[1] Most parameterizations used in Large Eddy Simulations of the atmospheric boundary layer are based on the assumption that subgrid-scale fluxes are aligned against spatial gradients of transported quantities (down-gradient closures). Based on field experiments, we determine the distribution and most probable relative orientations of the subgrid-scale (SGS) heat flux relative to parameterizati...

Cover crops (CCs) are known to influence water infiltration just prior termination, but their effects on over time less known. This study investigated the of CCs in situ CC termination (during April) and again 2 mo after June). The multi-species mixture used included hairy vetch (Vicia villosa Roth.), crimson clover (Trifolium incarnatum L.), winter wheat (Triticum aestivum peas (Lathyrus hirsu...

Abstract. Sorptivity is a parameter of primary importance in the study unsaturated flow soils. This hydraulic required to model water infiltration into vertical soil profiles. can be directly estimated from functions (water retention and conductivity curves), using integral formulation Parlange (1975). However, calculating sorptivity this manner requires prior determination diffusivity its nume...

Jun Kong, Cheng-Ji Shen, Pei Xin, Zhiyao Song, Ling Li, D.A. Barry, D.-S. Jeng, F. Stagnitti, D.A. Lockington and J.-Y. Parlange 1 State Key Laboratory for Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, China 2 National Center for Groundwater Research and Training, School of Civil Engineering, The University of Queensland, Queensland, Australia 3 Key Laboratory ...

Using the Monte Carlo (MC) method, this paper derives arithmetic and geometric means and associated variances of the net capillary drive parameter, G, that appears in the Parlange infiltration model, as a function of soil texture and antecedent soil moisture content. Approximate expressions for the arithmetic and geometric statistics of G are also obtained, which compare favourably with MC gene...