Effects of the micro-scale advection on the soil water movement in micro-irrigated fields

Evaluation of the Effect of Wind Velocity and Soil Moisture Condition on Soil Erosion in Andosol Agricultural Fields (Model Experiment)

“…The accuracy of this simulation model was verified the using the simulated and measured soil moisture conditions [31]. The friction velocity was estimated using the simulated wind velocity in Water 2019, 11, 98 8 of 11 the horizontal direction from Equations (1)-(3) and used to quantified the soil erosion amount by Equation (16).…”

“…A numerical model to simulate airflow in bare andosol field was developed using a continuity equation and Navier Stokes equations. This method is effective for clarifying the micro-scale advection in the irrigated-soil surface and airflow distribution in the agricultural field considering the crop canopy [30,31]. Wind tunnel experiments which described a bare andosol field were performed to measure the amount of soil erosion for four levels of soil moisture condition and five wind velocities to determine erodibility parameter.…”

An Inverse Method to Estimate the Root Water Uptake Source-Sink Term in Soil Water Transport Equation under the Effect of Superabsorbent Polymer

“…In general, it is difficult for us to obtain the dynamics of soil water movement, so modeling the dynamic process of water uptake by plant roots and water movement in soils has become an important and common research method in the field of irrigation and rain-fed agriculture. So far, most existing soil water movement models are using the Richards equation to describe the dynamics of water transport in soil[ 1 – 4 ], and models that take into consideration root water uptake have been constructed by adding a source/sink term of root water uptake (rate of water uptake) to the Richards equation[ 5 – 7 ]. However, the rate of root water uptake is not measurable under the current technical condition.…”