Pedotransfer function application for estimation of soil hydrophysical properties using parametric methods
2007
Matula, J.,Ceska Zemedelska Univ., Prague (Czech Republic). Fakulta Agrobiologie, Potravinovych a Prirodnich Zdroju | Spongrova, K.,Ceska Zemedelska Univ., Prague (Czech Republic). Fakulta Agrobiologie, Potravinovych a Prirodnich Zdroju
The measurement of soil moisture retention curve (SMRC) is laborious and time-consuming. Various SMRC estimation models have been proposed and used extensively to overcome this problem. Other more easily available soil properties, such as particle size distribution, organic matter content, soil structure, and bulk density were used for the estimation of SMRC. This study is based on European works by Woesten et al. (1998, 1999), and others. The pedotransfer functions derived by these researchers were used in the first part of the study. In the second part, the authors derived their own pedotransfer functions for the sites where all necessary data were available. The methodology of data processing was similar to that used by Woesten et al. (1998) for continuous pedotransfer functions. The use of these functions was tested on data sets from several Czech sites. Unfortunately, the available Czech data sets are not as large as the data sets used in Woesten's work. Quite good new estimates of SMRC (expressed as pF curves) were found for some of the sites only. Some estimates were less successful, partly because of insufficient input data. The quality and size of the input data sets are critical factors for a successful use of pedotransfer functions.
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