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Effect of data resolution on soil hydraulic conductivity prediction
Author(s) -
Sławiński Cezary,
Sobczuk Henryk,
Stoffregen Heiner,
Walczak Ryszard,
Wessolek Gerd
Publication year - 2002
Publication title -
journal of plant nutrition and soil science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 87
eISSN - 1522-2624
pISSN - 1436-8730
DOI - 10.1002/1522-2624(200202)165:1<45::aid-jpln45>3.0.co;2-i
Subject(s) - hydraulic conductivity , soil water , conductivity , resolution (logic) , high resolution , soil science , analytical chemistry (journal) , materials science , physics , environmental science , chemistry , remote sensing , chromatography , geology , computer science , artificial intelligence
The aim of the paper is to compare results of the instantaneous profile method (IPM) for measurement and calculation of unsaturated hydraulic conductivity k (ψ) of soils obtained with different measurement data resolution. The application of IPM allows to realize a great number of k (ψ) measurements for the purpose of mapping soil properties on large areas. Application of shorter samples i.e. less sensors makes the method even more quick and cheap. The calculation of unsaturated soil water conductivity by the IPM method bases on measurements of time and space variability of water content and water pressure within the soil sample in a cylinder. The spatial resolution of data depends on the number of probes applied in the core. The question arises how the number of compartments within one core influences the calculation of soil hydraulic conductivity. Application of three sensors instead of five reduced the accuracy of calculation but allowes to use 5 cm long standard cores during unsaturated flow experiment.