainfall for the years 2002–06 and daily precipitation for 2005– 06. IKONOS image () of Águas Emendadas area near Brasilia (Brazil) showing the location of transects along the study sites.
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