A method for determining optimal parameters for a field-scale hydraulic conductivity function is presented and tested on soil moisture and matric potential data measured at several locations in a field drainage experiment. The change in moisture content over time at the individual locations is modeled using Richards’ equation, and an optimization for the hydraulic conductivity parameters is per...

Let k be an algebraically closed (commutative) field, let A be an associative k-algebra, and let M = {M1, . . . , Mp} be a finite family of left A-modules. We study the simultaneous formal deformations of this family, described by the noncommutative deformation functor DefM : ap → Sets introduced in Laudal [8]. In particular, we prove that this deformation functor has a pro-representing hull, a...

The lowering of the groundwater table causes the area above the water table to become unsaturated and capillary phenomena to appear in this zone. This means that the bearing capacity of shallow footings will be influenced by capillary stress or matric suction. In this research, the effect of groundwater table lowering on the bearing capacity of a shallow square model footing on dense sand has b...

We found that peat moss, amended with various ratios of pellets comprised of equal proportions of biochar and wood flour, generally had chemical and physical properties suitable for service as a substrate during nursery production of plants. High ratios of pellets to peat (>50%) may be less desirable because of high C:N, high bulk density, swelling associated with water absorption, and low volu...

A computer tool has been developed that uses a k-Nearest Neighbor (k-NN) lazy learning algorithm to estimate soil water retention at 33 and 1500 kPa matric potentials and its uncertainty. The user can customize the provided source data collection to accommodate specific local needs. Ad hoc calculations make this technique a competitive alternative to publish pedotransfer equations, as re-develo...

In this paper, we study about the problem of stationary infiltration on several types homogeneous soil from a single trapezoidal channel. A governing equation in is form nonlinear differential and called Richards’ equation. The can be solved more easily by transforming it into modified Helmholtz study, Dual Reciprocity Boundary Element Method (DRBEM) was used to solve numerically. Then, using o...