期刊
GEODERMA
卷 235, 期 -, 页码 300-307出版社
ELSEVIER
DOI: 10.1016/j.geoderma.2014.07.024
关键词
BEST (Beerkan Estimation of Soil Transfer parameters) procedure; Soil water retention; Saturated soil hydraulic conductivity; Simplified Falling Head technique
类别
资金
- Universita degli Studi di Palermo
- Sicilian Region (Progetto CISS) [G75e1100009000]
Establishing the ability of the Beerkan Estimation of Soil Transfer parameters (BEST) procedure to reproduce soil properties is necessary for specific soil types. In this investigation, the BEST predictions for a sandy loam soil were compared with water retention data obtained by a standard laboratory method and with the saturated soil hydraulic conductivity, K-s, obtained by both the Wu et al. (1999) method, applied to the BEST infiltration data, and the Simplified Falling Head (SFH) technique. When the original BEST-slope algorithm with the infiltration constants fixed at beta = 1.9 and gamma = 0.79 was applied, the agreement between the predicted and the measured retention data was satisfactory in terms of similarity of the means and correlation and coincidence between the regression and identity lines. The prediction of K-s, at a sampling point differed by not more than a factor of two from the K-s, value obtained by the Wu et al. (1999) method. The SFH technique yielded K-s, values approximately five times higher than those of BEST, probably because soil disturbance during water application, swelling and air entrapment phenomena had a lower impact on the measured infiltration data with the former technique. In conclusion, BEST is a promising approach for easily characterizing a soil, but its method of application should be adapted to the particular situation under consideration. Additional investigations carried out on different soils would allow development of more general procedures for applying BEST. (C) 2014 Elsevier B.V. All rights reserved.
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