Readme.soil ----------- The TARRAWARRA DATA SET ----------------------- COLLECTED BY: Dr Andrew Western and Dr Rodger Grayson Centre for Environmental Applied Hydrology Department of Civil and Environmental Engineering The University of Melbourne Parkville 3052 Australia fax: +61 3 9344 6215 email: a.western@engineering.unimelb.edu.au r.grayson@engineering.unimelb.edu.au ******************* Copyright ************************** Copyright (c) 1995-1998 Centre for Environmental Applied Hydrology, The University of Melbourne. Permission to use, copy and distribute this data and its documentation, for non-commercial purposes, is hereby granted without fee, provided that the above copyright notice appear in all copies, that both that copyright notice and this permission notice appear in supporting documentation, and that any publication resulting from the use of this data cites: A W Western and R B Grayson, "The Tarrawarra data set: Soil moisture patterns, soil characteristics and hydrological flux measurements", Water Resources Research, in review. Authors are requested to forward 2 copies of any publication utilising this data set to the address above. Any problems with interpreting the data or requests for further information should be addressed to Dr Andrew Western or Dr Rodger Grayson. ****************************************************************** Acknowledgments --------------- The Tarrawarra catchment is owned by the Cistercian Monks (Tarrawarra) who have provided free access to their land and willing cooperation throughout the project. Funding for this work was provided by: the Australian Research Council (project A39531077); the Cooperative Research Centre for Catchment Hydrology; Oesterreichische Nationalbank, Vienna (project 5309); the Department of Industry, Science and Technology, International Science and Technology Program; The University of Melbourne and The Ian Potter Foundation. The European Space Agency and the National Aeronautical and Space Agency provided SAR data free of charge. Assistance in the field and with data processing has been provided by Karen Moore. Field assistance has also been provided by Jenny Barkley, Alison Dedman, Judy Dunai, Sarah Ewing, Brian Finlayson, Myriam Ghali, Tim Green, Veronique Gomendy, Tony Ladson, Lee Heng, Natasha Heron, Neela Janakiramanan, Loic Mangeot, Tom McMahon, Graham Moore, Joorst Overbeek, Michael Roberts, Kate Smolenska, Hugh Turral, Mariska te Vaarwerk, Jeff Walker, Fred Watson, Garry Willgoose, Mark Wood, and Rodger Young. Garry Willgoose, Tom McMahon, Günter Blöschl, David Goodrich, Hugh Turral, and Brian Finlayson have provided useful suggestions on the field data collection. Veronique Gomendy and Hugh Turral assisted with interpretation of the soil cores. Graham Moore has provided help with instrumentation on the DCV. Fred Watson provided advice on GIS and data management. ------------------------------------------------------------------ Well Permeamter Data -------------------- Saturated hydraulic conductivity was measured using well permeameter methods. A 5.5 cm diameter well was used with a water depth of 20-25cm. Wells were augered under dry conditions. Steady-state saturated hydraulic conductivity was calculated using the Glover equation. The hydraulic conductivity data is supplied with a header and data records consisting of x coordinate, y coordinate (m Tarrawarra coordinates), depth to well base (cm), depth to water surface (cm), saturated hydraulic conductivity (mm/hr). The data delimiter is white space and the file is ksat.dat. Particle Size Data ------------------ Particle size distributions were established using sieving, followed by settling of the silt and clay fraction. The data consists of a table with the sample coordinate (m Tarrawarra coordinates), the depth range (cm) sample was taken within, the percentage of stone (>2mm diameter) as a fraction of the whole sample, and the percentages of coarse sand (2-0.2mm), fine sand (0.2-0.05mm), coarse silt (50-20 micrometers), fine silt (20-2 micrometers and clay (less than 2 micrometers) as a fraction of the fine part of the sample (less than 2mm). A header provides sampling and related information. The delimeter is whitespace and the file is particle.dat. Soil Profile Data ----------------- Layer depths and textures were estimated from 75mm cores taken to a depth of ~75cm. The data provides the layer depth and texture information. Depths were estimated visually and are accurate to +-2 cm of the layer boundary selected. Layer boundaries could be defined to +-2cm for sharply defined boundaries but are less accurate for gradual boundaries between layers. The A horizon consists of approximately 75% silt and 25% clay. B horizons are assigned to one of three qualitative texture categories based on appearance and hand texture. These three categories are silt (approximately 75% silt and 25% clay), clay (greater than approximately 50% clay) and silt clay which is intermediate between silt and clay. Note that these categories only approximately coincide with standard soil science definitions. The data consists of a header plus a table of coordinate coordinate (m Tarrawarra coordinates), the depth to the bottom of the A horizon (cm), the depth to the bottom of the B1 horizon (cm), the texture category of the B1 horizon, the depth to the bottom of the B2 horizon (cm)[if present], the texture category of the B2 horizon [if present]. It is white space delimeted. The file is layer.dat. Files ----- archive: (unix) otherdat.tar.Z; (DOS/windows) otherdat.zip; and (Macintosh) otherdat.sit. ascii: ksat.dat partical.dat horizon.dat