The soil water retention curve (SWRC) is essential for assessing flow and solute transport in unsaturated media. van Genuchten (VG) model widely used to describe the SWRC; however, estimation of its effective hydraulic parameters often prone error, especially when data exist only a limited range matric potential. We developed Metropolis-Hastings algorithm Markov chain Monte Carlo (MH-MCMC) appr...

Understanding hydrological behavior is an important part of effective watershed management and planning. Runoff resulted from rainfall a component that needed for efficient water resource In this paper, GIS based SCS-CN runoff simulation model was applied to estimate in Awash river basin. Global Curve Number (GCN250), Maximum Soil Water Retention (S) Rainfall used as input model. The final surf...

In the hilly regions of China, developing sustainable agriculture requires implementing conservation management practices that prevent soil erosion and conserve soil and water resources. In the semiarid northwest Loess Plateau, the primary conservation management practice is terracing. Numerical simulation of soil water dynamics in terraces is potentially an efficient means of investigating the...

Arsenic is a metalloid frequently found in contaminated sites, especially the soil. In this regard, soil contamination has attracted researchers’ attention because it affects suction, which essential unsaturated mechanics. Due to its reliability and low cost, filter paper method used evaluate suction. However, laborious time consuming. As an alternative, different mathematical models have been ...

Analysing unsaturated soil response often requires the soil-water-retention-curve (SWRC). The SWRC depends upon microstructure, which evolves with hydromechanical loading such as in-situ exposure to wetting-drying cycles. If is of interest and studied in laboratory, it essential specimens have a structure representative conditions. Simulating cycles laboratory possible albeit time-consuming fas...

Nitrogen balance in agroecosystems provides a quantitative framework of N inputs and outputs and retention in the soil that examines the sustainability of agricultural productivity and soil and environmental quality. Nitrogen inputs include N additions from manures and fertilizers, atmospheric depositions including wet and dry depositions, irrigation water, and biological N fixation. Nitrogen o...

The in-situ monitoring of soil suction and water content is important for a range applications from civil engineering (e.g. estimation groundwater infiltration) to agriculture optimization irrigation). efficiency field systems has recently improved thanks the development sensors that continuously record status data remotely transmit them through internet. These are, however, accessed by users o...